PRINCIPLES OF PROGRAMMING LANGUAGES - vardhaman.org · 3. a) Discuss Implementation of Array in detail. 5M b) Discuss the concept of Binding, and Binding types with a simple example

Hall Ticket No: Question Paper Code: A3512

(AUTONOMOUS) B. Tech IV Semester End Semester Regular Examinations, April - 2017

(Regulations: VCE-R15)

PRINCIPLES OF PROGRAMMING LANGUAGES

(Computer Science and Engineering)

Date: 28 April, 2017 FN Time: 3 hours Max Marks: 75

Answer ONE question from each Unit All Questions Carry Equal Marks

Unit – I

1. a) Draw a neat flow chart of Compilation process. 8M b) For the expression A = B + C * A , Find the leftmost derivation using unambiguous

grammar

7M

2. a) Draw an unique parse tree for A = B + C * A, using an unambiguous grammar. 7M b) Write the Attribute Grammar for any four simple assignment statements.

8M

Unit – II

3. a) Discuss Implementation of Array in detail. 5M b) Discuss the concept of Binding, and Binding types with a simple example.

10M

4. a) Discuss Operations on Records, Evaluation and Comparison to Arrays, Implementation of Record Type.

9M

b) Explain Type Checking in detail.

6M

Unit – III

5. a) Explain Loop Guarded Command. Illustrate the same with a diagram. 7M b) What are Selection Statements? Explain the 2 types of Selection Statements with their

design issues.

8M

6. a) Discuss the following with respect to subprograms: i. Design issues ii. Local referencing environments iii. Parameter Passing Methods

9M

b) Give the diagrammatic representation for Coroutine execution sequence with loops

6M

Unit – IV

7. a) Define ADT, give the advantages and its design issues. 8M b) Explain Dynamic binding.

7M

8. a) Discuss the following with simple code samples wherever required: i. Parameterized Abstract Data Types ii. Parameterized ADTs in C++ iii. Parameterized Classes in Java 5.0 iv. Encapsulation in Java v. Naming Encapsulations

10M

b) Explain: i. Storage structures for instance variables ii. Dynamic binding of messages to methods

5M

Unit – V

9. a) Give the general form of exception handlers in Java in detail with an example. 12M b) What are the three characteristics of Haskell that make it different from ML?

3M

10. a) Explain first LISP interpreter. Give its internal representation two LISP lists. 8M b) Why can concurrency be easier with functional languages than imperative languages? 7M


(AUTONOMOUS) B. Tech IV Semester Regular Examinations, April/May - 2017


ENVIRONMENTAL SCIENCE

(Common to Computer Science and Engineering, Information Technology, Electrical and Electronics Engineering & Mechanical Engineering)

Date: 01 May, 2017 FN Time: 3 hours Max Marks: 75


Unit – I

1. a) Illustrate the various environmental ill effects and benefits associated with dams. 8M b) Define Environment. State the need for public awareness for solving environmental

problems.

7M

2. a) Discuss in detail the factors responsible for Land Degradation. What are the means to prevent land degradation?

7M

b) Define Deforestation. What are the causes of Deforestation? Discuss its consequences.

8M

Unit – II

3. a) Explain the concept of an Ecosystem. Give a Schematic representation of the structure of an ecosystem.

8M

b) What do you understand by Hotspots of Biodiversity? Name and briefly describe the two hotspots of Biodiversity that extend into India.

7M

4. a) Explain food chains and food webs. Describe importance of food webs. 7M b) Briefly explain the direct and indirect values of Biodiversity.

8M

Unit – III

5. a) Discuss the causes and effects of Soil Pollution. What control measures can be taken for prevention of Soil Pollution?

7M

b) What are the effects of improper Municipal Solid Waste Management? State the measures recommended for proper management?

8M

6. a) Elaborate the following concepts: i. Resettlement and Rehabilitation ii. Rain Water Harvesting

7M

b) Define Ozone Layer Depletion. Discuss the causes, effects and control methods of Ozone Layer Depletion.

8M

Unit – IV

7. a) Describe the role of information technology in the field of human health. 8M b) Analyze the “polluter pay principal”. Does it bring balance to the environment?

7M

8. a) Define green building. Mention its environmental benefits with illustrations. 8M b) Explain how information technology plays important role in the field of environment? 7M

Unit – V

9. a) Explain the issues involved in enforcement of Environmental Legislation. 7M b) Define Environmental Ethics and Discuss why they are important with respect to

Environmental Protection?

8M

10. a) Discuss the Salient features of Environmental Protection Act and Forest Conservation Act. 8M b) Define Environmental Impact Assessment. Discuss the purpose, goals and benefits of

Environmental Impact Assessment. 7M




FORMAL LANGUAGES AND AUTOMATA THEORY

(Common to Computer Science and Engineering & Information Technology)



Unit – I

1. a) Design a DFA which accepts all the strings with even number of 0’s and odd number of 1’s over an alphabet 0,1.

6M

b) Convert the following NFA to a DFA recognizing the same language, using the subset construction. Give a state diagram showing all states reachable from the start state, with an informative name on each state. Assume the alphabet is 0, 1.

Fig.1

9M

2. a) Explain the finite automata (FA) with output clearly indicating the machine types. 6M b) Convert the given NFA with ɛ-moves to DFA:

Fig.2

9M

Unit – II

3. a) Write the regular expression for the following languages over the alphabet a, b i. L = an bm: n < 4, m ≥ 3 ii. All the strings not ending with ‘ab’ iii. All the strings do not contain two consecutive a’s

9M

b) Give the regular expression for the following DFA:

Fig.3

6M

Cont….2

::2::

4. a) State and prove pumping lemma for the regular language. 9M b) Describe which languages the following regular expressions represent:

i. (0 ∪ 1)* 01 ii. 1*01* iii. (11)* iv. (0*10*10*)* v. (0 ∪ 1)*01(0 ∪ 1)* vi. 1*0*

6M

Unit – III

5. a) Write the context free grammars for the following regular expressions: a* a* U b* a(a* U b*)b

8M

b) Consider the grammar G = (V, ∑, R, S), where ∑ = the_lady, the_gentleman, the_flowers, with, behind V = S, NP, P, PP R = S → NP NP → NP PP PP → P NP NP → the_lady NP → the_gentleman NP → the_flowers P → with P → behind Consider the string: "the_lady behind the_gentleman with the_flowers" Give two derivations for the string using same rules in different order using different rules at some step of the derivation process.

7M

6. a) Eliminate all unit productions from below grammar: S ABA | BA | AA | AB | A | B A aA | a B bB | b

8M

b) Convert the below grammar to CNF: S aAD, A aB | bAB, B b, D d

7M

Unit – IV

7. a) Differentiate : Deterministic PDA and Nondeterministic PDA Language accepted by PDA by final state and by empty stack.

7M

b) Design PDA for the following language accepted by final state. Also write instantaneous description for the string ”aabbbbbccc”. L = anbn+mcm : n ≥ 0 , m ≥ 1

8M

8. a) Is the PDA corresponding to the language L = wwR | w Є (a+b)* is deterministic? 10M b) Write the procedure to convert CFG to PDA and Vice versa. 5M

Unit – V

9. a) Define Turing machine along with its working. 7M b) Design a Turing Machine to recognize 0n1n2n.

8M

10. a) Write note on Universal Turing machine and Extensions of Turing machine. 8M b) What are linear bound automata? Mention the conditions that satisfy LBA. 7M




SOFTWARE ENGINEERING




Unit – I

1. a) What do you mean by Software Myth? Explain Management Myth and Customer Myth

8M

b) Explain the spiral model and its advantages.

7M

2. a) What is Software Engineering and Explain the key challenges of Software Engineering. 8M b) Explain why change is inevitable in complex systems and give examples (apart from

prototyping and incremental delivery) of software process activities that help predict changes and make the software being developed more resilient to change.

7M

Unit – II

3. a) When would you recommend against the use of an agile method for developing a software system?

8M

b) Extreme programming expresses user requirements as stories. Discuss the advantages and disadvantages of this approach to requirements description.

7M

4. a) What do you mean by Extreme Programming? Explain the extreme programming practices in detail.

7M

b) Suggest four reasons why the productivity rate of programmers working as a pair might be more than half that of two programmers working individually.

8M

Unit – III

5. a) What do you mean by Requirement Validation? Explain in detail. 7M b) Using examples, explain the difference between an object and an object class.

8M

6. a) Discover ambiguities or omissions in the following statement of requirements for part of a ticket-issuing system. “An automated ticket-issuing system sells rail tickets. Users select their destination and input a credit card and a personal identification number. The rail ticket is issued and their credit card account charged. When the user presses the start button, a menu display of potential destinations is activated, along with a message to the user to select a destination. Once a destination has been selected, users are requested to input their credit card. Its validity is checked and the user is then requested to input a personal identifier. When the credit transaction has been validated, the ticket is issued.”

7M

b) Suggest who might be stakeholders in a university student records system. Explain why it is almost inevitable that the requirements of different stakeholders will conflict in some way.

8M

Unit – IV

7. a) Explain the important characteristics of a good design. 7M b) Write any two architectural styles with a neat sketch.

8M

8. a) Discuss the importance of data abstraction and Modularity in software design 8M b) Explain the User Interface Design Steps. 7M

Cont…2

:: 2 ::

Unit – V

9. a) What do you mean by software quality? Explain the attributes which can be used to measure the software quality.

8M

b) Explain why it is not necessary for a program to be completely free of defects before it is delivered to its customers. To what extent can testing be used to validate that the program is fit for its purpose?

7M

10. a) Discuss the differences between verification and validation, and explain why validation is a particularly difficult process.

8M

b) Explain the concept of Top-Down integration and Bottom-Up integration testing. 7M

Hall Ticket No: Question Paper Code : A3515

(AUTONOMOUS)

B. Tech IV Semester Regular Examinations, April/May - 2017 (Regulations: VCE-R15)

OPERATING SYSTEMS (Common to Computer Science and Engineering & Information Technology)


Answer ONE question from each Unit

All Questions Carry Equal Marks

Unit – I

1. a) Explain the following Computer-system Architecture: i. Single –processor systems ii. Multi-processor systems iii. Clustered systems

7M

b) Demonstrate the following commands with their syntax and options: i. cat ii. mkdir

8M

2. a) Explain various services of the operating system. 8M b) Explain the Dual-mode operation of the operating system.

