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Code No: R22032
II B. Tech II Semester Supplementary Examinations May/June - 2015
KINEMATICS OF MACHINERY (Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
Provide Figures Wherever Necessary
~~~~~~~~~~~~~~~~~~~~~~~~~~~
1. a).Define Grashof’s law. State how it is helpful in classifying the four link mechanisms into
different types.
b).The length of the fixed link of a crank and slotted lever mechanism is to 50mm and that
of the crank is 100mm. Determine the i) inclination of the slotted lever with the vertical in
the extreme position. ii) Ratio of the time of cutting stroke to the time of return stroke and
iii) Length of the stroke, if the length of the slotted lever is 450mm and the line of stroke
passes through the extreme positions of the free end of the lever.
2. A circle with EQI as diameter has a point Q on it circumference. P is a point on EQ produced
such that if Q turns about E, EQ. EP is constant. Prove that P moves in a straight line
perpendicular to EQI
3. a).Explain the procedure to construct Klein’s construction to determine the velocity and
acceleration of a slider-crank mechanism.
b).In a slider crank mechanism, the lengths of the crank and the connecting rod are 200mm and
800 mm respectively. Locate all the I centers of the mechanism for the position of the
crank when it has turned 300 from the inner dead center. Also, find the velocity of the
slider and the angular velocity of the connecting rod if the crank rotates at 40 rad/s.
4. a).What is fundamental equation of steering gears which steering gear fulfills this condition?
b).Determine the maximum permissible angle between the shaft axis of a universal joint if
the driving shaft rotates 800rpm and the total fluctuations of speed does not exceed 60rpm.
Also, find the maximum and minimum speed of the driven shaft.
5. A cam is to give the following motion to a knife-edged follower: To raise the follower through
30 mm with uniform acceleration and deceleration during 1200 rotation of the cam, Dwell for
next 300 of the cam rotation, To lower the follower with SHM during next 90
0 rotation of the
cam, Dwell for the rest of the cam rotation. The cam has a minimum radius of 30 mm and rotates
counter-clockwise at a uniform speed of 800 rpm. Draw the profile of the cam if the line of
stroke of the follower passes through the axis of the cam shaft. Also, draw the displacement,
velocity and the acceleration diagrams for the motion of the follower for one complete revolution
of the cam indicating main values.
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Code No: R22032
6. The number of teeth on the gear and pinion of two spur gears in mesh are 30 and 18 respectively.
Both the gears have a module of 6 mm and a pressure angle of 200. If the pinion rotates at 400
rpm, what will be the sliding velocity at the moment the tip of the tooth of pinion has contact
with gear flank? Take addendum equal to one module. also, find the maximum velocity of
sliding.
7. What is the effect of centrifugal tension on the tight and slack sides of a belt drive? Show that it
is independent of the tight and slack side tensions and depends only on the velocity of the belt
over the pulley.
8. In a sun and planet gear train, the sun gear wheel having 60 teeth fixed to the frame. Determine
the number of teeth on the planet and annulus wheel s if the annulus rotates 130 times and the
arm rotates 100 times, both in the same direction.
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R10 SET - 1
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Code No: R22032
II B. Tech II Semester Supplementary Examinations May/June - 2015
KINEMATICS OF MACHINERY (Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
Provide Figures Wherever Necessary
~~~~~~~~~~~~~~~~~~~~~~~~~~~
1. a) How are the whit-worth quick return mechanism and crank and slotted lever
mechanism different from each other?
b) A Crank rocker mechanism has a 70 mm fixed link, a 20mm crank, a 50mm coupler, and
70mm rocker. Draw the mechanism and determine the maximum and minimum values of
the transmission angle. Locate the two toggle positions and find the corresponding
crank angles and transmission angles.
2. How can we ensure that a Tchebicheff mechanism traces an approximate straight line. Prove?
3. In a simple steam engine, the lengths of the crank and the connecting rod are 100mm and 400
mm respectively. The weight of the connecting rod is 50 kg and its center of mass is 22o mm
from the cross head center. The radius of gyration about the center of mass is 120 mm. if the
engine speed is 300 rpm, determine for the position when the crank has turned 450 from the inner
dead center, i) the velocity and acceleration of the center of mass of the connecting rod ii) the
angular velocity and acceleration of the rod iii) the kinetic energy of the rod
4. a).Sketch a polar velocity diagram of a Hooke’s joint and mark its salient features.
b).The ratio between the width of the front axle and that of the wheel base of a steering
mechanism is 0.44. At the instant when the front inner wheel is turned by 180, what
should be the angle turned by the outer front wheel for perfect steering
5. A flat faced mushroom follower is operated by a uniformly rotating cam. The follower is raised
through a distance of 25 mm in 1200 rotation of the cam, remains at rest for the next 30
0 and is
lowered during further 1200 rotation of the cam. The raising of the follower takes place with
cycloidal motion and the lowering with uniform acceleration and deceleration However, the
uniform acceleration is 2/3 of the uniform deceleration. The least radius of the cam is 25mm
which rotates at 300 rpm. Draw the cam profile and determine the values of the maximum
velocity and maximum acceleration during raising, and maximum velocity and uniform
acceleration and deceleration during lowering of the follower.
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Code No: R22032
6. Determine the minimum number of teeth and the arc of contact (in terms of module) to avoid
interference in the following cases i) Gear ratio unity ii) Gear ratio is 3 iii) pinion gears with a
rack. The addendum of the teeth is 0.88 module and the power component is 0.94 times the
normal thrust.
7. Determine the diameters of the cone pulley joined by a cross belt. The driven shaft is desired to
be run at speeds of 60, 90, and 120 rpm while the driving shaft rotates at 160 rpm. The center
distance between the axes of the two shafts is 2.5m. The smallest pulley diameter can be taken as
150mm.
