EI-Mechanical (Full)

8/7/2019 EI-Mechanical (Full)

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2002 Mechanical - Part 2

I. Choose the correct answer and indicate by Tick mark (4 ) in the bracketprovided for any twenty of the following. Each question carries ONE mark.

Half mark will be deducted for wrong answer.

MARKS : 20

1. In the welding process, filler metal is used ina. Electric spot welding b. Seam weldingc. Projection welding d. Arc welding

2. The following gas is used in TIG welding processa. Acetylene b. Oxygen c. Hydrogen d. Argon

3. PERT is a technique used fora. Operations analysis b. Prodn. Engg. Review Technique

c. Programme implementation d. Inventory analysis

4. An external micrometer is having an error of minus 30 microns and is used formeasuring a plate of 13.3 mm thickness. The observed reading is

a. 13.6mm b. 13.33mm c. 13.27mm d. 1.30mm

5. The main purpose of flywheel in a power press is to

a. Increase the force b. Store & release energy as required

c. Avoid machine vibration d. Regulate the motor speed

6. Powder metallurgy is most suited for making

a. Large machine parts b. Transistorsc. Cutting tools d. Loudspeaker cones

7. Galvanizing process is

a. Zinc spraying b. Zinc platingc. Immersing in the molten zinc d. Cadmium plating

8. The usual thread used in a screw jack isa. Knuckle thread b. Square thread c. Acme thread d. V thread

9. Ultrasonic machining is used for machininga. Stainless steel b. Glass c. Plastics d. Rubber

10. Slip gauges are used for measuring accuracy better thana. 0.10 mm b. 0.05 mm d. 1 mm d. 0.001 mm

11. One meter equal to

a. 103 microns b. 104 microns c. 105 microns d. 106 microns

12. Tempering of steel is done at

a. 700o C to 750o C b. 1500o C to 1600o Cc. 300o C to 400o C d. 900o C to 1000o C

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13. Value engineering is the study ofa. Cost of the equipment b. Function related to cost

c. Material cost d. Production cost

14. In the drawings, surface roughness is represented by

a. Concentric circles b. Parallel linesc. Parallelogram d. Inverted triangles

15. Which one of the following is not used as a cutting tool materiala. HSS b. Platinum c. Tungsten-Carbide d. Diamond

16. Aluminium profiles are made from Aluminium ingot bya. Rolling b. Extrusion c. Forging d. Casting

17. The temperature range for soldering process isa. 40o C to 100o C b. 180o C to 300o C

c. 400o C to 500o C d. 600o C to 900o C

18. Spinning operation is carried out ona. Hydraulic press b. Mechanical press

c. Lathe machine d. Milling machine

19. The purpose of jigs and fixtures is to

a. Increase production rate b. Increase machining accuracy

c. Facilitate interchangeable manufacture d. All of the above

20. Gears are best mass produced by

a. Milling b. Hobbing c. Shaping d. Forming

21. Blanking and piercing operation can be performed simultaneously ina. Simple die b. Progressive die c. Compound die d. combination die

22. In press operation, the size of the blanked part is dependent on

a. Punch size b. Die size c. Average of Punch & die size d.

23. 75o Celsius when converted to Fahrenheit is equal to

a. 157o F b. 164o F c. 167o F d. 170o F

24. Which of the following is the most Ductile material

a. Mild steel b. Copper c. Zinc d. Aluminium

25. A pulley having a 0.09 mts. Diameter is belted to a pulley of 60 mm diameter. Ifthe large pulley rotates at 120 RPM the speed of the small pulley is

a. 80 RPM b. 100 RPM c. 180 RPM d. 160 RPM

26. A rod with external threads on both ends is termed as

a. Nut b. Bolt c. Stud d. Tapped bolt

27. Work study is concerned with

a. Improving present method and finding standard time

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b. Motivation of workers

c. Improving production capabilityd. Improving production planning and control

28. The hardest known material is

a. Granite b. Ceramic c. Diamond d. Cemented Carbide

29. Araldite isa. Epoxy resin adhesive b. Thermosetting plasticc. Vegetable resin adhesive d. None of the above

30. ABC analysis deals witha. Analysis of process chart b. Flow of material

c. Ordering & schedule of parts d. Controlling inventory cost

II. Tick (4 ) TRUE or FALSE for any 20 of the following. Each question carriesONE mark. HALF mark will be deducted for wrong answer. In case any

candidate answers more than 20 questions, only the first 20 questions answeredwill be considered.

MARKS : 20

1. Welding is the process of joining dissimilar metals TRUE/FALSE

2. Feeler gauge is used to measure the thickness of material TRUE/FALSE

3. Cost iron contains about 2% carbon TRUE/FALSE

4. Helicoils are used in tapped holes of hard materials TRUE/FALSE

5. SST essentially is chromium alloy material TRUE/FALSE

6. Acme thread facilitates engaging split nut with screw rod in a

lathe machine TRUE/FALSE

7. Lowering on a metal part is done by milling operation TRUE/FALSE

8. One of the drive systems used to transform circular motion

into rectilinear motion is rack and pinion TRUE/FALSE

9. Dip brazing is used for brazing copper and copper alloys TRUE/FALSE

10. Side and Face milling cutter has cutting teeth on the end and side

faces of cutter TRUE/FALSE

11. Reaming is done to achieve size accuracy of hole TRUE/FALSE

12. Honing is process mostly used for getting better finish in

round holes TRUE/FALSE

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13. Pickling process is the removal of surface oxides and scales

from metals TRUE/FALSE

14. Snap gauge is used to check internal diameters TRUE/FALSE

15. Quick return motion mechanism is used in shopping machine TRUE/FALSE

16. Chemical blackening finish is widely used on copper andcopper alloys TRUE/FALSE

17. Volume of a sphere is given by the formula TRUE/FALSE

18. Brass is an alloy of zinc and tin. TRUE/FALSE

19. Pantograph mechanism is used in engraving machines TRUE/FALSE

20. Neoprene is a name for natural rubber TRUE/FALSE

21. The whit worth thread has an angle of 60 TRUE/FALSE

22. Machined Aluminium parts can be silver-plated TRUE/FALSE

23. JIT system leads to increased inventory TRUE/FALSE

24. In EDM machining, graphic can be used as an electrode TRUE/FALSE

25. For project implementation either CPM or PERT charts can be used TRUE/FALSE

26. In salt spray testing, sodium cyanide solution is used TRUE/FALSE

27. Productivity is different from efficiency TRUE/FALSE

28. Anodised surface is electrically conductive TRUE/FALSE

29. ISO 9000 stands for a set of Indian standards dealingwith quality system TRUE/FALSE

30. Worm and worm wheel is used where high reduction ratio is required TRUE/FALSE

III. FILL IN THE BLANKS WITH CORRECT ANSWERS FOR ANY TWENTYOF THE FOLLOWING.

MARKS 20

1. ______BRINNEL_HARDNESS_ROCKWELL__________ Test method iscommonly used for checking hardness of steel

2. HSS contains 4% _____________, 1% ____________ and 18% _____________

3. The taper used in a taper shank drill bit is ________________ standard taper

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4. In a double start thread screw, the pitch is ___________ times the lead

5. __FEELER________ gauges are used for checking clearance between mating

surfaces

6. ___MAGNETIC__________ chuck is used for holding thin work piece of mild steel

7. _______PUNCHING______ is a method of removing material by pushing or pulling

ofcutting tool

8. In machining CAM refers to _____COMPUTER AIDEDMANUFACTIRING_______________________________

9. CBN coated tools the letters CBN refer to __________________________

10. Instrument used for measuring RPM of a rotating shaft is

__SPEEDOMETER____________

11. If the side of a solid cube is 20 mm the total surface

______400____________

12. Volume of a cylinder of dia. D and height H is given by the formula _____________

13. Principle of operation of micrometer is based on ___RACK__________

PINION_____________

14. 5% of 50% of 600 is ________________

15. In a right angle triangle if one of the angle is 55 Deg., the other two angles are

______________90 AND 35____ Deg.

16. Out of 400 parts, 50 parts are rejected for dimensional variation and 30 parts for

wrong material used, then total percentage of rejections is _0.2%_______________

17. In basic shaft system of fits the higher limit on shaft dia is

TOLLERENCE________________

18. SPC stands for ____STATISTICAL PROCESSCONTROL._______________________________

19. Teflon is a trade name for ___________________________

20. In BEL machined stainless steel parts are given this finishing treatment __________

21. Betascope is used for measuring _________________________

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22. Hook of a lifting crane is made by ___CASTING____________ process

23. Hardness of Rubber is indicated by __VULCANIZATION___________________

24. MRP II stands for ___MATERIAL RESOURCE

PLANNING____________________________

25. The first 4 digits of a 12 digit numbering system indicate__________________

26. The process for producing electrically conductive layer on Aluminium

and Aluminium alloys is called ________________________

27. Intricate profile cutting on 0.1 mm thick metal sheet is possible with _______process

28. Mild steel belongs to the category of ___________________ carbon steel

29. In CNC machines. ATC stands for ____AUTOMATIC TO

CENTER________________________

30. Three wire dia measuring method is used for measurement of __________ of

threads

IV. WRITE SHORT NOTES ON ANY FIVE OF THE FOLLOWING

MARKS 20

1. Methods of joining metals.

2. Cutting Fluids.

3. CNC Machines.

4. MRP II

5. Jig Boring.

6. BEL Standards.

7. Absolutes of Quality as defined in QIT.

8. QCC

9. Cost reduction.

10. TORQUE in BEL.

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MARKS : 20

1. Buffing isa. A process of electroplatingb. Covering a metal part with soft materials to prevent damage.

c. An etching process

d. The process of bringing out the luster of metal.