7M

Unit – II

3. a) Write a short note on the following with respect to Process: i. Process States with state diagram ii. Process Control Block (PCB)

10M

b) Why it is important for the scheduler to distinguish I/O bound programs and CPU-bound programs?

5M

4. a) Consider the snapshot of a system with 5 processes with their burst time given in milliseconds:

Process Burst time

P1 10

P2 1

P3 2

P4 3

P5 5

Define the terms: i. Turnaround time ii. Average turnaround time iii. Through put iv. Waiting time v. Average waiting time Find the above for all the processes using SJF, Round robin (Q=2). Compare the results.

10M

b) Demonstrate the following system calls with their syntax: Shmctl() Shmget() Shmat()

5M

Cont…2

::2::

Unit – III

5. a) With neat diagram explain swapping. 6M b) A system contains four processes P1, P2, P3, P4 and 6,4,8,5 resource units of resource

classes R1, R2, R3, and R4. The allocation state of the system is (5, 3, 5, 4). Process P2 has made request (0, 1, 1, 0). Use Banker’s algorithm to Check whether request is safe:

R1 R2 R3 R4 R1 R2 R3 R4

P1 2 1 2 1 P1

1 1 1 1

P2 2 4 3 2 P2 2 0 1 0

P3 5 4 2 2 P3 2 0 2 2

P4 0 3 4 1 P4 0 2 1 1

Max Allocation

9M

6. a) With diagram explain inverted page table. 6M b) Consider following reference string, using FIFO page replacement algorithm find how

many page fault occurs and explain the steps involved. Frame allocation = 3 Reference string: 70120304230321201701.

9M

Unit – IV

7. a) With diagram explain tree structured directory and two level directory structures. 8M b) Explain different file operations and file attributes.

7M

8. a) Explain redirection operators in Unix. 6M b) Suppose that a disk drive has 5000 cylinders, numbered 0 to 4999. The drive is

currently serving a request at cylinder 143, and the previous request was at cylinder 125. The queue of pending requests in FIFO order is: 86, 1470, 913, 1774, 948, 1509, 1022, 1750, 130. Starting from the current head position, what is the total distance that the disk arm moves to satisfy the pending requests for each of the following disk scheduling algorithm: i. FCFS ii. SSTF iii. C-SCAN

9M

Unit – V

9. a) Discuss different methods of Implementation of Access Matrix. 8M b) Discuss various intrusion detection techniques.

7M

10. a) Explain different security attacks. 8M b) Explain symmetric encryption and asymmetric encryption with an example. 7M




DATABASE MANAGEMENT SYSTEMS




Unit – I

1. a) Write various applications of database system. 6M b) Explain the component modules of a DBMS and their interactions with the

architecture.

9M

2. a) Discuss extended ER features with an example. 7M b) Draw an ER diagram corresponding to customers and loans. 8M

Unit – II

3. a) i. Explain any three aggregate operations in SQL. ii. Compare the execution of nested queries with correlated nested queries with

example.

7M

b) WORKS (Pname, Cname, Salary) LIVES(Pname, Street, City) LOCATED_IN(Cname, City) Where Pname=Person name, Cname=Company name and Mgrname=Manager name. Write the Relational Algebra Expressions for the following:

i. Find the people who work for the company ‘Infosys’ with a salary more than Rs.50000/-

ii. List the names of the people along with the street and city addresses iii. Find the names of the persons who live and work in the same city iv. Display the average salary and number of the employees company wise

8M

4. a) Compare the different joins in relational algebra. 7M b) Write appropriate SQL DDL statements to create the following relations of a

database that keeps track of business trips of salespersons in a sales office: SALESPERSON(Ssn, Name, Start_year, Dept_no) TRIP(Ssn, From_city, To_city, Departure_date, Return_date, Trip_id) EXPENSE(Trip_id, AccountNo, Amount) Account(AccountNo, Name, Bank, Branch) Specify the keys and referential actions.

8M

Unit – III

5. a) Illustrate redundancy and the problems that it can cause. Give examples of insert, delete, and update anomalies. Explain how the problems caused by redundancy can be resolved.

8M

b) Explain the necessity of Third Normal Form with an example.

7M

6. a) Define functional dependency. Explain Boyce-Codd Normal Form. 7M b) What is the significance of decomposition? Discuss the two properties of

decomposition. 8M

Cont…2

::2::

Unit – IV

7. a) List and Explain the important properties of transactions that DBMS must ensure to maintain data concurrency and system failures.

7M

b) Explain Strict Two-Phase Locking mechanism.

8M

8. a) Create precedence graph for the following schedule. Determine whether it is (conflict) serializable schedule or not. W1(A), R2(A), W1(B), W3(C), R2(C), R4(B), W2(D), W4(E), R5(D), W5(E)

8M

b) Explain deadlock with an example. Discuss how deadlock prevention and detection can be achieved.

7M

Unit – V

9. a) Define RAID. Discuss Data Stripping and Redundancy with example. 8M b) Explain how clustered and unclustered indexes effect the efficiency of searching?

7M

10. a) Explain B+ tree. Give the main characteristics of B+ tree. 8M b) Explain the operations that are considered for appropriate file organization. 7M




COMPUTER ORGANIZATION AND ARCHITECTURE (Common to Information Technology & Electronics and Communication Engineering)



Unit – I

1. a) Explain the different registers that are available in the processor of a digital computer and the connection between the processor and the memory.

7M

b) With the diagram explain use of a multiplexer to transfer information from two sources into a single destination.

8M

2. a) Explain Arithmetic, logic and shift micro operations with example. 7M b) Provide the basic performance equation. Describe any two possible ways by which

performance can be improved. 8M

Unit – II

3. a) Explain basic instruction types. Give an example for each type. 7M

b) Explain role of different computer registers with respect to instruction Fetch cycle

and execution. Give an example.

8M

4. a) Explain the following addressing mode with suitable example:

i. Immediate Mode

ii. Indirect Mode

iii. Index Mode

iv. Auto decrement Mode

v. Register Mode

7M

b) Write a program that can evaluate the expression A x B + C x D, in a single

accumulator processor. Assume that the processor has Load, Store, Multiply, and

Add instructions and that all values fit in the accumulator.

8M

Unit – III

5. a) Perform booth multiplication on the following numbers -13(multiplicand), +11

(multiplier).

7M

b) Illustrate with an example format of micro instructions. 8M

6. a) Give an algorithm for restoring division method. Illustrate the working of the

algorithm for 8/3.

7M

b) With the diagram explain the basic organization of micro programmed control unit. 8M

Unit – IV

7. a) Explain in detail the different mappings used for cache memory. Compare them. 7M

b) An address space is specified by 24 bits and the corresponding memory space by 16

bits.

i. How many words are there in the address space?

ii. How many words are there in the memory space?

iii. If a page consists of 2K words, how many pages and blocks are there in the

system?

8M

8. a) Explain the internal organization of 2Mx8 dynamic memory chips. 7M

b) With the neat diagram explain the concepts of direct memory access. 8M

Cont…2

:: 2 ::

Unit – V

9. a) Explain the following Dynamic arbitration algorithms: i. LRU ii. Time slice iii. Polling iv. Rotating daisy chain

8M

b) How the cache coherence problem is resolved by a snoopy cache controller? 7M 10. a) Differentiate between Synchronous and asynchronous bus. 5M b) Explain the following interconnection networks in detail:

i. Multiport Memory ii. Crossbar switch

10M




COMPUTER GRAPHICS

(Information Technology)



Unit – I

1. a) Discuss the characteristics of Direct View Storage Tube Devices. 7M b) With a neat cross sectional view explain the function of CRT devices.

8M

2. List the operating characteristics of the following display technologies: i. Raster scan systems ii. Random scan systems iii. Plasma panels iv. LCD

15M

Unit – II

3. a) Write Mid-Point Circle Algorithm. 8M b) Consider the line from (0, 0) to (4, 6). Rasterize the line using the simple DDA algorithm.

7M

4. a) Discuss in detail about Parallel line algorithms. 7M b) Explain the scan line algorithm for polygon filling.

8M

Unit – III

5. a) Write the Cohen-Sutherland Line Clipping Algorithm and explain the same with a neat diagram.

10M

b) Find the transformed point, P’, caused by rotating P= (5, 1) about the origin through an angle of 90°.

5M

6. a) Explain the polygon clipping algorithm with a suitable example. 8M b) With neat diagrams explain OpenGL Viewing Pipeline and Viewing Pipeline and

Coordinates.

7M

Unit – IV

7. a) Write 3D Transformation Matrices for Translation, Scaling, Rotation about X, Y, Z axis. 8M b) Discuss - Polygon Surfaces.

7M

8. a) Explain Shear transformation in detail. 7M b) Provide any 5 Properties of B-spline Curves.

8M

Unit – V

9. a) Write about Painter’s algorithm. 9M b) Explain Keyframe Animation.

6M

10. a) Explain Back-Face Detection. 9M b) Discuss the following:

i. General computer animation functions ii. Computer Animation Languages

6M


(AUTONOMOUS)

B. Tech IV Semester Regular Examinations, April/May - 2017 (Regulations: VCE-R15)

ELECTROMAGNETICS AND TRANSMISSION LINES (Electronics and Communication Engineering)




Unit – I

1. a) Prove Gauss Law and Find the Electric Flux Density due to infinite Line Charge using Gauss Law?

8M

b) Four Point Charges of 500 C each are placed at the corners of a 3 m side square. The

Square located in the Z = 0 free space plane between x=+ 3 and y=+ 3 m in free

space. Find the force on a point charge 30 C located at (0,0,4).

7M

2. a) State and explain point form of continuity equation. Given the field H=20ρ2 aφ A/m. Determine the current density J.

7M

b) If a sphere of radius has a charge density 3krv then find D and D as a function

of radius r and sketch the result. Assume k constant.

8M

Unit – II

3. a) State and explain Ampere’s Circuital Law. Use Ampere’s Circuital Law to obtain H due to an infinitely long straight filament of current I.

7M

b) A solenoid of 200 turns wound tightly on a cylindrical tube of length 60cm and of diameter 6cm, given that medium is air. Find the inductance. Derive the formula used.

8M

4. a) State and prove Biot-Savart’s law and explain the relation between B and H with an example.