8. A four speed sliding gear box of an automobile is to be designed to give approximate speed ratios
of 4, 2.4, 1.4 and 1 for the first, second, third and top gears respectively. The input and the output
shafts have the same alignment. Horizontal central distance between them and the lay shaft is 98
mm. the teeth have a module of 4 mm. No wheel has less than 16 teeth. Calculate suitable
number of teeth on each wheel and find the actual speed ratios attained.
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Code No: R22032
II B. Tech II Semester Supplementary Examinations May/June - 2015
KINEMATICS OF MACHINERY (Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
Provide Figures Wherever Necessary
~~~~~~~~~~~~~~~~~~~~~~~~~~~
1. a) How are the kinematic pairs classified? Explain with examples
b) A linkage has 14 links and the number of loops is 5. Calculate its i) degrees of freedom ii)
number of joints iii) maximum number of ternary that can be had. Assume that all the pairs
are turning pairs
2. What is a Scott-Russel mechanism? What is its limitations how it is modified
3. In a Slider –crank mechanism, the stroke of the slider is one-half the length of the connecting rod
Draw a diagram to give the velocity and acceleration of the slider at any instant assuming the
crankshaft to turn uniformly.
4. a) What is an automobile steering gear? Which steering gear is preferred and why?
b) In a Davis steering gear, the length of the car between axles is 2.4m, and steering pivots are
1.35m apart. Determine the inclination of the track arms to the longitudinal axis of the car
when the car moves in a straight path
5. A tangent cam with straight working faces tangential to a base circle of 120 mm diameter has a
roller follower of 48 mm diameter. The line of stroke of the follower passes through the axis of
the cam. The nose circle radius of the cam is 12mm and the angle between the tangential faces of
the cam is 900. If the speed of the cam is 180 rpm, determine the acceleration of the follower
when i) during the lift, the roller just leaves the straight flank ii) the roller is at the outer end of
its lift, i.e.at the top of the nose.
6. A two –start rotating at 800 rpm drives a 26 tooth worm gear. The worm has a pitch diameter of
54 mm and a pitch of 18 mm . If coefficient of friction is 0.06, find the i) helix angle of worm ii)
speed of gear iii) center distance iv) lead angle for maximum efficiency v) efficiency vi)
maximum efficiency
7. a) Derive the relation for ratio of belt tensions in a flat-belt drive.
b) Two parallel shafts, connected by a crossed belt, are provided with pulleys 480 mm and 640
mm in diameters. The distance between the centre lines of the shaft is 3 m. find by how much
the length of the belt should be changed if it is desired to alter the direction of rotation of the
driven shaft.
8. An epicyclic gear train consists of an arm and two gears A and B having 30 and 40 teeth
respectively. The arm rotates about the Centre of the gear A at a speed of 80 rpm counter
clockwise. Determine the speed of the gear b if i) the gear A is fixed and ii) the gear A revolves
at 240 rpm clockwise instead of being fixed.
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Code No: R22032
II B. Tech II Semester Supplementary Examinations May/June - 2015
KINEMATICS OF MACHINERY
(Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
Provide Figures Wherever Necessary
~~~~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Enumerate the inversions of a double slider crank chain. Give examples.
b) The distance between two parallel shafts is 18mmand they are connected by an Oldham’s
coupling. The driving shaft revolves at 160 rpm. What will be maximum speed of sliding of
the tongue of the intermediate piece along its grove?
2. With reference to a Paucullier mechanism, Show that it can be used to trace a straight line. Prove
mathematically?
3. In a four link mechanism, the dimensions of the links are as under: AB= 50 mm,, BC==66 mm,
CD= 56mm, and AD=100mm. At the instant ےDAB= 600,the link AB has an instantaneous
angular velocity of 10.5 rad/s and a retardation of 26 rad/s2 in the counter clockwise direction.
Velocity of the point E on the link BC when BE= 40mm, velocity of an offset point F on the link
BC if BF= 45mm, CF=30mm and BCF is read clockwise, velocity of an offset point G on the
link CD if CG= 24 mm, DG= 44mm and DCG is read clockwise. Draw a neat sketch. also find i)
the angular accelerations of the links BC and CD ii) the linear accelerations of the points E,
F and G
4. Derive an expression for the ratio of angular velocities of the shafts of a Hooke’s joint
5. What is a displacement diagram? why is necessary to draw it before drawing a cam profile
6. a) The number of teeth of a spur gear is 30 and it rotates at 200 rpm. What will be its circular
pitch and the pitch line velocity if it has a module of 2mm?
b) The following data relates to two meshing involute gears: Number of teeth on the gear
wheel=60, pressure angle=200, Gear ratio=1.5, Speed of the gear wheel= 100 rpm, module=
8mm. the addendum on each wheel is such that the path of approach and the path of recess on
each side are 40% of the maximum possible length each. Determine the addendum for the
pinion and the gear and the length of the arc of contact.
7. Two pulleys mounted on two parallel shafts that are 2m apart are connected by a crossed belt
drive. The diameters of the two pulleys are 500 mm and 240 mm. find the length of the belt and
the angle of contact between the belt and each pulley. Also, find the power transmitted if the
larger pulley rotates at 180 rpm and the maximum permissible tension in the belt is 900N. the
coefficient of friction between the belt and pulley is 0.28.
8. a) What is a sun and planet gear? Give the procedure to analyze such a gear train?
b) What is the difference between a simple gear train and compound gear train? Explain with
the help of sketches.