2. A half nut is

a. Damaged nut. c. Nut manufactured in parts.C. A double start nut for quick shift.

D. Mechanism that locks the lathe carriage to the lead screw for thread cutting

3. While using HSS tools on lathe the cutting speed will be lowest while machining.a. Cast iron b. Brass c. Aluminium d. White metal

4. Lathe bed is made ofa. Mild steel b. Stainless steel c. Alloy steel d. Cast iron

5. Following plates are available for indexing. Which plate would you select whileindexing for 9 divisions.

a. 15 hole circle b. 18 hole circle c. 39 hole circle d. 49 hole circle

6. The backlash between gears is expressed in terms of

a. Clearance between faces of the mating gears.b. The difference between PCD of two gears.

c. Difference between addendum and dedendum.d. None of the above.

7. Hard, tough and fragile metals can be machined bya. Explosive forming. b. Intraform machining.

c. Electrical discharge machining. d. High-energy rate forming.

8. Tumbling is done

a. To clean the surface of small parts.

b. To remove burrs on small parts in large scale.c. To plate the surface. d. To break the material into pieces.

9. Precision is

a. The repeatability of a measuring process.b. Error of judgment in reading on observation.

c. The ability of an instrument to reproduce the same reading under ideal condition.

d. The ability of a measuring device to detect small differences in a quantity beingmeasured.

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10. Coolant used while turning cast iron is

a. Soluble oil. b. Kerosene. c. Trichloroethylene. d. None of the above.

11. Oil-less bearing refers to

a. Journal bearing. b. Ball and roller bearing.

c. Thrust bearing. d. Self-lubricating bearing

12. A dresser is a tool used fora. Sharpening cutting tools. b. Producing knurling.c. Truing grinding wheels. d. Dressing table.

13. Surface roughness on a drawing is represented bya. Circles. B. Squares. C. Curves. d. Triangles.

14. The press operation of folding the edge of the sheet to provide stiffness and smoothedge is known as

a. Bulging. b. Hamming. c. Slugging. d. Lancing.

15. Which on of the following is an advantage of forginga. Good surface finish. b. Improved physical property.

c. Close tolerance. d. Low tooling cost.

16. Electrode gets consumed in the following weld process

a. Spot welding. b. MIG welding. c. Gas welding. d. TIG welding

17. Chemical milling operation is carried out

a. On plain milling machine. b. On universal milling machine.

c. In a tank containing etching solution. d. None of the above machines.

18. The basic purpose of using a flywheel on rotating machinery is toa. Allow rapid acceleration. b. Match output and input.

c. Balance the rotation parts. d. Store and release energy as required.

19. A hot body will radiate most rapidly if its surface is

a. Rough & white. b. Rough & black.c. Polished & black. d. Polished and white.

20. Glass wool is used fora. Mirror. b. Decoration purpose.

c.. Heat insulation. d. Packing material

21. Plastic tubes & pipes are generally made bya. Extrusion. b. Injection moulding.

c. Transfer moulding. d. Compression moulding.

22. Malleability of a material can be defined as

a. Ability to recover its original form.

b. Ability to undergo large permanent deformation under compression.c. Ability to undergo large permanent deformation under tension.

d. All the above.

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23. A sine bar is used for measuring

a. Surface roughness. b. Gear profile. c. Internal tapers. d. External

24. Vendor rating means

a. Determining rate of payment to vendors.

b. Measure of overall performance of vendorsc. Ability of vendors to deliver at short interval.

d. Ability of vendors for timely delivery.

25. Purpose of jigs and fixtures is to

a. Increase production rate. b. Increase machining accuracy.

c. Facilitate interchangeability. d. All the above.

26. Jig boring machines are used for getting

a. Positional accuracy of holes. b. Form accuracy of holes.c. Dimensional accuracy of holes. d. All the above.

27. Company standard for various manufacturing processes are covered

a. WS. b. QS c. PS d. DS

28. An external micrometer is having an error of + 0.03 mm and is used for measuring a

plate of thickness 13.50 mm. The observed reading isa. 13.50 mm b. 13.47 mm c. 13.53 mm d. 13.56 mm

29. If 40 parts are rejected for dimensional variations and 30 parts are rejected for wrongmaterial used, out of 350 parts make then total percentage rejection is

a. 15 b. 40 c. 20 d. 10

30. Aluminium profiles can be economically produced by

a. Die casting b. Extrusion c. Sand casting d. Investment ca

II. Tick (4 ) TRUE or FALSE for any 20 of the following. Each question carriesONE mark. HALF mark will be deducted for wrong answer.

MARKS : 20

1. Angle plate is used for holding angular jobs in milling machine. TRUE / FALS

2. In a center lathe, while turning, power is transmitted by lead TRUE / FALS

screw to the carriage.

3. In climb milling or up-milling work moves in opposite direction TRUE / FALSto the rotation of the cutter

4. Accuracy is he repeatability of a measuring process TRUE / FALS

5. Lancing is a drawing process TRUE / FALS

6. In the case of shaping machine cutting stroke is faster

than return stroke TRUE / FALS

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7. Metric thread is generally specified in TPI TRUE / FALS

8. The function of a chip breaker in cutting tool is to get long

curled chips TRUE / FALS

9. Copper can be easily spot welded TRUE / FALS

10. Ultrasonic machining is best suited for brittle materials TRUE / FALS11. Induction hardening is used for hardening gear teeth TRUE / FALS

12. NC paint is cured by staving in the oven TRUE / FALS

13. Cast iron is malleable material TRUE / FALS

14. Pressure pads in blanking and piecing press tools are madeof OHS material TRUE / FALS

15. Aluminium parts are anodized for better surface conductivity TRUE / FALS

16. Diamond tipped cutting tools are used for obtaining high

surface finish TRUE / FALS

17. In cutting tool materials HSS is harder than satellite TRUE / FALS

18. Aluminium parts cannot be silver plated TRUE / FALS

19. ECR requests are raised by shop executives only TRUE / FALS

20. Mild steel can be hardened TRUE / FALS

21. Seamless steel pipes are produced by welding process TRUE / FALS

22. Thread angle in American Std. Unifieds thread 55 degrees TRUE / FALS

23. Compression spring will have hooks at the ends TRUE / FALS

24. phosphor bronze strips are not recommended for springs TRUE / FALS

25. ISO 9000 quality system is a pre-requisite to enter into theexport market TRUE / FALS

26. In BEL, QCC presentations are accounted during financial year TRUE / FALS

27. Helicoil inserts are used mainly in hard materials to avoid

thread damage TRUE / FALS

28. In BEL, April month is celebrated as quality month TRUE / FALS

29. Sampling inspection technique is best suited for bulk production TRUE / FALS

30. Silver solder material is used for soldering TRUE / FALS

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III. FILL IN THE BLANKS WITH CORRECT ANSWERS FOR ANY TWENTY

OF THE FOLLOWING.

MARKS 20

1. H7/h6 tolerances are applied for hole and shaft to achieve ____________ fit

2. Thrust bearings are used for absorbing ________________ load.

3. Total surface area of a cube having a side of 6 mm is ___________ sq. an.

4. The formula for volume of a cylinder with diameter `d and height `h is __________

5. In CNC machine ATC stands for ______________________

6. Sand blasting is usually done to remove _____________ and ____________ on thecasting surface

7. In project planning PERT stands for _______________________

8. Nickel silver contains _______________________

9. One cm equals _____________ microns

10. Betascope is used for measuring _________________

11. The first 4 digits of 12 digit numbering system in BEL indicates ___________

12. In quality system SPC stands for ________________________

13. Large speed reduction in perpendicular drive transmission is obtained to __________

14. In the basic hole system of fits the lower tolerance on the dia is _____________

15. Included angle of a drill bit is generally _________________ degrees

16. In 48 A 100-II-8-S-BE grinding wheel the type of bond used is _______________

17. Three wire measurement method is used for measuring ___________________

18. Major alloying elements of bronze are _______________ and _____________

19. In CBN coated tools CBN stands for ________________________

20. Hardness of rubber is indicated by ________________________

21. In the case of blanking tool cutting clearance is given on _________________

22. The principle of operation of micrometer is based on _________ and __________

23. Lead of a triple start thread screw is 3X ________________

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24. A bore of dia 146/mm in a part can be measured by using _________ (instrument)

25. Weight of a steel square bar of 100 mm x 100 mm cross section and 2 mtr.

length, whose specific gravity is 7800 kg/cubic metre is ____________ kg.