7M

b) Explain briefly magnetic scalar and vector potential. Let A=(3y-z)ax + 2xzayWb/m in certain region of free space. Find B and H at point P(2,-1,3).

8M

Unit – III

5. a) Explain the inconsistency in Ampere circuital law and high light the difference between Conduction Current Density and Displacement Current Density.

8M

b) In a material for which ς=5 S/m and εr=1, the electric field intensity is E=250 sin1010t V/m. Find the conduction and displacement current densities and the frequency at which both have equal amplitudes.

7M

6. a) Derive the expression for tangential and normal components of electric field intensity and electric flux density at the boundary between the two perfect dielectrics.

8M

b) Given E

=Em sin(ωt-βz) ya

in free space, find , ,D H B

. Sketch E

and H

at t=0.

7M

Unit – IV

7. a) Explain the propagation in good conductors. Hence derive an expression for depth of penetration or skin depth.

7M

b) Consider the fields: E(z,t)=2000 cos(107πt-βz) xa

V/m and H(z,t)=4 cos(107πt-βz) ya

A/m

represent a uniform plane wave propagating in Z-direction at a velocity of 1.5x108 m/sec in a perfect dielectric. Find phase constant, wavelength, intrinsic impedance, relative permeability, relative permittivity and attenuation constant.

8M

Cont…2

::2::

8. a) Discuss the reflection of uniform plane waves at normal incidence. 7M

b) Travelling E

and H

waves in the free space(region-1) are normally incident on the interface with a perfect dielectric (region-2) with εr=3.0. Compare the magnitude of the

incident wave and transmitted E

and H

waves at the interface.

8M

Unit – V

9. a) Derive the input impedance of open and short circuited line with the lines being dissipation less. Also show the variation of X/R0 v/s length of line.

7M

b) A lossless transmission line with Z0=60Ω is 400m long. It is terminated with a load ZR=40+j80Ω and operated at a frequency of 1MHz. The velocity of the wave on the line is 0.8 times the velocity of light. Using Smith chart, find: i. The reflection co-efficient ii. SWR iii. Input impedance

8M

10. a) Derive an expression for the input impedance of a quarter wave line. Explain how it can be used for impedance matching?

7M

b) A line of Zo=400Ω is connected to a load of 200+j300Ω which is excited by a matched

generator at 800MHz. Find the location and length of a single stub nearest to the load to produce an impedance match. (with or without Smith chart).

8M




PRINCIPLES OF ELECTRICAL ENGINEERING

(Electronics and Communication Engineering)



Unit – I

1. a) When two coils are connected in series, their effective inductance is 6.0H. However when the connections of one coil are reversed, the effective inductance is 10.0H. If the coefficient of coupling is 0.6, calculate the self inductance of each coil and mutual inductance.

8M

b) An iron ring of mean length 1mt has an air gap of 1mm and a winding of 200 turns, if the relative permeability of iron is 500, when a current of 1A flows through the coil, find the flux density.

7M

2. a) State both Faraday’s laws of Electromagnetic induction and derive the expression for induced emf.

6M

b) Derive the expression for total inductance when connected in series for cummulative coupling and differential coupling separately.

9M

Unit – II

3. a) Derive the transient response of R-L series for DC excitations. 7M b) A dc voltage of 100V is applied in the circuit shown in Fig.1 and the switch is kept open.

The switch K is closed at t = 0. Find the complete expression for the current.

Fig.1

8M

4. a) Derive the transient response of R-C series for AC excitations. 8M b) A series R-L circuit with R = 30Ω and L=15H has a constant voltage V= 60 v applied at

t = 0. Determine the current I, Voltage across resistor and inductor.

7M

Unit – III

5. a) Explain Swinburne’s test. 5M b) Derive the emf equation of a dc generator. A 20kW, 200V shunt generator has an

armature resistance of 0.05ohm and a shunt field resistance of 200ohm. Calculate the power developed at the armature when it delivers rated output.

10M

6. a) Explain the constructional details of a DC generator indicating their functions. 7M b) A dc shunt machine connected to 250V supply has an armature resistance of 0.1ohm

and a field resistance of 100 ohm. Find the ratio of the speed as a generator to the speed as a motor when the line current in each case being 80A.

8M

Cont…2

:: 2 ::

Unit – IV

7. a) Explain the constructional details of core and shell type of transformer. 6M b) A 10 KVA, 500/250V, 50Hz single phase transformer gave the following test results: SC

test (HV side): 60V, 20A, 150W. The maximum efficiency occurs at unity power factor and at 1.2 full load current. Determine the full load efficiency at 0.8 power factor lagging.

9M

8. a) Explain the phasor diagram of a single phase transformer on No load. 8M b) The efficiency of a 400KVA single phase transformer is 98.77% when delivering full load

at 0.8p.f and 99.13% at half load and unity power factor. Calculate iron losses and full load copper losses.

7M

Unit – V

9. a) Explain the slip torque characteristics of a three phase induction motor. 7M b) A 3 phase induction motor has 2 poles and is connected to 400V, 50Hz supply. Calculate

the actual rotor speed and rotor frequency when the slip is 4%.

8M

10. a) Deduce the condition for the maximum torque in a 3-φ induction motor. 8M b) Calculate the slip and actual speed in case of 6 pole induction motor is running from 60hz

supply and having an emf in the rotor of frequency 3hz. 7M




ANALOG COMMUNICATIONS




Unit – I

1. a) Draw the circuit diagram of Ring modulator and explain its operation and indicate all the waveforms and spectrums.

8M

b) In DSB AM system, the carrier is c(t)=Acos(2πfct) and the message signal is given by m(t)=sinc(t)+sinc2(t). Find the frequency domain representation and bandwidth of the modulated signal.

7M

2. a) Describe with suitable block diagram the coherent detection of DSB-SC modulated wave using Coastas receiver.

8M

b) Consider the message signal m(t)=30cos2πt volts and the carrier wave c(t)=50cos100πt: i. Give the time domain expression for the resulting conventional AM wave for 75%

modulation ii. Find the power developed across a load of 100Ω due to this AM wave

7M

Unit – II

3. a) Explain the concept of frequency division multiplexing with relevant block diagram. 7M b) In SSB-SC system LSB of a message signal is transmitted. The local carrier has no

frequency error but a phase error of θ radians. Discuss the effect of phase error on the demodulated signal.

8M

4. a) Explain and analyze with suitable block diagram how a single carrier frequency can be used to send two signals simultaneously over the same channel.

7M

b) The single tone modulating signal m(t) = Amcos(2fmt) is used to generate the VSB signal.

s(t)=aAmAccos[2(fc +fm)t] +(1-a)AmAccos[2(fc -fm)t] Where a is constant, less than unity, representing the attenuation of the upper sideband frequency. Find the in-phase and quadrature component of the VSB modulated signal s(t). What is the value of constant a for which s(t) reduces to a DSBSC modulated wave? What is the value of constant a for which s(t) reduces to an SSBSC modulated wave?

The VSB wave s(t) plus the carrier Accos(2fct) is he passed through an envelope detector . Determine the distortion produced by the quadrature component. What is the valued of ‘a’ for which this distortion reaches its worst possible value?

8M

Unit – III

5. a) With a neat block diagram, explain Armstrong method of FM generation. 7M b) A carrier is frequency modulated with a sinusoidal signal of 2KHz resulting in a max

deviation of 5KHZ. Find the bandwidth required. If the amplitude of the modulating signal is increased by a factor of 3 and its frequency is lowered to 1 KHz, find the maximum frequency deviation and bandwidth of the new modulated signal.

8M

Cont…2

::2::

6. a) Show that how a PLL can be used in the demodulation of FM wave with relevant

mathematical equations. 8M

b) An FM signal with = 1 is transmitted through an ideal bandpass filter with mid-band frequency fc and bandwidth 5fm, where fc is the unmodulated carrier frequency and fm is the frequency of the single-tone modulating wave. Determine the amplitude spectrum of the filter output given: J0(1) = 0.765, J1(1) = 0.44, J2(1) = 0.115

7M

Unit – IV

7. a) Explain the generation of PWM with relevant diagrams. 8M b) A simple lab procedure for measuring noise figure of a 2 port network consists

of following steps: i. First connect resistance at room temperature Toto input and measure

output power ii. Heat the resistor till output power is doubled and record temperature in

degree Kelvin. Let temperature of resistor is Tr. Assuming resistor and power meter are impedance matched to 2 port device. Show that noise figure is F = (Tr/To) – 1

7M

8. a) Analyze the different types of pulse modulation schemes with relevant diagrams.

8M

b) Explain the model of DSBSC receiver using coherent detection and derive the expression for figure of merit.

7M

Unit – V

9. a) Draw the block diagram of AM transmitter and explain function of various blocks. 8M b) In a super heterodyne receiver having no RF amplifier the loaded Q of the antenna

coupling circuit is 90. If the intermediate frequency is 455 KHz, Calculate the image frequency rejection ratio at a signal frequency of 950 KHz.

7M

10. a) Compare the following: i. AM transmitter with FM transmitter ii. AM Receiver with FM Receiver

7M

b) In a broadcast super heterodyne receiver having no RF amplifier, the loaded Q of the antenna coupling circuit (at input the mixer) is 100. If the intermediate frequency is 455KHz, calculate: i. The image frequency and its rejection ratio at 1000KHz ii. The image frequency and its rejection ratio at 25MHz

8M




PULSE AND DIGITAL CIRCUITS




Unit – I

1. a) A pulse is applied to a low pass Circuit. Prove by direct integration that the area under the pulse is the same as the area under the output waveform across the capacitor.

7M

b) A Symmetrical square wave of peak to peak amplitude ‘V’ and frequency ‘f’ is applied to a high pass RC circuit. Show that the percentage tilt is given by

1/2

1/21P 200%

1fRC

fRCe

e

8M

2. a) With a neat circuit diagram, Explain the working of Ringing circuit and derive the expression for Vmax.

7M

b) A 10Hz symmetrical square wave whose peak-to-peak amplitude is 2V is impressed upon a high pass circuit whose lower 3-db frequency is 5Hz. Calculate and sketch the output waveform and what is the peak -to- peak output amplitude.

8M

Unit – II

3. a) With appropriate VI characteristics analyze the piecewise linear characteristics of a diode.

7M

b) Analyze and sketch the output voltage waveform over the input voltage for the circuit shown in the Fig.1 below, given that the input varies linearly from 0V to 150V. Assume ideal diodes.