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Code No: R22036
II B. Tech II Semester Supplementary Examinations, May/June - 2015
MACHINE DRAWING (Com. to ME, AME)
Time: 3 hours Max. Marks: 75
Note: Part A: Answer any TWO of the following questions: PART-B is compulsory.
PART-A
1. Draw the front and top views of a square headed nut of size M24, when two faces of the nut
are equally seen in the front view.
2. Sketch the following:
i) Half section and offset section.
ii) Aligned and uni – directional system of dimensioning.
iii) Whit worth thread and Buttress thread.
3. Draw plan and sectional elevation of single riveted, double cover plate butt joint,
taking suitable dimensions. (12.5M×2=25M)
PART-B
4. Details of the vertical cross head are given below figure. Assemble the components in proper
sequence and draw a half sectional Front view, side view and Top view (50M)
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Code No: R22036
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SET - 1 R10
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Code No: R22036
II B. Tech II Semester Supplementary Examinations, May/June - 2015
MACHINE DRAWING (Com. to ME, AME)
Time: 3 hours Max. Marks: 75
Note: Part A: Answer any TWO of the following questions: PART-B is compulsory.
PART-A
1. Sketch any two views of a Cotter Joint with socket and spigot ends to connect two
rods of 20mm diameter each
2. Sketch :
i) Metric thread, nominal diameter 20mm and pitch 3mm.
ii) Double-start thread of square type, nominal diameter 40mm, and pitch 3mm
3. Show the conventional representation of the following materials
i) Wood ii) Lead iii) Straight Knurling
iv) Internal Screw Threads v) Bearing on shafts (12.5M×2=25M)
PART-B
4. Details of the feed check valve are given below figure. Assemble the components in proper
sequence and draw a half sectional Front view, side view and Top view (50M)
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SET - 2 R10
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Code No: R22036
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SET - 2 R10
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Code No: R22036
II B. Tech II Semester Supplementary Examinations, May/June - 2015
MACHINE DRAWING (Com. to ME, AME)
Time: 3 hours Max. Marks: 75
Note: Part A: Answer any TWO of the following questions: PART-B is compulsory.
PART-A
1. Draw two views of knuckle joint with properties to connect two shafts of 25 mm diameter.
2. Draw two views of a hexagonal headed bolt of M30 nominal size.
3. Draw sectional front view and top view of a double riveted zigzag lap joint to join two
plates ofthickness t=10mm (12.5M×2=25M)
PART-B
4. Details of the Screw jack are given below figure. Assemble the components in proper sequence
and draw a half sectional Front view, side view and Top view (50M)
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SET - 3 R10
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Code No: R22036
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SET - 3 R10
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Code No: R22036
II B. Tech II Semester Supplementary Examinations, May/June - 2015
MACHINE DRAWING (Com. to ME, AME)
Time: 3 hours Max. Marks: 75
Note: Part A: Answer any TWO of the following questions: PART-B is compulsory.
PART-A
1. Split muff coupling for 50mm diameter shaft. Draw sectional front view and top view
2. Answer the following
i) Knuckle Joint for 25 mm diameter Rods.
ii) any two types of feather keys
3. Draw half sectional view from the front, with left half in section and view from above
of a bushed bearing, suitable for supporting a shaft of diameter 25 mm (12.5M×2=25M)
PART-A
4. Details of the petrol engine connecting rod are given below figure. Assemble the components in
proper sequence and draw a half sectional Front view and Top view (50M)
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SET - 4 R10
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Code No: R22036
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Code No: R22031
II B. Tech II Semester Supplementary Examinations May/June - 2015
MECHANICS OF SOLIDS
(Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~
1. a) Derive the relation between Young’s modulus, shear modulus and bulk modulus.
b) Define the following
i) Factor of safety ii) Poisson’s ratio iii) Hooks law (8M+7M)
2. a) Define point of contra flexure.
b) Draw the Shear force and bending moment diagram for the loaded beam as shown in
Figure 1. (2M+13M)
3. a) Derive flexure equation.
b) A rectangular beam 200mm deep and 300mm wide is simply supported over a span of 8m.
What uniformly distributed load per meter the beam may carry, if the bending stress is not
to exceed 120 N/mm2. (8M+7M)
4. The shear force acting on a section of a beam is 100kN. The section of the beam is T shaped
of dimensions 100x100x20mm. The moment of inertia about the horizontal neutral axis is
314.221×104 mm
4. Calculate the shear stress at the neutral axis and at the junction of the web
and flange. Draw the distribution of shear stress across the depth of the section. (15M)
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Code No: R22031
5. Find the forces in all the members of the truss shown in Fig
6. a) Calculate slope and deflection at
uniformly distributed load over entire span.
b) A beam 3m long, simply supported at its ends, is carrying a
entire span. If the slope at
the center of the beam.
7. a) Differentiate between thin and thick cylindrical shells
b) A spherical shell of 2m diameter is subjected to an internal pressure
thickness required for the shell, if the allowable stress is 100
in volume. Take E = 2×10
8. A compound cylinder is made by shrinking a cylinder of external diamete
cylinder of external diameter 25cm and internal diameter15cm.
compression at the common
junction if E=2×105 N/mm
2
the members of the truss shown in Figure 2.
) Calculate slope and deflection at the free end of a cantilever when it is subjected to
uniformly distributed load over entire span.
, simply supported at its ends, is carrying a uniformly distributed load over
slope at the ends of the beam should not exceed 10, find the deflection at
a) Differentiate between thin and thick cylindrical shells
A spherical shell of 2m diameter is subjected to an internal pressure of 2
thickness required for the shell, if the allowable stress is 100 N/mm2. Also calculate change
×105N/mm
2, and Poisson’s ratio=0.3
A compound cylinder is made by shrinking a cylinder of external diamete
diameter 25cm and internal diameter15cm. After shrinking
the common junction was 28 N/mm2. Find the original difference in radii at the
2.