26. Bore size of a part is specified as 30.0 +0.015,-0.005 mm in the drawing. If theplating thickness specified is 10 microns, the bore size to be maintained while

machining is ____________________

27. Set-up time is 3 hours, per piece time is 0.1 hour, if the efficiency of the operator is

50% then the actual time taken for producing 120 pieces is __________ hours

28. The document against which material is drawn from holding stores is __________

29. The sum of all angles of a right-angled triangle is ____________ degrees

30. In BEL compressed air is supplied at a pressure of _________ kg/sq.cm and

____________________ kg/sq. cm through the main lines

IV. WRITE SHORT NOTES ON ANY FIVE OF THE FOLLOWING

MARKS 20

1. The `ABSOLUTES of `QUALITY as defined in QIT

2. Methods of joining materials

3. ISO 9000 Quality Management system

4. CNC machines

5. MRP II

6. Productivity improvement

7. Value engineering

8. Cutting tool materials

9. Inventory control

10. Non Destructive Testing

11. BEL standards

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1999 - Mechanical - Part 2

I. Choose the correct answer and indicate (4 ) for any TWENTY of the following:Marks: 20

1. The property of a material which enables it to be drawn into wires with theapplication of a tensile force is calleda. Plasticity b. Elasticity c. Ductility d. Malleability

2. The algebraic difference between the maximum limit and the basic size is calleda. Lower deviation b. Upper deviation c. Actual deviation d. Mean deviation

3. The function of a plain washer is toa. Fill up the axial gap b. Provide bearing area

c. Provide cushioning effect d. Absorb shocks & vibrations

4. Idler pulley is used fora. Increasing velocity ratio b. For applying tension

c. Changing the direction of motion of the belt d. All of the above

5. Cast iron is a

a. Ductile material b. Malleable material c. Brittle material d. Tough mater

6. The increase in hardness due to cold working is called

a. Age hardening b. Work hardening c. Induction hardening d. Plane ha

7. The operation of producing cup shaped parts from flat sheet metal blanks by bending

and plastic flow of metal, in known asa. Drawing b. Embossing c. Coining d. None of the above

8. Blanking & piercing operations can be performed simultaneously in a

a. Simple die b. Progressive die c. Compound die d. Comb

9. The electrodes used in spot welding have a tip of

Stainless steel b. Aluminium c. Copper alloy d. Brass

10. The acetylene gas is stored in cylinders in

a. Solid form b. Gaseous form c. Liquid form d. Any one

11. The instrument used to measure external & internal diameter of shafts, thicknessof parts & depth of holes is

12. When the dimension is expressed as 20.00 +0.035/-0.025 then the tolerance isa. 0.035 mm b. 0.025 mm c. 0.01 mm d. 0.06 mm

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13. Cast iron during machining produces

a. Continuous chips b. Discontinuous chipsc. Continuous chips with built-up edge d. None of the above

14. Cutting fluids are used to

a. Cool the tool & work piece b. Improve surface finishc. Lubricate & reduce friction d. All of the above

15. In drilling operation the metal is removed bya. Shearing & compression b. Compression

c. Extrusion d. Shearing & extrusion

16. The operation of smoothing & squaring the surface around the hole is known as

a. Counter sinking b. Counter boring c. Trepanning d. Spot facing

17. In which of the following machine does the work rotate & the tool is stationary

a. Vertical boring machine b. Horizontal boring machine

c. Precision boring machine d. Jig boring machine

18. The method of grinding used to produce a straight or taped surface on a work piece

is

a. Internal cylindrical grinding b. Form grindingc. External cylindrical grinding d. Surface grinding

19. The process of removing metal by a cutter which is rotated against the directionof travel of the work piece is called

a. Up milling b. Down milling c. Face milling d. End milling

20. The operation of producing grooves around the periphery of a cylindrical or

conical work piece is calleda. Profile milling b. Gang milling c. Saw milling d. Helic

21. Product layout is used for

a. Job production b. Batch production c. Mass production d. None of th

22. The height of each tooth of a broach is

a. Same through out b. In progressively decreasing order

c. In progressively increasing order d. None of the above

23. Which of the following statement is correct about EDM machining

a. It can machine the hardest materialb. It produces a very high degree of surface finishc. The tool & work are never in contact with each other

d. All of the above

24. The Acceptance sampling is used in

a. Job production b. Batch production c. Mass production d. All of

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25. The aim of value engineering is to

a. Find the depreciation value of a machineb. Determine the selling price of a product

c. Minimise the cost without change in quality of product

d. All of the above

26. In piercing operation, the clearance is provided on

a. Punch b. Die c. half on the punch & half on the died. Either on punch or die

27. The work study is done by means of

a. Planning chart b. Process chart c. Stop watch d.

28. Out of 400 parts inspected 40 parts are rejected for material defect, 30 parts rejected

for poor finish & 30 parts rejected for dimensional variation. The total rejectionpercentage is

a. 30% b. 2.5% c. 255 d. 18%

29. The outside diameter of a shaft measures dia 7.0 +0.015 0.005 after plating Ag 15. Thediameter to be maintained while machining is

a. 7.0 0.005 0.025 b. 7.0 0.015 0.035 c. 7.0 +0.000 0.020 d.7.0 0.015 0.020

30. How many parts of size 20 mm x 30 mm can be sheared / cut for a sheet size

1.8 M X 1.2 M

a. 3000 b. 360 c. 3600 d. 2600

II. Tick TRUE or FALSE for any Twenty of the following: Marks: 20

1. Aluminium is lighter than copper TRUE/FALSE

2. In heat treatment rapid cooling results in hard structure TRUE/FALSE

3. The hardness obtained from a given heat treatment depends on the carbon

content, quenching rate & the work size TRUE/FALSE

4. The steel used for case hardening is normally a low carbon steel

of about 0.15% to 0.20% carbon TRUE/FALSE

5. Thermo plastic materials undergo no chemical change in moulding TRUE/FALSE

6. Neoprene rubber is a synthetic rubber TRUE/FALSE

7. In brazing the filler metal is distributed between the joint surface

by capillary action TRUE/FALSE

8. In brazing process the metal parts are joined by non-ferrous metals TRUE/FALSE

9. Higher current densities are required for metals having higher

conductance TRUE/FALSE

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10. The whitworth thread has an angle of 60 degrees TRUE/FALSE

11. Consumable electrode is used in Argon Arc welding TRUE/FALSE

12. In cold worked metal the grain structure is distorted TRUE/FALSE

13. For bending operation the required pressured is directly proportionalto the tensile strength of the material TRUE/FALSE

14. To reduce the shear force the punch or die should be made at an

angle so that the cutting action is progressive TRUE/FALSE

15. Spring back may be corrected by over bending an amount such that

when the pressure is released the part will return to its correct size TRUE/FALSE

16. Carbide cutting toll inserts are made only by powder metal lurgy

technique TRUE/FALSE

17. AOL 3% means accept 3 number in 100 parts TRUE/FALSE

18. Variations due to assignable causes can be eliminate TRUE/FALSE

19. Square threads are not suitable for transmitting power TRUE/FALSE

20. In milling, feeding the work against the direction of cutter

rotation is usually recommended practice TRUE/FALSE

21. The advantages of helical gears over spur gears is that they are

smooth acting & noiseless TRUE/FALSE

22. In centreless grinding both the wheels rotate in the same direction TRUE/FALSE

23. The drill bit lip angle should be smaller for soft metals & higher

for hard metals TRUE/FALSE

24. Tempering reduces brittleness & increases toughness TRUE/FALSE

25. Quality control & inspection are not the same TRUE/FALSE

26. In metal inert Gas (MIG) welding the electrode is not consumable TRUE/FALSE

27. Self-centering or universal chuck are one & the same TRUE/FALSE

28. To cut right hand threads, direction of job & lead screw rotationshould be in the same direction TRUE/FALSE

29. When ten divisions of the vernier scale correspond in length to nine

divisions of the main scale TRUE/FALSE

30. Alloys are generally stronger & harder than their parent metals TRUE/FALSE

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III. Fill in the blanks (Any TWENTY of the following)