Fig.1

8M

4. a) With relevant VI characteristics, analyze the functioning of a transistor switch in saturation.

7M

b) Design a diode clamper to restore a dc level of +3 V to an input signal of peak-peak value of 10V. Assume ideal diode.

8M

Unit – III

5. a) With a neat circuit diagram, explain the working of a fixed-bias transistor bistable multivibrator.

7M

b) For a practical emitter coupled astable multivibrator, Vcc = 30 V, R2 = 2R1<< R”, C = 0.1µF, Rc2 = 0.2kΩ, R’ = R” = 1kΩ and Re1 = Re2 = 3.3kΩ. Assuming silicon transistors with hfe = 30, calculate: i. The voltage levels of the waveforms ii. Frequency of oscillations

8M

Cont…2

:: 2 ::

6. a) With a neat circuit diagram, Explain the operation of astable collector coupled

multivibrator. 8M

b) With a neat circuit diagram, Explain the operation of monostable multivibrator.

7M

Unit – IV

7. a) Explain the methods of generating a time-base waveform. 7M b) Design Miller sweep circuit for the following specifications:

Vcc = 10V, Ic = 2mA, hfe (min) = 20, VCE (sat) = 0.3V, VBE (sat) = 0.7, sweep time is 5mS.

8M

8. a) With a neat circuit diagram, explain the operation of a transistor Miller time-base generator.

7M

b) Explain how linearity is improved in a current sweep circuit that uses current feedback.

8M

Unit – V

9. a) With neat circuit diagram, explain the working of a bidirectional diode gate. 7M b) Verify the truth table of RTL NOR logic with two inputs. Construct OR logic using RTL NOR

gates.

8M

10. a) With relevant circuit diagram, analyze the operation of a balanced-transistor chopper pair.

7M

b) Explain the operation of basic TTL NAND gate with neat diagram. 8M




MANAGERIAL ECONOMICS AND FINANCIAL ANALYSIS

(Common to Electronics and Communication Engineering & Mechanical Engineering)



Unit – I

1. a) Depict the critical importance of cross elasticity of demand. 5M b) Elaborate in detail, the functional nature and determinants of market demand.

10M

2. a) Evaluate in detail the statistical methods of demand forecasting with examples. 10M b) Develop 3-day moving average from the following daily sales data:

Date and month Daily sales

(Lakhs of tones)

Jan 1 40

2 44

3 48

4 45

5 53

5M

Unit – II

3. a) What is production function? How does a long run production differ from a short run production function?

6M

b) Explain law of returns to scale using isoquant.

9M

4. a) Bring out the significance of managerial uses of Break-even analysis. 8M b) A firm has a fixed cost of Rs.10,000; selling price per unit is Rs. 5 and variable cost per

unit is Rs. 3. Determine break-even point in terms of volume and units. 7M

Unit – III

5. a) Depict with examples the features of perfect competition. 6M b) Analyze suitably the price output determination Under Monopoly Competition. Explain

Short and long run equilibrium with profit and loss. Illustrate the same with graphs.

9M

6. a) Over the past couple of months, the price of gold has been fluctuating. Some gold investors have started liquidating their holdings in gold. Do you expect a fall in price? Give reasons.

5M

b) Write a note on different pricing strategies adopted by modern companies. 10M

Unit – IV

7. a) What is Working Capital? Explain Gross and Net working Capital. 3M b) What are the different sources of raising Capital? 12M

Cont…2

::2::

8. You are a financial analyst for XYZ Co. Ltd. The director of Capital Budgeting has asked you to

analyze two proposed capital investments, Project P and Q. Each project has a investment of Rs.10,00,000 and the cost of capital for each project is 12%. The projects expected net cash in flows are given in the following table. You are required to: i. Calculate each project’s Pay Back Period ii. Calculate each project’s NPV iii. Calculate each project’s IRR

Expected Net Cash In Flows

Year Project P (in Rs.) Project Q (in Rs.)

1 6,50,000 3,50,000

2 3,00,000 3,50,000

3 3,00,000 3,50,000

4 1,00,000 3,50,000

15M

Unit – V

9. a) Write any five differences between a Trail Balance and a Balance Sheet. 5M b) Explain the concepts of Accounting.

10M

10. From the following particulars, prepare Balance Sheet as on the 31st of October, 2016 of Sri. Mohan Ram and Sons: Current Ratio - 2 Working Capital - Rs. 4,00,000 Capital Block to Current Assets - 3:2 Fixed Assets to turnover - 1:3 Cash sales to Credit Sales - 1:2 Loan to Share Capital - 1:2 Stock Velocity - 2 months Creditors Velocity - 2 months Debtors Velocity – 3 months Gross Profit Ratio – 25% Net Profit – 10% of turnover Reserve – 2.5% of turnover

15M


(AUTONOMOUS)

B. Tech IV Semester Regular Examinations, April - 2017 (Regulations: VCE-R15)

SIGNALS AND SYSTEMS (Electrical and Electronics Engineering)




Unit – I

1. a) Draw z(t)= x(2t).y(2t+1), two continuous time signal are as shown in the Fig.1:

Fig.1

8M

b) Determine and sketch the even and odd components of signal x(t) as shown in Fig.2:

Fig.2

7M

2.

a) Determine whether the system 2k

y t x n n K

is:

i. Linear ii. Time invariant iii. Causal iv. Stable

8M

b) Check whether the following are energy or power signals? Also find the corresponding values:

i. 1 cos 4 4,

0 otherwise

x n n for n

ii. 2 cos 0,

0 otherwise

x n n for n

7M

Unit – II

3. a) Find the discrete time convolution sum for: Y(n)= ẞnu(n)*αnu(n) for |ẞ|<1, |α|<1

8M

b) Find the exponential Fourier series of impulse train δT(t) Shown in Fig.3:

Fig.3

7M

Cont…2

::2::

4. a) Find the compact trigonometric Fourier series for the square periodic signal f(t) and sketch the amplitude and phase:

Fig.4

7M

b) Evaluate the continuous time convolution integral for y(t) if h(t)= e-tu(t) and x(t)=e-3t[u(t)-u(t-2)].

8M

Unit – III

5. a) Find the Fourier Transform of unit step response. 7M b) State and prove the convolution theorem of Fourier Transform.

8M

6. a) Obtain the Fourier transform representation for periodic signal x(t)=sinω0t and draw the spectrum.

7M

b) State and prove the Hilbert transform properties.

8M

Unit – IV

7. a) Determine the Laplace Transforms of the following signals and plot their ROC’s: i. e-atu(t) ii. u(-t) iii. sinω0tu(t)

9M

b) Determine the Inverse Laplace Transform of X(s) given by:

2 2

1

6 11 6X s

s s s

Use partial fraction expansion method.

6M

8. a) Using Convolution theorem of Laplace Transforms, find the output of the system excited by input x(t) = e-2tu(t) and having impulse response h(t)=u(t-3).

5M

b) State the avantages of Laplace transforms over Fourier transforms. State and prove the following properties of Laplace transforms: i. Multiplication in time domain ii. Transform of derivatives

10M

Unit – V

9. a) State and prove sampling theorem. 7M b) A causal system has input x(n) and output y(n). Find the impulse response of system if:

1 1 3

1 2 and y 14 8 4

x n n n n n n n

8M

10.

a) Find the Z transform of 1

102

x n u n u n and find its ROC.

7M

b) Find the inverse Z transform by using partial fraction method:

1 2

2

4 3 3ROC 3

2 3

z zX z Z

z x

8M




CONTROL SYSTEMS

(Electrical and Electronics Engineering)



Unit – I

1. a) Explain the features of open loop and closed loop control system. 6M b) For the mechanical system shown in Fig.1 draw the torque-current analogous network

and write the corresponding equations.

Fig.1

9M

2. a) Explain the classification of control system. 6M b) Determine the transfer function X2(S)/F(S), for the system shown in Fig.2. Assume

B0=B1=B2=B3=K1=K2=M1=M2=1.

Fig.2

9M

Unit – II

3. a) Draw the block diagram for the RC circuit shown in Fig.3, then find V0(s)/Vi(s).

Fig.3

9M

b) Draw the single flow graph for the block diagram shown in Fig.4.

Fig.4

6M

Cont…2

:: 2 ::

4. a) Draw the schematic diagram of a two phase AC servo motor and explain. Draw the

speed torque curve for various control voltages and also represent the two phase servo motor using block diagram.

7M

b) For the system represented by the following set of equations, find the transfer function X(s)/U(s) using SFG technique: i. x = x1 +β3u ii. x1 = -a1x1 + x2 + β2u iii. x2 = -a2x1 + β1u

8M

Unit – III

5. a) Derive the unit step response to a typical second order system. 7M b) A unity feedback system is characterized by the open loop transfer function

G(s) = )12.0)(15.0(

1

SSS. Determine the steady state errors for:

i. Unit step input ii. Unit ramp input iii. Unit acceleration input

8M

6. a) The open loop transfer function of a unity feedback control system is given by

G(s) =)1( STS

K

, where K and T are positive constants. By what factor should the amplifier

gain K be reduced so that the peak overshoot of unit step response of the system is reduced from 75% to 25%.

7M

b) Sketch the root locus for the open loop transfer function of a unity feedback control system given below and determine the value of K for marginal stability.

)3)(1()(

sss

KsG

8M

Unit – IV

7. a) Bring out the advantages and disadvantages of frequency domain analysis of control systems.

6M

b) Using Nyquist stability criterion, investigate the stability of a closed loop system whose

open loop transfer function is given by,

2

1 3

sG s H s

s s

9M

8. a) Write the procedure to draw of polar plot? 5M b) Sketch the bode plot magnitude and phase diagrams for the open loop transfer

functions,

2

10

0.1 1GH s

s s

. Also determine gain and phase margins.

10M

Unit – V

9. a) Explain properties of state transition matrix. 6M

b) Obtain a state model for the system described by 3 2

3 2

4 2 23 3

dy dy dy duy u

dt dt dt dt

where u is the input and y is the output in controllable canonical form.

9M

10. a) Obtain the transfer function of lag compensator. 5M b) A LTI system is given by

1

2

1 2 0

1 3 1

XX t U t

X

Find STM.