2 of 2
R10
(15M)
when it is subjected to
uniformly distributed load over
, find the deflection at
(7M+8M)
of 2 N/mm2. Find the
Also calculate change
(4M+11M)
A compound cylinder is made by shrinking a cylinder of external diameter 30cm over another
fter shrinking the radial
Find the original difference in radii at the
(15M)
SET - 1
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Code No: R22031
II B. Tech II Semester Supplementary Examinations May/June - 2015
MECHANICS OF SOLIDS
(Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~
1. a) Draw stress strain diagram for structural steel and locate various important salient points
on that.
b) Derive an expression for strain energy when the member is subjected to gradually applied
load.
2. Draw the Shear force and bending moment diagram for the loaded beam as shown in Fig 1.
(15M)
3. a) Derive the flexure formula
b) An I section beam has 200mm wide flanges and an overall depth 500mm. Each flange is
25mm thick and the web is 20mm thick. At a certain section bending moment is M. Find
what percentage of M is resisted by flanges and web. (7M+8M)
4. The shear force acting on a section of a beam is 50kN. The section of the beam is T shaped of
dimensions 100x100x20mm. The moment of inertia about the horizontal neutral axis is
314.221×104mm
4. Calculate the shear stress at the neutral axis and at the junction of the web
and flange. Also draw shear stress distribution across the depth of the section. (15M)
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Code No: R22031
5. Find the forces in all the members of the truss shown in Figure 2 (15M)
6. a) State Mohr’s theorems
b) Using Macaulay’s method calculate slopes and deflections under the loads and also
maximum deflection as the beam loaded as shown in Figure 3. (4M+11M)
7. a) What is the difference between thin walled cylinder and thin walled pressure vessel
b) Calculate the increase of volume per unit volume of a thin walled steel circular cylinder
closed at both ends and subjected to a uniform internal pressure of 0.5MPa. The wall thickness
is 1.5mm, the radius is 350mm, Take E=2×105N/mm
2and Poisson’s ratio = 0.3 (4M+11M)
8. Determine the maximum and minimum hoop stress across the section of a pipe of 400mm
internal diameter and 100mm thick, when the pipe contains a fluid at a pressure of Also sketch
the variation of hoop and radial stress distribution across the thickness. (15M)
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Code No: R22031
II B. Tech II Semester Supplementary Examinations May/June - 2015
MECHANICS OF SOLIDS
(Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~
(7M+8M)
1 a) Define the following
i) Poisson’s ratio ii) shear modulus iii) Volumetric strain
b) A steel rod is 2.2 m long and must not stretch more than 1.2 mm when a 8.5kN load is
applied to it. Knowing that E = 200GPa, determine (i) the smallest diameter rod that should
be used, (ii) the corresponding normal stress caused by the load. (6M+9M)
2 . Draw the Shear force and bending moment diagram for the loaded beam as shown in Figure 1.
(15M)
3. Derive bending stresses for i) Solid rectangular cross section and ii) Hollow circular cross
section (15M)
4. An I section beam 350mmx150mm has a web thickness of 10mm and a flange thickness of
20mm. If the shear force acting on the section is 40kN, find the maximum shear stress
developed in the section and also sketch the variation of shear stress across the depth of the
section. (15M)
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Code No: R22031
5. Find the forces in all the members of the truss shown in Figure 2. (15M)
6. a) Define Mohr’s theorems.
b) A beam of length 6m is simply supported at its ends and carries a point load of 40KN at a
distance of 4m from the left support. Find the deflection under the load and maximum
deflection. Also calculate the point at which maximum deflection takes place, given moment
of inertia of the beam is I = 7.33×107mm
4 and E = 2×10
5 N/mm
2 (4M+11M)
7. A thin cylindrical shell of 120cm diameter, 1.5cm thick and 6m long is subjected to internal
fluid pressure of 2.5 N/mm2. If the value of E = 2 × 10
5 N/mm
2 and Poisson’s ratio = 0.3,
calculate change in diameter, length and volume. (15M)
8. A compound cylinder is made by shrinking a cylinder of external diameter 200 mm and
internal diameter 160 mm over another cylinder of external diameter 160 mm and internal
diameter 120 mm. The radial pressure at the junction after shrinking is 8 N/mm2. Find the
final stresses set up across the section, when the compound cylinder is subjected to an
internal fluid pressure of 60 N/mm2. (15M)
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Code No: R22031
II B. Tech II Semester Supplementary Examinations May/June - 2015
MECHANICS OF SOLIDS
(Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~
1. A specimen of steel 25mm diameter with a gauge length of 200mm is tested to destruction. It
has an extension of 0.16mm under a load of 80KN and load at the elastic limit is 160KN. The
maximum load is 180KN. The total extension at fracture is 56mm and diameter at neck is
18mm. Find a) stress at elastic limit b)Young’s modulus c) percentage elongation d) percentage
reduction area e) ultimate tensile stress (15M)
2. Draw the Shear force and bending moment diagram for the loaded beam as shown in Figure 1.
(15M)
3. A cast iron beam has an I section with top flange 100mm×40mm, web 140mm×20mm and
bottom flange 180mm×40mm. If tensile and compressive stresses are not to exceed 35MPa
and 95MPa respectively, what is the maximum uniformly distributed load the beam can carry
over a simply supported span of 6m if the larger flange is in tension. (15M)
4. A simply supported beam of rectangular cross section and length L carries a load W at distance
L/5 from the left support. The ratio of maximum allowable stress in bending and shear is 6:1.