Marks: 20

1. The lead of a 5 mm pitch, 3 start thread would be ________________

2. Ratio of pitch diameter to number of teeth in gear is defined as ___________

3. In flame cutting, gases generally used are _____________ & ______________

4. In a dividing head of a milling machine having gear ratio 40 : 1 to mill 5

equi-spaced slots, indexing required is ______________________

5. Truing of grinding wheel is carried out with ___________________

6. For welding stainless steel & non-ferrous metals such as aluminium, weldprocess is called as _________________

7. In drilling operation, the rate at which the drill advances into the work in one

revolution is called _________________

8. To grind copper, aluminium, rubber etc. the grinding wheel used is of ________

abrasive grain

9. The heat treatment process aimed to relieve internal stresses & to increase

toughness in hardened steel is called as ___________________

10. Nitriding is a ______________ process used to produce an exceptionally

hard surface, on certain alloy steel parts which have been previously machined

11. The principle elements in high speed tool steels are _______________ & ________

12. Dial indicator is generally used for ________________

13. Supply pressure of compressed air for CNC machine is around ____________

kg/sq. cm

14. For making piercing punch the material generally used is _______________

15. For making punch holder material generally used is _______________

16. Shield gas used in TIG welding is ______________

17. Sine bar is used for measuring _____________

18. QIPM means ___________________

19. ____________ mechanism is used in engraving machine

20. First 4 digits of a 12 digit numbering indicate the ______________ code

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21. ___________ gives issue level of various reference documents

22. Spot welding tips used for MS welding are an alloy of _________ & ________

23. One micron equals _____________ mm

24. Arc blow is experienced in ___________ welding equipment

25. Conductive coating done for aluminium & aluminium alloys is _______________

26. Stainless steel is resistant to corrosion due to the presence of ___________ &

____________________

27. Generally the profile of gear tooth is a _____________ curve

28. 30% of 12.4 is _____________

29. Material generally used for forming & bending tools is ________________

30. For checking accuracy of external micrometer ____________ gauge is used

IV. Write short Note on any FIVE of the following:

Marks 20

1. Fits & tolerances2. Seven tools of QCC

3. Advantages of CNC machining

4. Quality improvement process

5. Vendor rating

6. Preventive maintenance7. Non-conventional machining methods

8. BEL standards

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MARKS : 20

1. The process of improving the cutting action of a grinding wheel is calleda. Truing b. Dressingc. Facing d. Clearing

2. The hardness of a grinding wheel is specified bya. BHN b. Rockwell hardness number

c. Vickers pyramid number d. Letter of alphabet

3. The cutting speed of a drill bit depends upon the

a. Material of drill bit b. Type of material to be drilled

c. Quality of surface finish desired d. all of the above

4. In blanking operation the clearance is provided on

a. Punch b. Die

c. Half on the punch & half on the die d. Neither of the above

5. Blanking and piercing operations can be performed simultaneously in a

a. Simple die b. Extrusion diec. Compound die d. Combination die

6. Bronze is an alloy ofa. Copper & Zinc b. Copper & tin

c. Copper, tin & Zinc d. none of the above

7. Heat treatment process used for softening Hardened steel is

a. Carburising b. Normalizing

b. Annealing d. Tempering

8. The ductility is the property of a material by which it

a. Can be draw into wiresb. Breaks with little permanent distortion

c. Can be rolled or hammered into thin sheets

d. Can resist fracture due to high impact loads

9. Standard time is equal to

a. Normal time minus allowances

b. Normal time plus allowancesc. Representative time multiplied by rating factor

d. Normal time taken by an operation

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10. In milling, the process of removing metal by a cutter which is rotated in the same

direction of travel of the work piece is calleda. Up milling b. Down milling

c. Face milling d. End milling

11. In lapping operation the amount of metal removed isa. 0.005 to 0.01 mm b. 0.01 to 0.1 mm

c. 0.05 to 0.1 mm d. 0.5 to 1 mm

12. Trepanning is an operation of

a. Make a cone shaped enlargement at the end of hole

b. Smoothening & squaring the surface around a holec. Sizing and finishing a small diameter hole

d. Producing a hole by removing metal along the circumference of a hollow cutting

tool

13. For machining, in which of the following materials is the cutting speed minimum

when using a HSS tool

a. Cast iron b. MSc. Brass d. Aluminium

14. The chuck used for setting up heavy and irregular shaped work should bea. 4 Jaw independent chuck b. 3 Jaw universal chuck

c. Magnetic chuck d. Drill chuck

15. The following gas is used in Tungsten Inert Gas Welding

a. Carbon-dioxide b. Argon

c. Oxygen d. Hydrogen

16. In a bi-lateral system of tolerance, the tolerance is allowed ona. One side of actual size b. One side of the nominal size

c. Both sides of nominal size d. none of the above

17. Flux commonly used in brazing is

a. Zn C12 b. NH4 C1c. Rosin plus alcohol d. Borax

18. Document against which materials are drawn from storesa. ICRR b. STV

c. PR d. SR

19. Company standards for various manufacturing processes are covered undera. WS b. PS

c. QS d. DS

20. Formula for volume of cylinder having radius `r and height `h is

a. 1/3 r2 h b. 4/3 r 3 h

c. r2 h d. 2 r h

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21. Temperature of soldering bath maintained in wave soldering machine is

a. 4000 C b. 2450 Cc. 2600 F d. 1500 C

22. An external micrometer is having error of +0.03 mm and is used for measuring a

plate of thickness 13.50 mm. The reading measured isa. 13.50 b. 13.53

c. 13.47 d. 13.56

23. If 40 parts are rejected for dimensional variations and 30 parts are rejected for wrong

material use out of 350 parts made, then total percentage rejection is

a. 15% b. 20%c. 40% d. 10%

24. If the setup time is 1.5 hrs and per piece time is 0.2 hrs, the actual time taken at 50%efficiency for making 100 pieces is

a. 21.5 hrs b. 43 hrs

c. 34 hrs d. 25 hrs

25. Aluminium profiles can be economically produced by

a. Die casting b. Sand casting

c. Extrusion d. investment casting

26. Fettling is an operation performed

a. Before casting b. During castingc. After casting d. After heat treatment

27. Which of the following is gear cutting operation

a. Hobbing b. Shaping

c. Milling d. Shaving or burnishing

28. Chemical milling operation is performeda. On plain milling machine b. On universal milling machine

c. as on etching task having agitator facility d. none of the above

29. Which of the following processes would remove least material

a. Grinding b. Lapping

c. Honing d. Super finishing

30. V-block is used in the workshop to check

a. Roundness of a cylindrical work b. Surface roughnessc. Dimensions of oval job d. Taper on a job

31. H7 and h6 tolerances are applied for holes and shafts respectively to achieve

a. Press fit b. Drop fitc. Force fit d. Sliding fit

32. Teflon is a trade name fora. Nylon b. PTFE

c. PPS d. None of the above

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33. HSS belongs to category of

a. Low carbon steel b. Alloy steelc. Medium carbon steel d. None of the above

34. Composition of normal silver solder is

a. Silver, copper, zinc b. silver, nickel, leadc. Copper, tin d. None of the above

35. The sum of the angles of a triangle isa. 1800 b. 900

c. 2700 d. 3600


candidate answers more than 20 questions, only the first 20 questions answered

will be considered.

MARKS : 20

1. One HP is equal to 646 Watts. TRUE/FALSE

2. Pyrometer is used to measure vaccum TRUE/FALSE

3. Titanium carbide is slightly harder than diamond TRUE/FALSE

4. In a gear, diametral pitch is equal to the pitch diameter multipliedby the number of teeth TRUE/FALSE

5. Worm and worm wheel is used where high reduction ratio

is required TRUE/FALSE

6. Anodised surface is a conductive coating TRUE/FALSE

7. For saltspray testing sodium cyanide solution spray is normally used TRUE/FALSE

8. The standard deviation gives a measure of dispersion TRUE/FALSE

9. Arc welding can be operated with AC or DC current TRUE/FALSE

10. The property of a cutting tool to retain its hardness at high

temperature is called Hot hardness TRUE/FALSE

11. Cast iron is superior in withstanding compressive load TRUE/FALSE

12. The limit systems followed in fits and tolerance is ISI system TRUE/FALSE

13. The clearance between punch and die of a blanking tool depends

on the thickness of material TRUE/FALSE

14. solder is mainly an alloy of lead and tin TRUE/FALSE

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15. An example of resistance welding is oxy-acytelene welding TRUE/FALSE

16. German silver is an alloy of copper, zinc and nickel TRUE/FALSE

17. Steel that has been hardened by rapid quenching is brittle TRUE/FALSE

18. Induction heating can be used for many surface hardeningoperations TRUE/FALSE

19. Carbide cutting tool inserts are made by powder metallurgy

techniques TRUE/FALSE

20. The flutes in a drill bit can be straight or helical TRUE/FALSE

21. Silicon carbide grinding wheels are recommended for

grinding cast iron TRUE/FALSE

22. Angle milling cutter can be used for cutting dovetails TRUE/FALSE

23. AQL stands for Agreed Quality Limit TRUE/FALSE

24. The surface of gear tooth below the pitch circle is called Addendum TRUE/FALSE

25. The function of a Flywheel is to allow rapid acceleration TRUE/FALSE

26. Productivity is different from production TRUE/FALSE

27. For project scheduling either CPM or PERT charts can be used TRUE/FALSE

28. The general rule of grinding is hard wheel for hard work and soft

wheel for soft work. TRUE/FALSE

29. Stainless steel is mainly an alloy of nickel and vanadium TRUE/FALSE

30. In quality control SPC stands for statistical problem control TRUE/FALSE

31. Pressure pads are used in drawing operation to keep the materialflat and eliminate wrinkles TRUE/FALSE

32. JIT system leads to reduced inventory TRUE/FALSE

33. Punches and dies are generally made of silver steel TRUE/FALSE

34. One micron is equivalent to 0.01 mm TRUE/FALSE

35. In spark erosion machining graphite can be used as an electrode TRUE/FALSE

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III. Fill in the blanks for any 20 of the following. Each question carries ONE mark.