10M


(AUTONOMOUS) B. Tech IV Semester End Semester Regular Examinations, April/May - 2017


BASIC MECHANICAL ENGINEERING (Electrical and Electronics Engineering)



Unit – I

1. a) Explain two statements of second law of thermodynamics. 10M b) A cyclic heat engine operates between a source temperature of 8000C and a sink

temperature of 300C. What is the least rate of heat rejection per kW net output of the engine?

5M

2. a) Derive the expression for entropy change in irreversible process. 10M b) A Carnot engine absorbs 200 J of heat from a reservoir at the temperature of the normal

boiling point of water and rejects heat to a reservoir at the temperature of the triple point of water. Find the heat rejected, the work done by the engine and the thermal efficiency.

5M

Unit – II

3. a) If the velocity distribution over a plate is given by u=2/3 y - y2 in which u is the velocity in metre per second at a distance y metre above the plate, determine the shear stress at y=0 and y=0.15m. take dynamic velocity of fluid as 8.63 poises.

8M

b) A plate, 0.025 mm distant from a fixed plate, moves at 60cm/s and requires a force of 2N per unit area i.e., 2N/m2 to maintain this speed. Determine the fluid viscosity between the plates.

7M

4. a) A flat plate of area 1.5X106mm2 is pulled with a speed of 0.4m/s relative to another plate located at a distance of 0.15mm from it. Find the force and power required to maintain this speed, if the fluid separating them is having viscosity as 1 poise.

8M

b) Determine the intensity of shear of an oil having viscosity=1 poise. The oil is used for lubricating the clearance between a shaft of diameter 10cm and its journal bearing. The clearance is 1.5mm and the shaft rotates at 150rpm.

7M

Unit – III

5. a) What is meant by Hydraulic efficiency, Mechanical efficiency, Volumetric efficiency and Overall efficiency of a turbine?

8M

b) Two jets strike the buckets of a Pelton wheel, which is having a shaft power as 15450KW. The diameter of each jet is 200 mm. If the net head on the turbine is 400m, find power available at the nozzle and overall efficiency of the turbine. Take Cv=1.0.

7M

6. a) Define specific speed of a turbine and derive an expression for the same. 10M b) A turbine develops 9000KW when running at 100r.p.m. The head on the turbine is 30m.

If the head on the turbine is reduced to 18m, determine the speed and the power developed by the turbine.

5M

Unit – IV

7. a) What is meant by manometric efficiency, mechanical efficiency and overall efficiency of centrifugal pump?

6M

b) Centrifugal pump is to discharge 0.118 m3/s at a speed of 1450r.p.m against a head of 25m. The impeller diameter is 250mm, its width at outlet is 50mm and manometric efficiency is 75 %. Determine the vane angle at the outer periphery of the impeller.

9M

Cont…2

:: 2 ::

8. a) Derive the expressions for discharge and work done by a single acting reciprocating

pump. 8M

b) A single acting reciprocating pump, running at 50r.p.m, delivers 0.01m3/s of water. The diameter of the piston is 200mm and stroke length is 400mm. Determine the theoretical discharge of the pump, co-efficient of discharge and slip and percentage slip of the pump.

7M

Unit – V

9. a) Derive the general 3-D heat conduction equation in Cartesian coordinate system. 10M b) A cable of 6.5 mm diameter at a temperature of 60 ᵒC is to be insulated by a material

having K = 0.174 W/m ᵒC. Convection heat transfer Coefficient (ho) = 8.722 W/m2ᵒC. The ambient temperature is 20 ᵒC. For maximum heat loss, what is the minimum thickness of insulation and heat loss per meter length? Also find the percentage increase in the heat dissipation too.

5M

10. a) Derive the expressions for temperature distribution and heat transfer in a cylinder under 1-D steady sate condition using general heat condition equation.

10M

b) A gas filled tube has 2 mm inside diameter and 25cm length.The gas is heated by an electrical wire of diameter of 0.05mm located along the axis of the tube. Current and voltage drop across the heating element are 0.5 amps and 4 volts, respectively. If the measured wire and inside tube wall temperature are 175 ᵒC and 150 ᵒC respectively,find the thermal conductivity of gas filling the tube.

5M




ELECTRICAL MACHINES-II (Electrical and Electronics Engineering)



Unit – I

1. a) Explain with suitable sketches the construction of squirrel cage and slip ring induction motor. State the merit and dements of each type.

9M

b) The starting and maximum torques of a 3 phase induction motor is 1.5 times and 2.5 times its full load torque. Determine the percentage change in rotor circuit resistance to obtain a full load slip of 0.03. Neglect stator impedance.

6M

2. a) Describe the constructional features of a double cage induction motor and explain its operation.

6M

b) A 25hp, 6 pole, 50Hz, 3 phase induction motor has stator/rotor phase voltage ratio of 6/5. The stator and rotor impedance per phase are (0.25+j0.75) ohms and (0.173+j0.52) ohms respectively. Find the starting torque exerted by the motor when an external resistance of 1.0 ohm is inserted in each phase, the motor being started directly on the 400 V supply system. Assume Y/Y connections.

9M

Unit – II

3. a) Discuss the method of speed control of induction motor by changing the number of poles.

5M

b) A 30HP, 500V, 50Hz, 4 pole, delta connected cage motor gave the following test data: No Load: 500 V,8 A,1.5 KW Block rotor: 150 V, 50 A, 3.5 KW. Draw the circle diagram and obtain the values of: i. Line current ii. P.F Assume stator resistance and rotor resistance to be equal.

10M

4. a) Why a starter is needed for induction motor? Explain the operation of DOL starter giving its circuit diagram.

8M

b) A 3 phase Induction motor takes a starting current which is five times full load current at normal voltage. Its full load slip is 4%.What auto transformer ratio would enable the motor to be started with not more than twice the full load current drawn from the supply? What would be the starting torque under this condition?

7M

Unit – III

5. a) Explain the constructional features of a 3-φ alternator with neat diagrams. 9M b) A 4 pole alternator has an armature with 25 slots and 8 conductors per slot. The flux per

pole is 0.06wb and machine rotates at 1500rpm. Calculate the EMF generated, if the winding factor is 0.96 and all the conductor in a phase are connected in series.

6M

6. a) Explain how you determine Xd and Xq using slip test. 9M b) Two alternators are working in parallel supplying a lighting load of 300KW and a motor

load of 5MW at 0.8pf lagging. One machine is loaded up to 5MW at 0.9pf lagging. What is the load and power factor of other machine?

6M

Cont…2

:: 2 ::

Unit – IV

7. a) Suggest any one method and hence explain in detail how do you synchronize an alternator with the infinite bus.

6M

b) A 2000V, 3-phase, star connected, 8-pole synchronous motor has impedance per phase equal to (0.4+j6Ω). When the motor runs at no load, the field excitation is adjusted so that Ef (induced emf) is made equal to V. When the motor is loaded, the rotor is retarded by 30 mechanical. Calculate the armature current, power factor and power developed by the motor. What is the maximum power the motor can supply without falling out of step?

9M

8. a) Discuss the application of Synchronous Motors. 6M b) A synchronous motor improves the power factor of a load of 500kW from 0.707 lagging

to 0.95 lagging. Simultaneously the motor caries a load of 100kW. Find: i. The leading kVAr supplied by the motor ii. kVA rating of the motor iii. Power factor at which the motor operates

9M

Unit – V

9. a) Explain why a single phase induction motor has zero starting torque. Explain the operation of single phase induction motor based on double revolving field theory.

8M

b) Explain the construction and principle of working of a universal motor and mention its applications.

7M

10. a) Explain the construction and working principle of the capacitor start induction motor. 8M b) Explain the construction and working principle of the shaded pole induction motor. 7M




POWER SYSTEM GENERATION

(Electrical and Electronics Engineering)



Unit – I

1. a) Explain and draw the single line diagram of the electrical power system. 5M b) A hydro-electric station is supplied from a catchment area of 150km2 with an annual

rainfall of 200cm and effective head of 300 meters. Assume a yield of 60%, calculate: i. The available continuous power ii. The rating of generator installed iii. Net energy available in kwh

10M

2. a) With a neat schematic, explain the operation of a hydro power station. 8M b) Explain how a pumped storages results in overall economy in an interconnected system.

7M

Unit – II

3. a) Explain thermal power station operation with a line diagram. 8M b) Give the classification of steam turbines used in power plants. Briefly discuss their use

and characteristics.

7M

4. a) Explain the following: i. Types of boilers ii. Cooling tower iii. Super heater iv. Economizer

8M

b) What are the advantages and disadvantages of a thermal power station?

7M

Unit – III

5. a) Explain the advantages and disadvantages of nuclear power plants with respect to thermal and hydro power plants.

6M

b) With a neat sketch, explain the working of Gas power plant.

9M

6. a) Explain the open cycle gas power plant and explain its demerits. 7M b) With a neat sketch, explain pressurized water reactor.

8M

Unit – IV

7. a) With neat sketch explain sectionalized single bus bar scheme. 8M b) Explain air insulated substation with diagram.

7M

8. a) With single line diagram, explain substation layout showing the location of all substation equipment.

8M

b) Define substation and explain about indoor and outdoor substation.

7M

Cont…2

:: 2 ::

Unit – V

9. a) Define the following terms: i. Demand factor ii. Load factor iii. Plant capacity factor iv. Plant use factor

8M

b) A 1000MW Power station delivers 1000MW for 2 hours, 500MW for 6 hours and shut down for the rest of each day. It is also shut down for maintenance for 60 days annually. Calculate annual load factor.

7M

10. a) Discuss the various methods for power factor improvement. 7M b) A single phase motor connected to 400V, 50Hz supply takes 31.7A at a power factor of

0.7 lagging. Calculate the Capacitance required in parallel with the motor to raise the Power factor to 0.9 lagging.

8M




HYDRAULIC MACHINES (Mechanical Engineering)



Unit – I

1. a) Obtain an expression for the force applied on a stationary vertical plate. 7M b) A 65mm diameter jet moving at 25m/s impinges on a series of flat vanes mounted on

large wheel. If the velocity of the vane is 6.5m/s, find the force exerted by the jet, work done per second and the hydraulic efficiency.

8M

2. a) Explain the concepts of velocity triangles by considering a jet striking an unsymmetrical moving curved vane tangentially at one of the tips.