Find the ratio of length and depth of the beam such that both bending and shear stresses reach
the maximum allowable limits simultaneously. (15M)
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Code No: R22031
5. Find the forces in all the members of the truss shown in Figure 2. (15M)
6. Determine deflection and slope at C for the beam loaded as shown in Figure 3. The beam has a
cross section 40 mm wide and 100 mm deep. E= 200 GPa. (15M)
7. A cylindrical shell 3 meters long which is closed at the ends has an internal diameter of 1m and
wall thickness of 15 mm. Calculate the circumferential and longitudinal stresses induced and
also changes in dimensions of the shell, if it is subjected to an internal pressure of 1.5 N/mm2.
Take E = 2 X 105
N/mm2 and also and µ = 0.3
(15M)
8. A compound cylinder is made by shrinking a cylinder of external diameter 300mm and internal
diameter of 250mm over another cylinder of external diameter 250mm and internal diameter
200mm. The radial pressure at the junction after shrinking is 8 N/mm2. Find the final stresses
set up across the section, when the compound cylinder is subjected to an internal fluid pressure
of 84.5 N/mm2
(15M)
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Code No: R22035
II B. Tech II Semester Supplementary Examinations, May/June - 2015
METALLURGY AND MATERIAL SCIENCE (Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Differentiate between ionic and covalent bonds.
b) Describe the properties of metallic bond.
2. a) Differentiate between primary and secondary solid solutions.
b) What are Hume-Rothery rules? Explain.
3. a) Describe the methods of plotting an equilibrium diagrams. What are its applications?
b) Draw Fe-Fe3C phase diagram and label the phase fields. Describe the different reactions that
take place in this system.
4. a) Describe the following cast irons:
i) Malleable cast iron ii) Grey cast iron iii) White cast iron
b) List out the composition properties and applications of Hadfield Manganese steels.
5. Explain the construction of TTT diagram according to the first principle. Why it is called
S curve?
6. a) What are the particular characteristics of alloys of Cu-Zn system, which contain only
α solid-solution. Explain them.
b) Explain why alpha brasses are cold worked and (α +β) brasses are hot worked brasses.
c) As the solute content (zinc) increases in copper, strength as well ductility increases.
Why? Explain.
7. a) What are ceramics? Classify ceramics in detail.
b) Differentiate between traditional ceramics and advanced ceramics.
8. a) What are the various techniques adopted to make components made of polymer
matrix composites?
b) Explain any two methods of making polymermatrix composites.
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Code No: R22035
II B. Tech II Semester Supplementary Examinations, May/June - 2015
METALLURGY AND MATERIAL SCIENCE (Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Differentiate between primary and secondary bonds.
b) Describe the effect of grain boundaries on the properties of metal.
2. a) What are the different types of solid solutions? Explain substitutional solid solution with
suitable examples.
b) How does an interstitial solid solution differ from interstitial compound?
3. a) Draw a typical Equilibrium diagram for two metals completely soluble bothin liquid
and solid states. Label the important points, lines and areas in it.
b) With neat sketchesdescribe in detail order-disorder transformations.
4. a) Discuss the microstructure, properties and applications of grey cast iron and spheriodal
graphitecast iron.
b) Describe how does the ductility vary with the shape of the graphite in cast iron.
5. a) Differentiate between hardness and hardenability.
b) What are the various methods of determining hardenability?
c) Describe the Jominy end quench method of determining hardenability.
6. a) What are the characteristics of titanium that makes it attractive for certain engineering
applications?
b) Which elements are used to alloy with titanium?
c) Why are some of the titanium alloys are heat treatable?
7. a) Explain y the ceramic materials in detail
b) Discuss structure, properties and applications of advance ceramics.
8. a) What is meant by polymerization? Compare and contrast between addition
polymerization and condensation polymerization.
b) Why fiber reinforcement is so important? Describe any one fabrication method of fibers.
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R10 SET - 2
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Code No: R22035
II B. Tech II Semester Supplementary Examinations, May/June - 2015
METALLURGY AND MATERIAL SCIENCE (Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Describe dependence of mechanical properties of steels on grain size.
b) Describe any two methods of determination of grain size.
2. a)What are the different types of solid solutions?Explain interstitial solid solution with
suitable examples.
b) What is chemical affinity factor? Should this be high, or low for the formation of
substitutional solid solutions? Why? Explain.
3. a) Explain the lever rule as applied to equilibrium diagrams.
b) ‘Eutectic composition’ usually does not show coring whereas a solid solutionmay show
“coring”. Explain why.
4. a) Describe the microstructure, properties and applications of grey cast iron and malleab
cast iron.
b) Differentiate between plain carbon and alloy steels. What are the limitations of plain
carbon steels? What is the role of alloying elements?
5. a) Differentiate between annealing and normalizing.
b) Why it is necessary to toughen the core before hardening the case?
c) What is case carburizing treatment? What is the surface hardness obtained and
approximate carbon content of the carburized case?
6. a) Describe the effect of increasing zinc on the properties of copper.
b) What is season cracking of brasses? How it can be avoided?
7. a) What are ceramics? List out the ceramics that are used for coatings for use at high
temperature.
b) Give the examples of ceramics for exhibiting optical and electrical properties. What are
their applications?
8. What are the metal matrix composites? Classify the metal matrix compositesfabrication
methods. Explain any two methods of making these composites.
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R10 SET - 3
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Code No: R22035
II B. Tech II Semester Supplementary Examinations, May/June - 2015
METALLURGY AND MATERIAL SCIENCE (Com. to ME, AME, MM)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Describe Fermi cloud with regard to metallic bond.
b) How does grain size influence the mechanical properties of materials. Describe any two
methods of determination of grain size.