In case any candidate answers more than 20 questions, only the first 20

questions answered will be considered.

MARKS : 20

1. For the spot welding of Aluminium material the tips used are an alloy of _________and ________________

2. The property of metal by virtue of which the body / metal returns to itsoriginal shape after removal load is called _____________________

3. If the efficiency is 60% and allowed time is 9 hrs then the actual time is _________

4. The bore size of a bush is 10.0 and plating is Zn 15. The bore size to be maintained

is ___________________

5. Blanking force is equal to _____________ stress x ____________

6. Surface speed is given by the formula ____________

7. 25% of 18.2 is _______________

8. If setup time is 2 Hrs, operation time is 10 minutes for 24 pieces, the total standard

hours for 120 pieces is ________________

9. If 200 mm is measured as 210 mm, the error is ____________ per cent

10. The term used for distance between the two consecutive teeth in the gear is

___________________

11. O This symbol on the drawing represents _______________

12. OARC stands for _____________

13. Blanking and piercing can be simultaneously performed in one __________ tool

14. In climb milling cutter the job moves in ________________ direction

15. ___________ material is deposited in galvanising

16. Betascope is used for measuring _____________

17. 18-4-1 steel is known as _____________

18. An eyebolt or hook of a crane is made by ____________ process

19. Chemical blackening finish is widely used on ___________ parts

20. Hardness of rubber is indicated by ________________

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21 In blanking operation clearance is provided in ________________

22. In a machine tool lubricant is used for _______________

23. Aluminium is available in its natural form as _________________

24. In planning machine ____________ is stationary

25. In project planning PERT stands for ________________

26. The bearing used for absorbing axial load is ______________

27. BHN means ____________________

28. MRP stands for _______________

29. Argon gas is used in TIG welding for ______________ purpose

30. The first four digits of 12 digit numbering system indicate ______________

IV. Write short notes on any FIVE MARKS : 20

1. ISO 9002 quality system

2. EDM Machining

3. Design of a simple draw tool

4. Inventory control

5. MRP II

6. Basic steps involved in making a spot weld

7. Q.C.C

8. ORQUE in BEL

9. Productivity

10. Value Engineering

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MARKS : 20

1. H7 and H6 tolerances are applied for hole and shaft to achievea) Press fit. b) Interference fit.c) Loose fit. d) Sliding fit.

2. The whitworth thread has an angle ofa) 50 degrees b) 55 degrees

c) 60 degrees d) 65 degrees

3. The general rule of grinding is

a) Hark wheel for hard work b) Soft wheel for soft work

c) Soft wheel for hark work d) Non of the above

4. Normal HSS tool contains

a) 4% Tungsten b) 8% Tungsten

c) 18% Tungsten d) 28% Tungsten

5. In down milling the chip thickness is

a) Maximum near the tooth entrance b) Nil at the tooth entrancec) Constant throughout d) None of the above

6. In drawing operation pressure pads are used to

a) Keep the material flat and eliminate wrinklesb) Increase pressure on the punch

c) Increase pressure on the died) Increase the life of the tool

7. Generally cast iron is machined with

a) Soluble oil b) Kerosene

c) Cutting oil d) No cutting fluid

8. In a grinding wheel the degree of hardness possessed by the bond is called

a) Grit b) Gradec) Rockwell d) Vickers

9. An example of resistance welding isa) Oxy acetylene welding b) Arc weldingc) Spot welding d) TIG welding

10. In metal cutting continuous chips are normally formed when the material isa) Ductile b) Brittle

c) Hard d) Tough

11. Honing is basically a

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a) Roughing operation b) Chemical operation

c) Gear cutting operation d) Finishing operation

12. Stainless steel contains

a) Nickel and Vanadium b) Nickel and Tungsten

c) Tungsten and Chromium d) Chromium and Nickel

13. Bearing used for absorbing pure axial load isa) Journal bearing b) Needle bearingc) Thrust bearing d) Roller bearing

14. In a cam motion the zero displacement position of the follower is calleda) Return b) Rise

c) Dwell d) wedge

15. The carbon percentage in cast iron is usually between

a) 0.1 to 0.5% b) 0.5 to 1%

c) 2 to 4% d) 5 to 10%

16. Bakelite belongs to the following category

a) Thermoplastic b) Thermosetting

c) Thermo fusing d) None of the above

17. Accurate measurement of angles is possible with

a) Micrometer b) Dial Indicator c) Spirit level c) Sine bar

18. The total surface area of a cube whose one side is 6 mm is

a) 30 sq mm b) 144 sq mm

c) 72 sq mm d) 216 sq mm

19. The diameter of the driver pulley is 50 mm and the driven pulley is 100 mm. If therpm of driver is 50 rpm what is the rpm of driven pulley?

a) 100 rpm b) 50 rpm

c) 25 rpm c) 75 rpm

20. SPC stands for

a) Statistical product control b) Statistical process controlc) Statistical physical control d) None of the above

21. Out of 500 parts inspected 35 parts are rejected for deep cutter marks and 25 partsrejected for material defect. The total rejection percentage isa) 35% b) 25%

c) 14% d) 12%

22. Area of a circle is

a.) r 2 b) 2r

c) r d) r 3

23. The standard deviation gives a measure of

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a) Average b) Dispersion

c) Median d) None of the above

24. MRP II stands for

a) Material Resource Planning b) Material Requirements Planning

c) Material Release Planning d) Material Roll on Planning

25. If a machine is used for 16 hours a day, for 20 days and remaining 5 days themachine was under preventive maintenance then the machine utilization isa) 40% b) 60%

c) 70% d) 80%

26. Which of the following is different from the remaining

a) Drilling b) Boring

c) Reaming d) Knurling

27. The most suitable material for making electrode in spark erosion is

a) Iron b) Aluminium

c) Tungsten Copper d) Teflon

28. The limit system followed in fits and tolerances is

a) ISI system b) ISO systemc) PSI system d) PIS system

29. For every high volume production of blanks the most suitable tools area) Draw tools b) Compound tools

c) Progressive tools d) Extension tools

30. The material that has best conductivity in the following is

a) Copper b) Aluminiumc) Steel d) Silver



will be considered.

MARKS : 20

1. Argon arc welding is preferred for welding mild steel joints.

TRUE / FALSE

2. Soft jaw chucks are used in centre lathes to compensate for

vibration of machines. TRUE / FALSE

3. A shaping machine is used to shape complicated and intricate jobs.

TRUE / FALSE

4. In multi start thread, pitch and lead are the same. TRUE / FALSE

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5. Reaming is dome to remove burrs generated in drilling. TRUE / FALSE

6. Module is the reciprocal of diametrical pitch. TRUE / FALSE

7. Sampling inspection will not allow defective parts to pass

through nest operation. TRUE / FALSE

8. Embossing operation cannot be done on widematic CNC turretpunch press. TRUE / FALSE

9. In heat treatment, induction heating is unsuitable for

surface hardness. TRUE / FALSE

10. Anodized surface is a conductive coating. TRUE / FALSE

11. Worm and worm wheel are used where high reduction

ratio is required. TRUE / FALSE

12. Ford cup is used to measure the viscosity of paints. TRUE / FALSE

13. Stellite is not a good cutting tool material. TRUE / FALSE

14. In a product layout, machines of same types are grouped

together in one area. TRUE / FALSE

15. Pure copper is used in the manufacture of spot welding tips. TRUE / FALSE

16. Quick return motion mechanism is used in a shaping machine. TRUE / FALSE

17. Bevel gears are used to transmit rotary motion betweentwo shafts, which are parallel. TRUE / FALSE

18. Production and productivity are one and the same. TRUE / FALSE

19. Electric discharge machine requires dielectric media. TRUE / FALSE

20. Cold form tapping removes material. TRUE / FALSE

21. Feeler gauge is used to measure the thickness of material. TRUE / FALSE

22. Chemical milling creates heavy stress in part machined. TRUE / FALSE

23. Helicoils are used in tapped holes of softer materials. TRUE / FALSE

24. In centreless grinding the feed of the job is achievedby indexing the control wheel. TRUE / FALSE

25. Brass is an alloy of Zinc and Tin. TRUE / FALSE

26. Aluminium parts can be silver plated. TRUE / FALSE

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27. Nitro cellulose painted parts have to baked at 1800C for an hour. TRUE / FALSE

28. Air filter is used to minimize the pressure in the

TRUE / FALSE

29. ISO 9000 stands for set of Indian Standards dealing with Quality system.

compressed air lines. TRUE / FALSE

30. 30 Tons press weighs 30 tons. TRUE / FALSE




MARKS : 20

1. The included angle of a standard drill bit is _____________________

2. In up milling, the cutter and the job move in ___________________ direction.

3. Metric threads have and included angle of _________________

4. In CNC machining ATC stands for ____________________________

5. Large quantity precision aluminiun castings are made by ______________ process.

6. The main function of a fixture is to _______________________________ the job.

7. ___________________ are the type of gears used to drive the shafts perpendicular toeach other.