7M

b) A 150mm diameter jet moving at 30m/s impinges on a curved vane moving at 15m/s in

the direction of the jet. The jet leaves the vanes at 60o with the direction of motion of the

vanes. Calculate:

i. Force exerted by the jet in the direction of motion of vanes

ii. Work done by the jet per second

8M

Unit – II

3. a) Draw a general layout of hydroelectric power plant using an impulse turbine. 7M b) A Pelton wheel is to be designed for a head of 60m when running at 200r.p.m. The Pelton

wheel develops 95.6475 kW shaft power. The velocity of the buckets= 0.45 times the velocity of the jet, overall efficiency = 0.85 and co–efficient of the velocity = 0.98.

8M

4. a) What is a draft-tube? Why is it used in a reaction turbine? Describe with neat sketch two different types of draft tubes.

6M

b) A Kaplan turbine working under a head of 20m develops 11772kW shaft power. The outer diameter of the runner is 3.5m and hub Diameter is 1.75m. The guide blade angle at the extreme edge of the runner is 350. The hydraulic and overall efficiencies of the turbine are 88% and 84% respectively. If the velocity of whirl is zero at outlet, Determine: i. Runner vane angles at inlet and outlet at the extreme edge of the runner ii. Speed of the turbine

9M

Unit – III

5. a) Define specific speed of a turbine? Derive an expression for the specific speed and its significance.

7M

b) A turbine is to operate under a head of 25m at 200r.p.m. The discharge is 9cumec. If the efficiency is 90%, determine the performance of the turbine under a head of 20meters.

8M

6. a) Obtain the expression for effect of the acceleration in suction pipe on the pressure head in the cylinder.

7M

b) A single acting reciprocating pump, running at 50r.p.m., delivers 0.01m3/s of water. The diameter of the piston is 200mm and stroke length 400mm. Determine: i. The theoretical discharge of the pump ii. Co-efficient of discharge iii. Slip and the percentage of slip

8M

Cont…2

:: 2 ::

Unit – IV 7. a) What do you mean by minimum starting speed of a centrifugal pump and obtain the

expression for the same? 7M

b) A centrifugal pump is installed at a site where the atmospheric pressure and temperature are 100kpa and 35oC respectively. The pump has a maximum flow rate of 0.04m3/s of water. The suction pipe of diameter 10cm is 8m long. The friction factor of the pipe is 0.005. The resistance of the foot valve and other pipe fittings together is equivalent to 2m length of the suction pipe. Determine the max length above the water level in the sump, where the pump can be installed. If the pump is actually insulated, 2.5m above the sump water level, find NPSH?

8M

8. a) What is priming? Why is it necessary? 7M b) The diameter of an impeller of a centrifugal pump at inlet and outlet are 30cm and 60cm

respectively. The velocity of flow at outlet is 2.0m/s and the vanes are set back at an angle of 450 at the outlet. Determine the minimum starting speed of the pump if the manometric efficiency is 70%.

8M

Unit – V

9. a) Illustrate hydraulic intensifier with a neat sketch. 7M b) Water is supplied to a hydraulic crane at a pressure of 5N/mm2, in order to lift a 45kN

load through a height of 10meters. If the efficiency of the crane id 55% find the volume displaced by the ram and also the diameter of the ram if ram stroke is 5 times the diameter.

8M

10. a) Illustrate the working of a gear pump. 8M b) The plunger of an accumulator is 400mm in diameter and weighs 52kN. Calculate the

additional weight which has to be placed over it to develop a pressure of 5N/mm2. 7M




THERMAL ENGINEERING-I (Mechanical Engineering)



Unit – I

1. a) What are the important basic components of an IC engine? Explain them briefly. 5M b) In what respect four stroke CI engine differ from that of an SI engine.

10M

2. a) For a CI engine, compare with the help of a diagram the actual cycle with the limited pressure fuel-air cycle.

5M

b) Show and compare the effect of spark advance on a single p-v diagram. What do you mean by progressive burning? What are the factors on which the time of progressive burning depends?

10M

Unit – II

3. a) Explain the terms controlled, uncontrolled and abnormal combustion. 5M b) How does the nucleus of a flame grow and how does the combustion proceed? Also

distinguish between combustion and burning. List the factors that affect the octane requirement of an engine.

10M

4. a) Define the terms: i. Ignition lag ii. After burning

5M

b) Show and explain with reasons the variation of pressure and temperature in the SI engine as a function of crank angle. Discuss the effect of compression ratio on ignition lag.

10M

Unit – III

5. a) What is the need for measurement of speed of an I.C engine? 3M b) An eight-cylinder four stroke engine of 9cm bore and 8cm stroke with a compression

ratio of 7 is tested at 4500rpm on a dynamometer which has 54cm arm. During a 10 minutes test the dynamometer scale beam reading was 42kg and the engine consumed 4.4kg of gasoline having a calorific value of 44000kJ/kg. Air at 270C and 1 bar was supplied to the carburetor at the rate of 6kg/min. Find: i. The brake power delivered ii. The brake mean effective pressure iii. The brake specific fuel consumption iv. The brake specific air consumption v. The brake thermal efficiency vi. Volumetric efficiency

12M

6. a) Schematically explain heat balance of an IC engine. 5M b) A four stroke, four-cylinder gasoline engine has a bore of 60mm and a stroke of 100mm.

On a test it develops a torque of 66.5Nm when running at 3000rpm. If the clearance volume in each cylinder is 60cc the relative efficiency with respect to brake thermal efficiency is 0.5 and the calorific value of the fuel is 42MJ/kg. Determine the fuel consumption in kg/hr and the brake mean effective pressure.

10M

Cont…2

::2::

Unit – IV

7. a) Explain what is meant by volumetric efficiency of a compressor. Explain how clearance volume effects it. Discuss the effects of clearance upon the performance of an air compressor.

7M

b) A three stage air compressor delivers 5.2m3 of free air per minute. The suction pressure and temperature are 1 bar and 300C. The ambient pressure and temperature are 1.03bar and 200C. The air is cooled at 300C after each stage of compression. The delivery pressure of the compressor is 150bar. The rpm of the compressor is 300. The clearances of L.P, I.P, and H.P cylinders are 5% of the respective strokes. The index of compression and re-expansion in all stages is 1.35. Neglecting pressure losses, find the B.P of the motor required to run the compressor if the mechanical efficiency is 80%.

8M

8. a) What factors limit the delivery pressure in a reciprocating compressor? 8M b) In test a test of a single cylinder, single acting air compressor having 100mm bore and

125mm stroke, air is taken from atmosphere at 1.013bar and delivered through a valve, which maintains a delivery pressure of 800kN/m2 to a reservoir of 1.2m3 capacity. A motor giving 1.765KW drives the compressor at 422rpm and indicated mean effective pressure is 220kN /m2. The reservoir is initially at atmospheric pressure and 200C and after 20 minutes running reaches 70kN/m2 and 670C. Calculate the delivery in m3 of free air per minute at 200C, the volumetric efficiency at atmospheric conditions, the isothermal efficiency and the mechanical efficiency.

7M

Unit – V

9. a) Compare centrifugal and axial flow air compressors. 5M b) A centrifugal compressor operating at a pressure ratio of 4:1 has inlet temperature of

150C. Calculate the outer diameter of impeller given that the speed of operation 15000r.p.m. Slip factor=0.9, Power input factor =1.03, Isentropic efficiency=0.85.

10M

10. a) Discuss the losses in axial flow compressors. 5M b) An axial flow compressor stage consisting of a rotating and stationary blade row receives

air at 100kN/m2 and 150C. The axial velocity of air is 200 m/s. Inlet and exit blade angles of rotor row are 500 and 220 respectively. Assuming degree of reaction to be 50%, calculate the power required if the air compressed to 1.2kg/s.

10M




PRODUCTION TECHNOLOGY-I

(Mechanical Engineering)



Unit – I

1. a) Define pattern and explain in detail the different types of pattern allowances. 7M b) With a flow chart indicate and explain the different activities involved in casting process.

8M

2. a) Describe the process of investment casting with a neat sketch and state its advantages and applications.

7M

b) What is a Riser? List the functions of Riser in metal casting. Sketch the difference between Open and blind Riser.

8M

Unit – II

3. a) With a neat sketch illustrate the operation of flux cored arc welding process and state its advantages.

8M

b) Explain the process of Resistance Seam welding with a neat sketch and list its advantages.

7M

4. a) Illustrate the gas welding operation and give details about different flames used in gas welding process.

8M

b) Explain the process of Thermit welding with a neat sketch and state its applications. 7M

Unit – III

5. a) Differentiate between TIG and MIG welding operations. 6M b) Describe the operation of laser welding with illustration and states its advantages and

applications.

9M

6. a) List the welding defects and explain causes and remedies of the same. 7M b) Define HAZ. Describe the metallurgical changes related to welding with a neat sketch. 8M

Unit – IV

7. a) Explain the concept of strain hardening effect in cold working. 7M b) Describe the types of roll mills with illustration.

8M

8. a) Explain the concept of impression die forging with a neat sketch and state its advantages and applications.

8M

b) With the help of a neat sketch explain the drop forging process. 7M

Unit – V

9. a) List the types of extrusion. Explain with neat sketches direct extrusion. 7M b) What is impact extrusion? Briefly describe the process with a neat sketch and its

applications.

8M

10. a) Explain why lubrication is important in hot extrusion process. 7M b) With a neat sketch explain injection moulding process. What are its advantages? 8M




KINEMATICS OF MACHINERY (Mechanical Engineering)



Unit - I 1. a) Differentiate between the following:

i. Completely constrained and successful constrained ii. Open pair and closed pair iii. Structure and kinematic chain

9M

b) Draw a neat sketch of kinematic pair which is classified based on the nature of relative motion between the elements.

6M

2. a) What is kinematic chain? List out the different types of kinematic chain. Explain with neat sketch of beam engines.

8M

b) Write the line diagram with neat sketch of oscillating cylinder engine mechanism.

7M

Unit – II

3. a) Prove that a point on one of links of a hart mechanism traces a straight line on the movement of its links.

7M

b) What is a pantograph? Show that it can produce paths exactly similar to the ones traced out by a point on a link on an enlarged or a reduced scale.