2. a) What is a solid solution? Give the classification and explain the rules for the formation of
solidsolutions.
b) Explain why atomic size difference is only 4.2% still Zn can dissolve up to 38.4% in Cu?
3. a) Explain the phase changes that take place when an eutectoid steel is cooled from
austenitic temperature to room temperature.
b) What is allotropy? Explain the allotropic transformation of Iron.
4. a) What is the effect of section thickness upon the structure and properties of grey cast iron?
b) What is the effect of nickel upon section sensitivity of grey cast iron?
c) Why Hadfield steel is used for making rail crossings and jaw plates?
5. a) With the help of a suitable diagram, show normalizing and hardening temperature ranges
for plain hypereutectoid steels.
b) Compare the processes of flame hardening with induction hardening.
6. a) In what ways the mechanical properties of Aluminum and its alloys can be increased?
b) What is the main effect of adding the following elements to Aluminum?
(i) Copper (ii) Silicon (iii) Magnesium (iv) Zinc
7. a) What are the important characteristics of ceramics?
b) Describe the composition, properties and uses of different type of glasses.
8. What are the various techniques adopted to make components made of ceramic matrix
composites? Explain any two methods of making these composites.
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R10 SET - 4
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Code No: R22034
II B. Tech II Semester Supplementary Examinations, May/June - 2015
PRODUCTION TECHNOLOGY (Mechanical Engineering)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) What are the factors to be considered before selecting the material for a pattern?
b) When do you use a i) Solid Pattern, ii) Split pattern and iii) Match Pattern? Give reasons and
an example in each case.
2. a) With the help of diagrams explain the investment casting process.
b) Discuss the various factors to be considered for die casting design.
3. a) Explain the process of thermit welding and discuss its advantages?
b) How do you classify the welding processes? Explain briefly.
4. a) Describe with neat sketch the CO2 – MIG welding process and give its specific applications.
b) What is weldability? What factors influence it?
5. a) Explain the possible defects in rolling and suggest suitable remedies.
b) On a certain mill the rolling load for 25% reduction is 7KN/mm of width. What is the
rolling load when front and back tensions of 120 and 150MPU are applied? σ0 = 13KN/mm2
and α = 2β.
6. a) A cup of 50mm diameter and 20mm height is to be produced by drawing from a 1.5mm
thick sheet metal. Find the blank diameter and the maximum drawing force. Assume
ultimate strength of sheet metal to be 650MN.
b) What is the difference between drawing and extrusion? How does deep drawing differ from
bar drawing?
7. a) Distinguish between forward extrusion and backward extrusion.
b) What are the various forging hammers? Discuss their advantages and limitations.
8. a) What are the forms of raw materials for processing plastics in to products?
b) Why is injection molding capable of producing parts with complex shapes and fine detail?
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R10 SET - 1
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Code No: R22034
II B. Tech II Semester Supplementary Examinations, May/June - 2015
PRODUCTION TECHNOLOGY (Mechanical Engineering)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) What do you mean by an allowance? List out different allowances.
b) What points are to be considered before the selection of “casting process” for
manufacturing a component? Explain.
2. a) Differentiate between directional and unidirectional solidification.
b) Compare cold chamber and hot chamber method of die casting.
3. a) Explain how Oxy-acetylene torch can be used for both welding and cutting?
b) What does a thermit mixture consists of and what reactions take place in thermit welding?
4. a) What are the characteristics of heat affected zone in welding?
b) Describe the difference between brazing and soldering?
5. a) Describe roll pressure distribution along arc of contact and derive equation for maximum
draft to be taken in rolling.
b) Describe rolling mills and rolling of bars and shapes.
6. a) What are the similarities and differences between piercing and blanking?
b) Why are multiple passes usually required in wiredrawing operations? Explain.
7. a) Describe the rotary forging process with a sketch. What are its typical applications?
b) A connecting rod is to be forged. Describe in detail the operations required.
8. a) What are the benefits of using a hot runner distribution system when injection moulding a
thermoplastic?
b) What is the difference between open cell and closed fell foamed plastics?
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R10 SET - 2
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Code No: R22034
II B. Tech II Semester Supplementary Examinations, May/June - 2015
PRODUCTION TECHNOLOGY (Mechanical Engineering)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Describe with the help of a neat sketch, the working of a sweep pattern stating its
advantages?
b) What is the significance of shrinkage in the production of castings?
2. What is meant by directional solidification? Explain why directional solidification is preferred
in foundries.
3. a) What are the parameters that decide drag in oxy-fuel gas cutting? Explain how a good cut is
achieved?
b) Differentiate between solid phase welding and liquid phase welding?
4. a) Why do most welding failures occur in HAZ? Explain.
b) Compare TIG and MIG welding equipments. State the method of selection among the two.
5. a) Explain the changes in structure and properties during cold working, recovery and
recrystallization.
b) Derive an expression for work of plastic deformation.
6. a) Explain the different stages involved in the blanking operation?
b) What factors influence the clearance between punch and die?
c) How does the wire drawing process is different from tube drawing process?
7. a) Explain the features of a typical forging die?
b) Describe impact extrusion with a neat sketch. Write the application.
8. a) Distinguish between thermosetting plastics and thermoplastics.
b) List few components manufactured by the injection moulding and justify why they are
manufactured in that way?
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R10 SET - 3
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Code No: R22034
II B. Tech II Semester Supplementary Examinations, May/June - 2015
PRODUCTION TECHNOLOGY (Mechanical Engineering)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Describe the capabilities of the casting process in terms of size and shape of the product?
b) Why is it important to provide a means of venting gases from the mold cavity?