8. The distance through which a screw thread advances axially in one turn is called __

9. The size of the pilot hole for tapping M8 threads is ________________

10. The total tolerance of a dimension 12.50 mm + 0.25, - 0.15 is ______________

11. The main funcion of a fixture is to ________________________________ the job.

12. The first four digits of 12 digit numbering system indicate the ____________ code

13. The issue level of all reference drawings are indicated in ________________ sheet.

14. Bronze is an alloy of ________________ and _____________________

15. Spot welding tips for welding aluminiun parts in and alloy of copper and _________

16. __________________ material is deposited in galvanizing.

17. Silver plating is done to increase the __________________ of the base material.

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18. SQC stands for _________________________________________

19. The shield gas used in case of TIG welding is _________________________

20. 18 4 1 Steel is known as ___________________________

21. Sine bar is used to measure ____________________________

22. Teflon is a trade name for ______________________________

23. _____________________ Mechanism is used in engraving machine.

24. Sand blasting is used to remove ___________ and ________________from surface.

25. In sheet metal, large size holes can be executed by ___________________ process.

26. In project planning, CPM stands for ______________________________

27. ABC analysis is used to control ____________________________

28. The finish given for stainless steel parts is ___________________________

29. Gap between punch and die is known as _______________________

30. CNC stands for _______________________________________

IV. Write short notes on any FIVE MARKS : 20

1. Cutting tool materials.

2. Quality Surveillance.

3. ISO 9000 Quality system.

4. Non-conventional machining methods.

5. Five basic steps in making a spot weld.

6. Simple, Compound and Progressive tools.

7. Disposal of in process non-conforming materials.

8. Seven tools of QCC.

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MARKS : 20

1. For welding of stainless steal the gas used isa. CO2 b. Argon c. Hydrogen d. Nitrogen

2. The diameter of 18 gauge wire is

a. 0.6mm b. 1.2mm c. 1.8mm d. None of these

3. Diamond Cone indentation is used to measure

a. BHN b. VHN c. Rockwell Hardness d. None of these

4. Nickel Silver Contains

a. Nickel & Silver b. Nickel & Brass

c. Nickel & Bronze d. None of these

5. Change Proposal is raised by

a. Fabrication b. Assemblyc. Production control d. None of these

6. Machine loading is done bya. Floor planning b. Assembly planning

c. Production control d. None of these

7. ICRR is prepared by

a. F.G. stores b. I.G storesc. Production control d. None of these

8. None conventional source of energy used in BEL is

a. Wind b. Solar c. Biogas d. None of these

9. Quality is

a. Measure of rejection b. Fitness for use

c. Conformity to specification d. None of these

10. Which of the following is different from the remaining

a. Drilling b. Boring c. Reaming d. Knurling

11. Type of raw material stored in stores is identified by

a. Bin card b. Color code c. Tag d. None of these

12. 1/4 + 2/4 + is equal to

a. 1 b. 2 c. 3 d. None of these

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13. Standard time is

a. Normal time plus allowance b. Time taken by normal workerc. Actual time taken for the job d. None of these

14. If the dimension 200mm measures 210mm the error is

a. 8% b. 10% c. 5% d. 20%

15. Spot welding is done by passinga. High voltage b. High current c. High pressure d. None of these

16. If the efficiency of the operator is 60% and allowed time is 13 hours then the actual

time taken isa. 108 hours b. 36 hours c. 30 hours d. None of these

17. Sampling plans are defined in BEL standardsa. PS 9000 b. QS 9000 c. ISO 9000 d. None of these

18. Galvanising process is

a. Zinc plating b. Zinc sprayingc. dipping in molten zinc d. None of these

19. Ergonomics is the study ofa. Economics of engineering b. Human engineering

c. Engineering Mechanics d. None of these

20. Widely used aluminium alloys for pressure diecasting are

a. LM6 & LM 24 b. HS30 c. NS4 d. None of these

21. Dielectric materials are

a. Conductors b. Semi-conductorsc. Super conductors d. Insulator

22. Function of spring is to

a. Reduce vibration b. Prevent loosening

c. Increase strength d. Easy removal

23. The clearance between punch and die of a press tool depends on

a. Thickness of material b. Hardness of materialc. Shearing strength of material d. None of these

24. Perimeter of a circle is equal toa. r2 b. 2 r c. r d. None of these

25. Generally for gas welding the type of flame used is

a. Oxidising flame b. Neutral flamec. Carborising flame d. None of these

26. Aluminium profiles can be economically produced bya. Sand casting b. Diecasting

c. Extrusion d. machining

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27. The purpose of the balls at the end of the arm of a fly press is to

a. Store energy b. Produce more pressurec. Balance the arm d. None of these

28. Advantage of CNC machining is

a. Reduction of manhours b. Ease of operationc. Consistency of product d. None of these

29. The type of gears used for transmitting rotary motion between two shafts whose axisare perpendicular

a. Each other b. Bevel gears c. Helical gears d. None of these

30. The smallest size of drawing used in BEL

a. AO size b. A1 size c. A2 size d. A4 size



will be considered.MARKS : 20

1. Blanking pressure = Ultimate shear stress x area being sheared TRUE / FALSE

2. When punched hole is desired the punch is made to the size of hole with clearance

on the die TRUE / FALSE

3. The length of the neutral axis remains unchanged during bending TRUE / FALSE

4. Ductile material is not suitable for deep drawing TRUE / FALSE

5. Cutting speed is given by formula DN/100 TRUE / FALSE

6. Module is the reciprocal of diametral pitch TRUE / FALSE

7. Self centering chuck is used for holding jobs of irregular shape TRUE / FALSE

8. Turret and capstan lathes are production lathe TRUE / FALSE

9. Drilling machine apindies have more taper TRUE / FALSE

10. PARETO principle is vital few and trivial many TRUE / FALSE

11. Chemical blackenise is done on steel parts prior to painting TRUE / FALSE

12. Worm and worm wheel is used where large reduction ratiois required TRUE / FALSE

13. Alodine and anodizing are one and the same TRUE / FALSE

14. Hardness of rubber is indicated by BHN TRUE / FALSE

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15. Quick return mechanism is used in shaping machine TRUE / FALSE

16. Thermoplastic materials are those, which can be softened and re-softened on

application of heat TRUE / FALSE

17. The most common pressure angle used in gear manufacture is 20 TRUE / FALSE

18. Colour code for raw material is made to identify the size of material TRUE / FALSE

19. Machines of same type are grouped together in one area in a

product layout TRUE / FALSE

20. Brass is an alloy of zinc & tin TRUE / FALSE

21. The trade name of PTFE is Teflon TRUE / FALSE

22. Broach is a multiple edged cutting tool TRUE / FALSE

23. Honing is used to finish & polish, bored & reamed holes TRUE / FALSE

24. When bending, the metal is stressed in tension only TRUE / FALSE

25. Electric discharge machine requires dielectric medium TRUE / FALSE

26. A plane intersecting a cone perpendicular to its axis produces aparabola TRUE / FALSE

27. Rack is a gear of infinite diameter TRUE / FALSE

28. In centreless grinding the feed of the job is achieved by incliningthe control wheel. TRUE / FALSE

29. Pitch is the distance between any two threads of a screw TRUE / FALSE

30. Bending tools on made of OHS TRUE / FALSE




MARKS : 20

1. 100 kilograms is equal to ___________________ 1bs.