8M

4. a) The crank of a slider crank mechanism is 480mm long and rotates at 20rad/sec in the counter clockwise direction. It has a connecting rod of 1600mm long. Determine the following when the crank is at 60ofrom the inner dead center: i. Velocity of slider ii. Angular velocity of connecting rod iii. The position and velocity of a point P on the connecting rod having least absolute

velocity

8M

b) A four bar mechanism ABCD is made up of four links, pin jointed at the ends AD is a fixed link which is 180mm long. The links AB, BC and CD are 90mm, 120mm and 120mm long respectively. At certain instant, the link AB makes an angle of 60o with the link AD. If the link AB rotates a uniform speed of 100rpm clockwise determine: i. Angular velocity of links BC and CE ii. Angular acceleration of the links CD and CB

7M

Unit – III

5. Explain Klein’s construction for slider crank mechanism to find velocity and acceleration.

15M

6. a) What is mean by steering gear? Write about Davis steering gear. 7M b) Two shafts are connected by a Hooke’s joint. The driving shaft is rotating at a uniform

speed of 1000r.p.m Find the greatest permissible angle between the axes of the two shafts so that the total fluctuation of speed does not exceed 90r.p.m.

8M

Cont…2

:: 2 ::

Unit – IV

7. Draw the profile of a cam operating a knife-edge follower when the axis of the follower passes through the axis of cam shaft from the following data: Follower to move outwards through 30 mm during 600 of cam rotation, Follower to dwell for the next 450 Follower to return to its original position during next 900, Follower to dwell for the rest of cam rotation. The displacement of the follower is to take place with S.H.M during both the outward and return strokes. The least radius of the cam is 30mm. If the cam rotates at 300r.p.m, determine the maximum velocity and acceleration of the follower during outward stroke and return stroke.

15M

8. a) Derive an expression for centrifugal tension in a belt. 8M b) An open-belt drive connects two pulleys 120cm and 50cm diameters, on parallel shafts

4m apart. The maximum tension in the belt is 1900N. The co-efficient of friction is 0.3. The driver pulley of diameter 120cm runs at 200r.p.m Calculate the power transmitted and torque on each shaft.

7M

Unit – V

9. a) Derive an expression for the minimum number of teeth required on the pinion in order to avoid interference in involute gear teeth.

7M

b) Two 20o involute spur gears have a module of 10mm. The addendum is equal to one module. The larger gear has 40 teeth while the pinion has 20 teeth. Will the gear interfere with the pinion?

8M

10. a) Propose a gear train arrangement for a watch mechanism where hour and minute needles are to be mounted on the same axis. Draw a neat sketch and explain.

5M

b) In a reduction gear shown in Fig.1, the input S has 24 teeth. P and C constitute a compound planet having 30 and 18 teeth respectively. Find the ratio of reduction gear. Assume A to be fixed.

Fig.1

10M




CONCRETE TECHNOLOGY

(Civil Engineering)



Unit – I

1. a) List different types of laboratory tests conducted on cement and discuss about the Soundness test.

8M

b) What is hydration of cement? What are the factors effecting the process of hydration?

7M

2. a) Explain the classification and functions of various chemical admixtures with example of each admixture.

7M

b) Discuss the fresh and hardened state properties of concrete that are affected by texture, shape, size and grading of aggregate.

8M

Unit – II

3. a) Briefly explain the steps involved in the manufacture of concrete? 7M b) Discuss the factors effecting workability and the factors affected by workability.

8M

4. a) Differentiate between true slump, shear slump and collapse slump, with sketches. 7M b) Discuss the applicability of various workability tests for different mixes.

8M

Unit – III

5. a) What is Gel Space Ratio? Determine the Gel space ratio of OPC of 300gm for full hydration and partial Hydration of 60% and compare their results?

8M

b) Specify the relationship between water cement ratio and maturity concept with the strength properties of concrete?

7M

6. a) Distinguish between destructive and non destructive testing of concrete? Explain with neat sketch one of the method of NDT of concrete?

8M

b) Explain the following term with respect to strength of concrete: i. Young’s modulus of concrete ii. Poisons ratio

7M

Unit – IV

7. Design a concrete mix by BIS guidelines for the following requirements: Characteristic strength at 28 days : 30 MPa Degree of supervision is good Maximum nominal size of the aggregate : 20mm Slump required at the site : 100 mm Fine aggregate used is river sand and conforms to Zone II Maximum w/c ratio from durability is 0.55 Specific gravity of cement, fine aggregate, coarse aggregate and chemical admixture (SP) used are 3.07,2.62,2.72 and 1.08 respectively. Minimum cement is 300kg/m3 and maximum cement is 450 kg/m3. Coarse aggregate is crushed angular aggregate. (Assume suitable values) Additionally you can also use the values observed in the laboratory for compressive strength and w/c ratios as given below to get the appropriate w/c ratio. Consider the aggregates in SSD condition:

Fck (MPa) 20 22 27 30 36 43 50 60

w/c ratio 0.60 0.55 0.50 0.45 0.40 0.35 0.30 0.27

15M

Cont…2

:: 2 ::

8. a) List out and explain the factors affecting the mix proportioning of concrete. 7M b) What do you understand by durability of concrete? Explain carbonation and sulphate

attack in concrete and the remedial measures for sulphate attack.

8M

Unit – V

9. a) Write short on: i. Self compacted concrete ii. Polymer concrete

7M

b) As a engineer at site suggest a suitable concrete to be used for an industrial flooring. Also enlist its properties as a material of construction.

8M

10. a) Differentiate between structural light weight concrete and normal weight concrete. 7M b) Write in detail about the types of Fiber Reinforced Concrete(FRC). 8M




STRENGTH OF MATERIALS-II (Civil Engineering)



Unit – I

1. a) Mention the assumptions in theory of pure torsion. 5M b) Determine the diameter of a solid shaft which will transmit 330kW at 300rpm. The angle

of twist must not exceed 1degree in 2m length nor the maximum shear stress 40MN/m2. Modulus of rigidity C=84GN/m2.

10M

2. a) Distinguish between proof load, proof stress and proof resilience 5M b) A closed coiled spring is to be made of wire 5mm diameter for which E=200GPa and

C=80GPa it is required to extend to 28mm for an axial load of 100N and twist 0.22 radians for an axial couple of 1Nm. Find the mean diameter of the coils and number of coils required.

10M

Unit – II

3. a) Derive the formula for Euler’s buckling load of a column with both ends fixed. 7M b) Calculate the safe compressive load on a hollow cast iron column (one end rigidly fixed

and other hinged) of 15cm external diameter, 10cm internal diameter and 10m in length. Use Euler’s formula with factor of safety of 5 and E=95kN/mm2.

8M

4. a) A mild steel T-section having width of web as 150mm and depth of section 150mm, has uniform 10mm thickness of web and flange. This section is used as a strut, 4m long with both ends fixed. Determine, by Rankine’s formula, the safe load it can carry with a factor of safety of 3. Take fc=330N/mm2 Rankine’s constant 1/7500.

7M

b) Determine the maximum stress induced in a horizontal strut of length 2.5m and of rectangular cross section 40mm wide and 80mm deep when it carries an axial thrust of 150kN and a vertical load of 6kN/m length. The strut is having pin joints at its ends. Take E=2X105N/mm2.

8M

Unit – III

5. a) Define core of a section. Derive expression for core of circular section. 7M b) A masonry chimney 24m high of uniform circular section, 3.5m external diameter and 2m

internal diameter is subjected to a horizontal wind pressure of 1kN/m2 of projected area. Find the maximum and minimum stress intensities at the base, if the specific weight of masonry is 22kN/m3.

8M

6. a) What is middle third rule? Explain stability condition of masonry dam. 7M b) A masonry dam is 1m wide at the top, 4m wide at base and 6m high. The face of the wall

exposed to water is vertical and water is likely to rise to the top of the wall. Find the maximum and minimum intensities of normal stress intensities at the base, if the specific weight of masonry is 22kN/m3 and that of water is 9.8kN/m3.

8M

Cont…2

:: 2 ::

Unit – IV

7. A beam of T section (flange 100x200mm, web 150x10mm) is 3m in length and is simply supported at the ends. It carries a load of 5kN inclined at 200 to the vertical passing through the centroid of the section. If E= 210GPa, calculate: i. Maximum tensile stress ii. Maximum compressive stress iii. Deflection due to load iv. Position of the neutral axis

15M

8. a) Write the computational procedure for the deflection of the beam due to unsymmetrical bending.

5M

b) A channel section has flanges 100x10mm and web 160x10mm, determine the shear center of the channel.

10M

Unit – V

9. a) Define circumferential strain, longitudinal strain and volumetric strain. 6M b) A cylindrical shell is 3m long, 1m internal diameter and 15mm metal thickness. Calculate

the intensity of shear stress induced and also the changes in the dimensions of the shell, if it is subjected to an internal pressure of 1.5N/mm2. Take E=0.204X106N/mm2 and 1/m= 0.3.

9M

10. a) Explain Lame’s theorem relating to thick cylinder and state assumptions made in this theory.

5M

b) A compound cylinder, formed by shrinking one tube on to another is subjected to an internal pressure of 60N/mm2. Before the fluid is admitted, the internal and external diameter of the compound cylinder is 120mm and 200mm and the diameter at the junction is 160mm. If after shrinking on, the radial pressure at the common surface is 8N/mm2. Calculate the final stresses set up in the cylinder.

10M




STRUCTURAL ANALYSIS-I (Civil Engineering)



Unit - I 1. a) Define perfect, deficient and redundant frames with neat sketches. 5M b) Using method of joints, determine the stresses in all the members of the truss as shown

in Fig.1 below.

Fig.1

10M

2. a) State the assumptions in method of sections. 5M b) Determine the forces in the members FE, FD, CD of the truss shown in Fig.2 by method

of sections

Fig.2

10M

Unit – II

3. a) Derive the expression for strain energy due to axial force and bending. 5M b) A simply supported beam of span 6metres is subjected to a concentrated load of 45kN

at 2metres from the left support, calculate the deflection under the load. Take E=200x106N/m2 and I=14x10-6 m4

Fig.3

10M

Cont…2

:: 2 ::

4. a) Draw neat sketches of Three hinged and two hinged arches with usual notations and reactions.

5M

b) A parabolic 3-hinged arch carries loads as shown in Fig.4 below. Determine the resultant reactions at supports. Find the B.M, Normal thrust and radial shear at D, 5metres from A. What is the maximum bending moment?

Fig.4

10M

Unit – III

5. A beam AB of uniform section is 6m span fixed at the ends a UDL of 30kN/m runs over left half of the span and there is an additional concentrated load of 40kN at the right quarter span determine the end moments and the reactions sketch neatly the BMD and SFD.