2. a) Describe the solidification of a pure metal with a neat sketch.
b) Large castings are not made by investment casting. Comment.
3. a) What functions are served by the outer zone of the welding flame?
b) Describe the metallurgical effects of resistance welding cycle.
4. a) Why do properties vary widely in most welding heat affected zones?
b) With the help of a neat sketch explain the inert gas welding process.
5. a) Describe the importance of controlling rolling speeds, roll gaps, temperature and other
process variables in a tandem rolling operation.
b) What is the approximate relationship between melting point and recrystallization
temperature of a metal?
6. a) Describe the operation of hot spinning with a sketch.
b) Sketch blanking operation naming the important elements and their role in the process.
7. a) What principles are normally considered good practice in the design of drop forgings?
b) How are tubes extruded? Explain with a sketch.
8. With the help of suitable figures explain the injection moulding process of plastics? What are
the advantages and applications?
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R10 SET - 4
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Code No: R22033
II B. Tech II Semester Supplementary Examinations May/June - 2015
THERMAL ENGINEERING - I (Com. to ME, AME)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Define volumetric efficiency and discuss the effect of various factors affecting the
volumetric efficiency.
b) Discuss the effect of variable specific heat and dissociation of gases on Otto cycle.
2. a) Describe with a neat sketch the working principle of a crankcase scavenged two stroke
engine.
b) Draw the ideal and actual indicator diagrams of a two stroke SI Engine. How are they
different from that of a four stroke cycle engine?
3. a) Discuss the effect of engine variables on ignition in the case of SI Engines.
b) What are the requirements of good combustion chambers of SI Engines?
4. a) What do you mean by delay period in CI Engines? Discuss the parameters that affect
the delay period.
b) Discuss the various types of combustion chambers used in CI Engines.
5. a) List out various methods of finding friction power and discuss them in brief
b) During the testing of a single cylinder,four stroke oil engine the following observations
were taken: Brake wheel diameter = 65 cm, rope diameter = 3 cm, speed = 450 rpm, load on
band = 270 N, spring balance reading = 40 N, area of indicator diagram = 4.2 cm2, length
of indicator diagram = 6.5 cm, spring stiffness = 12 bar/cm, bore 11 cm, stroke =16 cm,
specific fuel consumption = 0.3129 kg/kW-hr, C.V. of fuel = 41868 kJ/kg. Estimate the
B.P., I.P., Indicated thermal efficiency and Brake thermal efficiency.
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R10 SET - 1
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Code No: R22033
6. a) Deduce an expression for the optimum value of inter cooling pressure in a two stage
compressor and show how this expression may be extended to meet the case when
there are N stages.
b) A single acting two stage reciprocating air compressor installed at an altitude of 1500 m has
to deal with 5.6 m3/min of air under free air condition of 1 bar and 15
oC. The suction
temperature is - 2 oC and the delivery pressure is 9 bar. Assuming complete intercooling
between the stages, find the cylinder diameters and the common stroke and the revolutions
being run per minute. Assume a piston speed of 125 m/min, clearance 5% of swept volume
for both cylinders and stroke equal to the diameter of L.P. cylinder. Equation of expansion
and compression is PV1.3
= constant. Take sea level conditions as 1 bar and a fall of 0.1 bar
per 1000 m of altitude.
7. a) Define slip factor and power input factor. Also obtain an expression for total pressure ratio
in terms of slip factor, power input factor, total head isentropic efficiency, blade velocity at
outlet, temperature and specific heat at inlet and ratio of specific heats.
b) With the help of head - capacity graph discuss the merits and demerits of radial, backward
and forward curved vanes in centrifugal compressors.
8. a) What are the factors which limit pressure rise in a single stage axial flow compressor
b) Show that the degree of reaction of a stage of an axial flow compressor is
1 – [ (Cw1 - Cw2) / 2 U ] Where Cw1 and Cw2 are velocity of whirl at inlet and outlet
respectively and U is the mean blade velocity.
2 of 2
R10 SET - 1
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Code No: R22033
II B. Tech II Semester Supplementary Examinations May/June - 2015
THERMAL ENGINEERING - I (Com. to ME, AME)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Discuss the differences between air standard and actual diesel cycle
b) Discuss the effect of spark advance on the performance of an Otto cycle engine.
2. a) Briefly explain the classification of I.C. Engines.
b) Draw and discuss the port timing diagram of a two stroke engine.
3. a) Discuss detonation or knock theory of SI Engines.
b) Describe the various types of combustion chambers in SI Engines.
4. a) “Factors tending to increase knock in SI Engines tend to reduce knock in CI Engines”.
Discuss.
b) Describe three methods of producing general swirl in CI Engines.
5. a) What are the various engine efficiencies? Explain each of them
b) Air consumption for a four stroke petrol engine is measured by means of sharp edge circular
orifice of diameter 3.8 cm having 0.6 as the coefficient of discharge. The drop in pressure
through the orifice is equivalent to 145 mm of water. The barometer reads 75.5 cm of Hg.
The temperature of air may be taken as 26 oC. The compression ratio of the engine is 6. The
piston displacement volume is 2000 cm3. The engine develops a brake power of 29.5 kW
when running at 2600 rpm. The fuel consumption of the engine is 0.14 kg/min and the C.V.
of fuel is 43960 kJ/kg. Calculate air-fuel ratio, volumetric efficiency, brake mean effective
pressure and relative efficiency.