2. OFHC stands for ____________________

3. Brass is an alloy of ___________________ & _______________

4. VHN stands for _________________

5. EDM stands for ___________________

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6. The profile of gear tooth normally conforms to _______________ curve

7. The module of gear having 34 teeth and a PCD of 17 mm is ___________

8. The area of A4 size drawing is _______________ the area of A2 size drawing

9. In a press tool blue steel is used to _________________

10. ________ software is sued commonly used to make drawings on personal computer

11. The issue level of all reference drawings are indicated in _____________ sheet

12. The dia of pilot hole for m4 tapping is _________________

13. QAR stands for __________________

14. Drill bushes are made from _____________ steel

15. ABC analysis is normally used to control ____________

16. Manufacturing estimates are made by ___________ department

17. The first four digits of 12 digit numbering system indicates ____________ code

18. The sum of the included angles of a parallelogram is equal to ________ degrees

19. OARC stands for ________________

20. One micron is equal to ____________ mm

21. In CNC machining ATC stands for ________________

22. XRF equipment is used for checking the thickness of _______________

23. Spot welding tips of welding of aluminium is an alloy of copper & ___________

24. WIP stands for _________________

25. SQC stands for ________________

IV. Write short notes on any FOUR MARKS : 20

1. Quality alert report

2. Process layout and product layout3. Arc welding and gas welding

4. Value engineering

5. Tolerance and allowance6. Preventive maintenance

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MARKS : 20

1. Included angle of a standard drill bit isa) 60 degree b. 90 degreec) 118 degree d. 125 degree

2. Hole diameters can be measured accurately usinga. Internal micrometer b. Vernier caliper

c. Bottom micrometer d. Non of the above

3. Implementation of ISO 9000 system results in

a. Improvement of quality of products b. Improvement in productivity

b. An effective quality system d. Non of the above

4. Low temperature metal joining process is called

a. Soldering b. Brazing

c. Arc welding d. Spot welding

5. One micron is equivalent to

a. 0.1 mm b. 0.01 mmc. 0.001 mm d. 0.0001 mm

6. For good solderability, parts are plated witha. Zinc b. Tin

c. Gold d. Silver

7. Stainless steel parts are used on ship borne equipmenta. To improve aesthetic appearance b. To reduce weight

c. To protect from environment d. Non of the above

8. Sub-contracting is resorted to

a. When the shop is over loaded b. When it is economical

c. When there is capacity available with sub-contractord. Non of the above

9. Bakelite is aa. Acrylic b. Thermoplasticc. Paper based phenolic d. Non of the above

10. Chromium is added to steel toa. Increase wear resistance b. Increase the conductivity

c. Produce brittleness d. Improve machinability

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11. The purpose of jigs and fixtures is to

a. Increase production rate b. Increase machining accuracyc. Facilitate inter changeability d. All of the above

12. In press operation the size of the blanked part is equal to the size of

a. Punch b. Diec. Average of Punch and die d. Non of the above

13. Standard time isa. Normal time plus allowance

b. Normal time taken by an average worker

c. Actual time taken for a jobd. Normal time taken by an efficient worker

14. The gears used to transmit rotary motion between two shafts, whose axes areperpendicular are

a. Spur gears b. Helical gears

c. Bevel gears d. Non of the above

15. SPC stands for

a. Statistical product control b. Statistical process control

c. Statistical physical control d. Non of the above

16. Which of the following tool materials can withstand highest cutting speed

a. Carbon steel b. Tool steelc. High speed steel d. Carbide

17. Permissive safe limit of noise level in fabrication shop is

a. 40 db b. < 80 db

c. >80 db d. 120 db

18. Nickel silver is an alloy ofa. Copper and tin b. Lead an tin

c. Copper and Zinc d. Copper and silver

19. Function of HRD is

a. Promote QCC activities b. Promote ISO 9000

c. Train probationary engineers d. Provide training for job enrichment

20. Vendor rating means

a. Measure of overall performance of vendorsb. Determining rate of payment to vendorsc. Ability of vendors for timely delivery

d. Ability of vendors to deliver at short interval

21. Widely used aluminium alloy for pressure die casting are

a. LM6 and LM26 b. NS4

c. HS30 d. Pure aluminium

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22. N. C. paint is

a. Storing paint b. Air drying paintc. Enamel paint d. Non of the above

23. How many parts of size 25mm x 30mm can be sheared/cut of sheet size 1.5M x 1M

a. 1000 b. 1500c. 2000 c. 2500

24. If efficiency is 60% and allowed time is 9 hours then the actual time isa. 5.4 hours b. 15.00 hoursc. 20.00 hours d. 12.8 hours

25. Out of 500 parts inspected 35 parts are rejected for deep cutter marks and 25 partsrejected for material defect. The total rejection percentage is

a. 35% b. 25%

c. 14% d. 12%

26. If the set-up time is 2.5 hours and per piece time is 0.2 hours, the actual time taken at

50% efficiency for making 50 pieces is

a. 25.00 hours b. 12.5 hoursc. 20.00 hours d. 10.00 hours

27. RPM for turning a bar of dia 20mm with a cutting speed of 44mts/min isa. 600 b. 700

c. 2200 d. 2800

28. Area of circle is

a.) r 2 b) r 3

c) r d) Non of the above

29. Pantagraph mechanism is used ina. Profile grinding machine b. Engraving machine

c. Gear hobbing machine d. Jig boring machine

30. Sand blasting is used for

a. Removing paint from base metalb. Removing rust and forming uniform surface

c. Reducing the thickness of the base metal

31. The bore size of a buss is 6.0 +0.015 +0.005 mm and plating is Ag 15. The bore size to be

maintained while machining is

a. 6.0+0.045 +0.035

b. 6.00.015 0.025

c. 6.0+0.015 0.00

32. Hardness of rubber is indicated by

a. Rockwell Hardness b. Brinell Hardness

c. Shore Hardness d. Non of the above

33. Thickness of paint is measured by

a. Mano meter b. Elco meter c. Beta scope d. Sphera meter

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34. Teflon is a trade name for

a. PTFE b. PPO c. PPS d. Non of the above

35. Aluminium with complex profiles can be manufactured by

a. Die casting b. Sand casting

c. Extrusion d. Non of the above

36. MRP II stands fora. Material Resource Planning b. Material Requirement Planningc. Material Release Planning d. Non of the above

37. The characteristic that enables one material to cut another is its relativea. Toughness b. Hardness

c. Resilience d. Ductility

38. The benefits of Indigenisation are

a. Foreign Exchange saving b. Cost reduction

c. Establishing an indigenous source d. All of the above


a. Average b. Dispersion

c. Peakedness d. Non of the above

40. The following gauge is used for checking holes

a. Ring gauge b. Snap gaugec. Dial gauge d. Plug guage

II. Tick (4 ) TRUE or FALSE for any 20 of the following. Each question carriesONE mark. HALF mark will be deducted for wrong answer. In case anycandidate answers more than 20 questions, only the first 20 questions answered

will be considered.

MARKS : 20

1. 30 Tons press weighs 30 Tons TRUE / FALSE

2. One H.P is equal to 746 Watts TRUE / FALSE

3. Pyrometer is used to measure Vacuum TRUE / FALSE

4. Brass is an alloy of Copper and Tin TRUE / FALSE

5. Reaming operation is done to remove heavy burrs

generated in drilling. TRUE / FALSE

6. The whitworth thread has an angle of 55 degrees TRUE / FALSE

7. Trepanning operation can be carried out on a latheor a drilling machine. TRUE / FALSE

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8. The general rule of grinding is a hard wheel for hard work

and a soft wheel for soft work. TRUE / FALSE

9. In aprs shop progressive tools are recommended for

small volume production. TRUE / FALSE

10. Anodising is a process used to provide corrosion

protection to aluminium. TRUE / FALSE

11. Trichloroethylene is used as a solvent in degreasing TRUE / FALSE

12. In quality control SPC stands for Stastical Perfect Control TRUE / FALSE

13. Last 2 digits in a 12 digit part number indicate check digits TRUE / FALSE

14. In cold form tapping extra materials is removed TRUE / FALSE

15. Quality improvement will result in increased costs. TRUE / FALSE

16. Brass wires should never be used as an electrode in EDM wire TRUE / FALSE

17. Stainless steel is an alloy of nickel and cobalt TRUE / FALSE

18. Pressure pads are used in drawing operation to keep the TRUE / FALSE

material flat and eliminate wrinkles.

19. Thermoplastic materials undergo a chemical change by TRUE / FALSE

heating during their final preparation.

20. Diamond is harder than Boron carbide TRUE / FALSE

21. Spiral milling is the operation of milling a helical TRUE / FALSEgroove on a cylindrical piece of work

22. In a gear diametral pitch is equal to the pitch diameter TRUE / FALSEdivided by no. of teeth.

23. In a centreless grinding the work is supported on centers. TRUE / FALSE

24. Production and productivity are one and the same. TRUE / FALSE

25. Broach is a multiple edged cutting tool. TRUE / FALSE

26. Demin water is used in EDM machine mainly to cool the part. TRUE / FALSE

27. Soft jaws are used on center lathe for eccentric turning work. TRUE / FALSE

28. Feeler gauge is used to measure the thickness of gauge. TRUE / FALSE

29. Accurate measurement of angle is possible with a sine bar. TRUE / FALSE

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30. ICRR is Inspection Cum Routine Report. TRUE / FALSE

31. H6 and h7 tolerances are applied for hole and shaft TRUE / FALSE

to achieve interference fit.