15M

6. A propped cantilever beam ABC of span 3m, fixed at A and propped at C it is subjected to UDL 10kN/m over the span AC and also it is subjected to a central concentrated load of 5kN at center of the span B and assume EI is constant throughout the span. Analyze and draw SFD and BMD.

15M

Unit – IV

7. a) Write the step - by- step procedure in slope deflection method. 5M b) Analyze the beam loaded as shown in the figure below by slope deflection method.

Draw B.M.D and S.F.D. EI is constant.

Fig.5

10M

8. A continuous beam ABCD 20 meters long is simply supported at its ends. If the support B sinks by 10 mm, analyze the beam by Moment Distribution method. Sketch the B.M.D. Take E=2.1X105N/mm2 and I=85X105mm4

Fig.6

15M

Cont…3

:: 3 ::

Unit – V

9. a) Draw ILD for the following forces of simply supported beam AB: i. Reaction at A ii. SF at section X

5M

b) Two wheel loads of 160kN (leading loads) and 400kN spaced 2metres apart move on a simply supported beam girder of span 16metres from left to right. Find the maximum positive and negative shear force at a section: i. 4 metres from the left end ii. 6 metres from the left end

10M

10. A simply supported beam of span 20m is subjected to a set of loads of magnitude 20kN, 30kN,15kN spaced at 1.5m, 2m and 1m moving from left to right with 10kN leading the spacing between 10kN and 15kN in the above loading system is 1m. determine the maximum BM at a section 5m from the left and also the absolute BM developed in the beam.

15M




HYDRAULICS AND HYDRAULIC MACHINES (Civil Engineering)



Unit – I

1. a) What are the different types of flows in open channels? Explain in detail. 8M b) A trapezoidal channel has side slopes of 1 horizontal to 2 vertical and the slope of the bed

is 1 in 2000. The area of the section is 42m2. Find the dimensions of the section if it is most economical. Determine the discharge of the most economical dimensions if C=60.

7M

2. a) Derive an expression for the variation of depth along the length of the bed of the channel for gradually varied flow in an open channel. State clearly all the assumptions made.

8M

b) The discharge of water through a rectangular channel of width 8m, is 15m3/s when depth of flow is 1.2m. Calculate: i. Specific energy of the flowing water ii. Critical depth and critical velocity iii. Value of minimum specific energy

7M

Unit – II

3. a) State and explain the Buckingham’s -theorem. 7M b) The resisting force R of a supersonic plane during flight can be considered as dependent

upon the length of the aircraft 1, velocity V, air viscosity , air density and bulk

modulus of air K. Express the functional relationship between these variables and the resisting force.

8M

4. a) Explain the three hydraulic similarities that must exist between a prototype and its model.

8M

b) Define the following non-dimensional numbers. What are their significances for fluid flow problems? i. Reynold’s number ii. Froude’s number iii. Mach’s number

7M

Unit – III

5. a) A jet of water of diameter 20 mm strikes a 200 mm x 200 mm square plate of uniform thickness with a velocity of 10 m/s at the centre of the plate which is suspended vertically by a hinge on its top horizontal edge. The weight of the plate is 98 N. The jet strikes normal to the plate. i. Estimate the force to be applied at the lower edge of the plate so that the plate is

kept vertical ii. If the plate is allowed to deflect freely, estimate the inclination of the plate with

vertical due to the force exerted by the jet of water

7M

b) Water is flowing through a pipe at the end of which a nozzle is fitted. The diameter of the nozzle is 100 mm and the head of water at the centre of the nozzle is 100 m. Find the force exerted by the jet of water on a fixed vertical plate. The coefficient of velocity is given as 0.95.

8M

Cont…2

:: 2 ::

6. a) Derive an expression for the force exerted by a jet of water on moving inclined plate in the direction of jet.

7M

b) A jet of water moving at 12m/s impinges on a concave shaped vane to deflect the jet through 120o when stationary. The vane is moving at 5m/s. Estimate: i. The angle of the jet so that there is no shock at inlet ii. The absolute velocity of the jet at exit both in magnitude and direction iii. The work done per second per N of water. Assume the vane is smooth

8M

Unit – IV

7. a) Explain with neat sketches the working of a Francis turbine. Also explain the purpose of draft tube.

8M

b) A Pelton wheel turbine has a mean bucket speed of 12m/s with a jet of water flowing at the rate of 900 lps under a head of 40m. The buckets deflect the jet at an angle of 165o. Calculate the power given by water to the runner and the hydraulic efficiency of the turbine. Assume the coefficient of velocity as 0.96.

7M

8. a) Explain what is meant by unit quantities in turbines. Derive expressions for unit speed, unit discharge and unit power of a turbine.

8M

b) The quantity of water available for a hydroelectric station is 275m3/s, under a head of 18m. Assuming the speed of the turbine to be 150rpm, and their efficiency 82%, determine the number of turbines required if: i. A Francis turbine whose specific speed must not exceed 395rpm ii. Kaplan turbine whose specific speed must not exceed 690 are chosen

7M

Unit – V

9. a) Define a centrifugal pump. Explain the working of a single-stage centrifugal pump with sketches.

8M

b) Define specific speed of a centrifugal pump. Derive an expression for the same.

7M

10. a) Explain the classification of Hydropower plants in detail. 8M b) The internal and external diameters of the impeller of a centrifugal pump are 200mm

respectively. The pump is running at 1200r.p.m. The vane angles of the impeller at inlet and outlet are 200 and 300 respectively. The water enters the impeller radially and velocity of flow is constant. Determine the work done by the impeller per unit weight of water.

7M




BUILDING PLANNING AND DRAWING (Civil Engineering)



Unit – I

1. a) What is FAR? Explain with examples. 7M b) Explain the principles underlying building byelaws.

8M

2. a) Discuss how building byelaws emphasis on lighting and ventilation requirements and its importance.

8M

b) Discuss about the height restrictions regulation imposed by building byelaws.

7M

Unit – II

3. a) Give requirements for Bed room and Dining room in a residential building. 8M b) What are the minimum planning standards of Banks and Hospitals?

7M

4. a) Explain about planning of Hotels and Motels. 7M b) Explain the planning of buildings for Recreation.

8M

Unit – III

5. a) Explain the different methods of scheduling. 8M b) Explain how bar charts can be used in construction planning.

7M

6. a) Explain the salient features of PERT. 8M b) Discuss the terms:

i. Total float ii. Free float iii. Critical path

7M

Unit – IV

7. a) Draw a neat sketch of a queen post truss and indicates the parts. 8M b) Draw to a suitable scale, elevation and section of a paneled window of suitable size.

7M

8. a) Draw the Plan of one and half brick wall odd and even courses and elevation of English Bond.

7M

b) Draw the conventional signs for the following: i. Stone ii. Wood iii. Glass iv. Sand filling

8M

Cont…2

:: 2 ::

Unit – V

9. From the line diagram shown in Fig.1 draw to a suitable scale the plan and elevation of the building.

Fig.1

15M

10. From the line diagram shown in Fig.2, draw to a suitable scale the plan and section of the building showing all details.

Fig.2

15M




SURVEYING-II (Civil Engineering)



Unit – I

1. a) Explain how you would measure horizontal and vertical angles with a theodolite. 7M b) Explain the procedure for setting out the culvert.

8M

2. a) Enlist the sources of errors in a theodolite survey. 7M b) From the records available from survey notes, it is observed that the lengths of two lines

were not readable. From the available data given below, find the lengths of two sides:

Line Length(m) Bearing

PQ 178.60 S520 30’E

QR 228.40 N480 45’E

RS Missing N180 15’W

ST Missing S780 30’W

TP 238.80 S320 30’W

8M

Unit – II

3. a) What is trigonometrical leveling? How do you find the elevation of an object whose base is inaccessible when the instrument axes are at the same level along with a sketch?

7M

b) Determine the Reduced level of a top of tower from the following observations:

Instrument station

Vertical angle elevation

Reading on B.M with Horizontal line of sight

A +16°42’ 1.73m

B +13°38’ 2.23m

Distance between A and B is 100m. RL of B. M is 168.270m. A and B are not in the same plane with the top of tower. Horizontal angle at A between B and top of tower is 73°44’. Horizontal angle between A and top of tower at B is 52°08’.

8M

4. a) With a sketch demonstrate the theory of stadia tachometry. 8M b) A tachometer was set up at a station C and the following readings were obtained on a

vertically held staff. Calculate the distance CD and RL on D, when constants of the instrument are 100 and 0.15. RL of B. M=750.000m.

Inst station

Staff station

Vertical angle

Hair readings

C B.M -5°20’ 1.150,1.800,2.450

C D +8°12’ 0.750, 1.500, 2.250

7M

Unit – III

5. a) List the different types of curves and illustrate them with neat sketches. 7M b) Determine the offsets to be set out at ½ chain interval, along the tangents to locate a 16

chain curve, the length of each chain being 20m.

8M

6. a) Explain the procedure of setting a simple curve by the successive bisection of chords. 7M b) Two tangents intersect at chainage 59+60, the deflection angle being 50:30’. Calculate

the necessary data for setting out a curve of 15 chains radius to connect the two tangents if it is intended to set out a curve by the offsets from chords. Take peg interval equal to 100 links. Length of the chain being 20metres (100 links).

8M

Cont…2

:: 2 ::

Unit – IV

7. a) With a neat sketch explain the reverse curve for parallel straight lines. 8M b) List and explain the types of a transition curve.

7M

8. a) Write types of vertical curves with neat sketches. 7M b) A vertical parabolic curve 120m long is introduced to connect two grades -1.5% and

+1.5%. Reduced level of the point of intersection is 300m and its chainage is 550m. Calculate the elevation of points on the curve at 20m interval by tangent correction method.

8M

Unit – V

9. a) What is remote sensing? Explain the elements in remote sensing. 8M b) Define Geographical Information System? Demonstrate components of GIS.

7M

10. a) Define GPS. What are the three types of segments? Explain its purpose. 8M b) Explain the working principle of total station. List any three advantages and three

disadvantages of total station. 7M

Documents

PRINCIPLES OF PROGRAMMING LANGUAGES - vardhaman.org · 3. a) Discuss Implementation of Array in detail. 5M b) Discuss the concept of Binding, and Binding types with a simple example