6. a) Explain the terms brake power, indicated power and mechanical efficiency as applied to
reciprocating compressor.
b) The following data were obtained from the performance test of a 14 cm × 10 cm single stage
reciprocating air compressor having 3 percent clearance: Barometer pressure = 77 mm Hg,
suction pressure = 0 bar gauge, suction temperature = 22 oC, discharge pressure = 4.05 bar
gauge, discharge temperature = 174 oC, shaft rpm = 1160, shaft power = 5 kW, mass of air
delivered per minute = 1.75 kg. Determine the actual volumetric efficiency, indicated
power, isothermal compressor efficiency, mechanical efficiency and the overall efficiency
of the unit.
7. a) Define prewhirl. Why does the prewhirl provided and why and how it is varied from root to
tip at inlet?
b) Sketch the ideal velocity diagrams for a radial blade of a centrifugal compressor having axial
velocity at inlet. Obtain an expression for outlet velocity, work done and pressure rise.
8. a) Define degree of reaction. Differentiate between the blading of a reaction turbine and
that of an axial flow compressor.
b) Draw velocity diagram at the entry and exit for the axial compressor stage.
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R10 SET - 2
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Code No: R22033
II B. Tech II Semester Supplementary Examinations May/June - 2015
THERMAL ENGINEERING - I (Com. to ME, AME)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Discuss briefly the loss due to gas exchange process.
b) Compare the actual and fuel-air cycles of a gasoline engine.
2. a) Discuss the phases of spray formation in fuel injection.
b) Explain the working principle of pintle and pintaux nozzle.
3. a) Discuss the effect of engine variables on flame speed in the case of SI Engines.
b) Discuss the variables affecting knock in SI Engines.
4. a) Explain the phenomena of diesel knock and discuss the factors affecting diesel knock.
b) What are the factors to be considered for the design of combustion chambers of the CI
Engines.
5. a) What do you mean by heat balance of an IC Engine? Discuss the heat balance diagram of an
IC Engine at constant speed.
b) During the testing of four stroke cycle, 8 cylinder, petrol engine following data were
obtained. Load on the hydraulic dynamometer = 950 N, speed = 1250 rpm, bore = 70 mm,
stroke = 89 mm, fuel consumption = 19.5 kg/hr, C.V. = 43542 kJ/kg, jacket water
flow = 1400 kg/hr, temperature rise in jacket water = 30 oC, air-fuel ratio = 32, room
temperature = 30 oC, exhaust gas temperature = 400
oC, fuel analysis = 15% H2 and 85% C,
partial pressure of water vapour in the exhaust gas = 0.02 bar, cp of vapour = 2.09 kJ/kg K,
cp of dry exhaust gases = 1.005 kJ/kg K, the constant of hydraulic dynamometer = 17280.
Draw the heat balance sheet.
6. a) Discuss concisely the reason for the use of multistage reciprocating compressors. Explain
the underlying principle by means of P-V and T-S diagrams.
b) Calculate the size of the cylinder for double acting reciprocating air compressor of 40
kW. indicated power which compresses air from pressure of 1 bar and temperature 15oC to a
pressure of 6 bar according to the law PV1.2
= Constant. The compressor runs at 100
rev/min, with an average piston speed of 150 m/min. Neglect clearance.
7. a) Compare the relative merits and demerits of reciprocating and rotary compressors.
b) Describe the working of a roots blower with help of a neat sketch and p-v diagram.
8. a) Explain the phenomena of surging and choking in rotary compressors.
b) What is a forced vortex blade? Draw the velocity triangles at the root and tip of a forced
vortex blade.
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R10 SET - 3
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Code No: R22033
II B. Tech II Semester Supplementary Examinations May/June - 2015
THERMAL ENGINEERING - I (Com. to ME, AME)
Time: 3 hours Max. Marks: 75
Answer any FIVE Questions
All Questions carry Equal Marks
~~~~~~~~~~~~~~~~~~~~~~~~
1. a) Briefly explain time loss factor, heat loss factor and exhaust blow down.
b) How does the composition of exhaust gases vary for various fuel-air ratios in a
gasoline engine?
2. a) List out the advantages and disadvantages of liquid and air cooling systems.
b) Discuss the properties of a good lubricant.
3. a) Describe the method of rating the SI engine fuels.
b) What do you mean by dopes and inhibitors? Name various antiknock additives that are
being used in SI Engines.
4. a) Discuss in detail the various stages of combustion in CI Engines.
b) Describe the knock rating CI of engine fuels.
5. a) What is the function of dynamometer? Classify the dynamometers.
b) A four cylinder four stroke gasoline engine working at 3000 rpm develops a brake
power of 21 kW. A Morse test was conducted on this engine and the brake power obtained
when each cylinder was made inoperative by short circuiting the spark plug are 15, 14.2,
14.7 and 14.4 kW respectively. The Morse test was conducted at constant speed. Find the
indicated power, mechanical efficiency and brake mean effective pressure,when all the
cylinders are firing. The bore and stroke of the engine are 8 cm and 9 cm respectively.
6. a) Derive an expression for the work done in a single stage reciprocating compressor neglecting
the effect of clearance when the compression follows the law PVn = constant.
b) A single stage air compressor is required to deal with 30 m3/hr of free air at 1 bar. The
delivery pressure at 450 rpm is 6.5 bar. Calculate clearance ratio, the I.M.E.P. and B.P. if
mechanical efficiency is 0.8, isothermal efficiency is 0.76 and volumetric efficiency is 0.75.
7. a) Distinguish between positive and non positive displacement type of compressors. Give
applications of each.
b) Describe the working of a vane type compressor with a neat sketch and draw its p-v diagram.
8. a) What is free vortex blade? Derive the work done and reaction ratio for a free vortex blade.
b) Define flow coefficient, stage loading and pressure coefficient for an axial compressor stage.
1 of 1
R10 SET - 4
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