32. For salt spray testing, sodium chloride solution spray is used. TRUE / FALSE

33. In a sampling inspection no defective parts can pass TRUE / FALSEthrough to the next operations.

34. Diamond tools must be lightly loaded and not subject to shock. TRUE / FALSE

35. White gate pass is used for non-returnable materials. TRUE / FALSE

36.. Helicoils are used in tapped holes of softer materials. TRUE / FALSE

37. CPM and PERT are one and the same. TRUE / FALSE

38. Preventive maintenance is the same as routine maintenance. TRUE / FALSE

39. Just in Time system leads to increased inventory. TRUE / FALSE

40. STV is used for transfer of items from one stores to another. TRUE / FALSE




MARKS : 20

1. Size of center lathe is specified by distance between centers and ______________

2. Reamer is a cutting tool used to _______________ a hole.

3. The size of the hole needed for tapping M10 X 1.25 threads should be __________

4. The distance through which a screw thread advances axially in one turn is called ___

5. In the Drg. The size for the hole is mentioned as 82.0 (+0.065, +0.028) mm. Thetotal tolerance on the hole is _______________

6. The type of gears used to drive shafts which are parallel to each other are _________

7. The main function of Jigs is to _____________ the tool.

8. The main function of fixtures is to _____________ the job.

9. The primary method of determining whether or not a grinding wheel is cracked or

not is to give it _______________ test.

10. The thread plug gauge is used for ______________________

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11. Steel is an alloy of iron and ________________

12. TORQUE stands for ____________________________________

13. PERT stands for _____________________________________

14. In QCC, Ishikawa diagram is also known as cause and ______________

diagram.

15. Bronze is an alloy of ___________ and ________________

16. HSS contains ______________ % of tungsten.

17. For grinding aluminium _________________ abrasive wheel is used.

18. Dip brazing is used for brazing _______________

19. One inch is equal to _____________ mm.

20. Productivity is the ratio of _____________ and ______________

21. _______________ is used as coolant for machining of aluminium.

22. In heat treatment stress relieving is also known as _________________

23. ________________ alloy steel is used for making punches and dies.

24. Blanking and piercing operation can be simultaneously performed in one _____

tool

25. Metric threads have an included angle of ____________ degrees.

26. In climb milling cutter and job moves in ______________ direction.

27. Neutral solution has ___________ PH value.

28. Aluminium welding is done by _______________________

29. Boiling point of water is ____________ degree Celsius.

30. OARC stands for ______________________________

31. _____________ material is deposited in galvanizing.

32. A generator converts mechanical energy into _________________ energy.

33. In CNC machine ATC stands for ____________________

34. Betascope is used for measuring ____________________

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1994 - Mechanical - Part 2

I. Tick TRUE or FALSE for any Twenty of the following: Marks: 20

1. 60 Tons press weighs 60 tons TRUE/FALSE

2. Quick return mechanism is used in a shaping machine TRUE/FALSE

3. Ishikawa diagram and fishbone diagram are the same TRUE/FALSE

4. In multistart thread pitch and lead are the same TRUE/FALSE

5. Soft jaws chucks are used in center lathes to reduce spindle vibration TRUE/FALSE

6. During grinding harder wheels are used on softer materials TRUE/FALSE

7. Thermocouple is used to measure dew point TRUE/FALSE

8. Tempering is done to remove brittleness caused by hardening TRUE/FALSE

9. Case hardening is a method of hardening chrome steel TRUE/FALSE

10. In heat treatment, induction heating is unsuitable for surface

hardening TRUE/FALSE

11. The rack is a gear of infinite diameter TRUE/FALSE

12. In a gear the module is number of teeth divided by thepitch diameter TRUE/FALSE

13. SPC stands for statistical physical control TRUE/FALSE

14. Broach is a multiple edged cutting tool TRUE/FALSE

15. Helicoils are used in tapped holes of hard materials TRUE/FALSE

16. Stellite is a cutting tool material TRUE/FALSE

17. In press operation, the size of the pierced hole is dependent

on the punch size TRUE/FALSE

18. Trepanning and boring are the same TRUE/FALSE

19. In lathe, the carriage and tailstock are guided on same guideways TRUE/FALSE

20. Tolerances are specified because it is not possible to

manufacture a size exactly TRUE/FALSE

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21. The helical groove in drill is mainly used to admit cutting fluid TRUE/FALSE22. Thermosetting plastics can be remoulded TRUE/FALSE

23. If the threads on a bolt are left hand the threads on the nut

will be right hand with same pitch TRUE/FALSE

24. Multiple threaded screws decrease efficiency TRUE/FALSE

25. Factor of safety is the ratio of yield stress to working stress TRUE/FALSE

26. Bevel gears are used to transmit rotary motion between twoshafts which are parallel TRUE/FALSE

27. One H.P is equal to 846 watts TRUE/FALSE

28. Ultimately, quality improvement will result in increased costs TRUE/FALSE

29. The strength of welded joint when compared to basemetal will be less TRUE/FALSE

30. Austenitic stainless steels are non-magnetic TRUE/FALSE

31. Free machining steels contain selenium TRUE/FALSE

32. ISO 9000 stands for set of Indian standards dealing with

quality system TRUE/FALSE

33. The property of metal by virtue of which the body returns to

its original shape after removal of load is plasticity TRUE/FALSE

34. Y= 4ax is the equation of a parabola TRUE/FALSE

35. Passivation is not done on stainless steel TRUE/FALSE

36. MTBF is the measure of accuracy TRUE/FALSE

37. A ship will sink if it displaces water equal to its own weight TRUE/FALSE

38. Hardness of rubber is indicated by BHN TRUE/FALSE

39. ARC welding is preferred for thin jobs of 1 mm and less TRUE/FALSE

II. Fill in the blanks (any Twenty ) of the following:

Marks: 20

1. Common types of abrasives used in grinding wheels are _____________and ______________

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2. Steel is fundamentally an alloy of _______________ and ______________

3. Plastics are classified into two groups as ___________ and __________

4. CAD/CAM stands for ________________ and ____________

5. LASER stands for ____________________________

6. The primary functions of cutting fluid in machining are _________ and _______

7. Solder is an alloy of ___________________ and ___________

8. In project planning, CPM stands for _______________________

9. In blanking operation the clearance is provided on ____________________

10. Hardness of rubber is indicated by _____________________

11. The bearing used for absorbing axial load is _____________________

12. In 12 digit numbering system the last two digits are used as ________________

13. ________________ Gate pass is used for moving material on returnable basis

14. The least count of a micrometer is _______________ microns

15. In down milling cutter & job move in _______________ direction

16. Expressing dimension 25 +0.00,-0.05 mm is the case of ___________ tolerance

17. Bronze is an alloy __________________ and ________________

18. Acidic solution has __________________ pH value

19. Included angle in unified or American thread is ________________

20. In the conventional engraving machine the mechanism controlling the movement

of cutter is _________________

21. BHN means ________________

22. TORQUE in BE stands for _____________________

23. MRP stands for _____________________

24. H7 and h6 tolerances are applied in hole and shaft respectively to achieve ______ fit

25. ___________ is used for degreasing metal parts

26. Agron gas is used in TIG welding for ________________ purpose

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27. There are ___________________ no. of tools in QCC problem solving28. PTFE stands for ______________________

29. DPDD steel means ______________________

30. Fins are provided on heat sink for _________________

31. PS 252 process standard is mean for __________________________

32. ABS stands for ____________________________

33. HSS contains ______________ Tungsten, __________ % chromium

34. Surface finish is represented on drawing by ________________________

35. Device which holds, locates work piece and guides the cutting tool is called as _____

36. Example of a machine tool is __________________

37. SCR is used by _____________________ Department

38. CMR stands for _______________________

39. SIV stands for ________________________

40. OAMC stands for _______________________________

III. Choose the correct answer and indicate (4 ) for any TWENTY of the following:Marks: 20

1. Aluminium welding is done by

a. Arc welding b. Thermit welding c. TIG welding d. MIG welding

2. The carbon content in mild steel range from

a. 0.02 to 0.03% b. 0.15 to 0.3% c. 1.2 to 1.5% d. None of the above

3. Bakelite is a

a. Acrylate b. Thermoplastic c. Paper based phenolic d. None of t

4. Chromium is added to steel toa. Increase wear resistance b. Increase the conductivity

c. Produce brittleness d. Improve machinability

5. Toughness is the property which enables a material

a. To withstand high temperature b. To withstand shock loading

c. to withstand abrasion d. None of the above

6. The purpose of Jigs and Fixtures is to

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a. Increase production rate b. Increase machining accuracy

c. Facilitate inter changeability d. All of the above7. In press operation the size of the blanked part is depended on the size of

a. Punch b. Die c. Average of punch & die d. Die clearance

8. Standard time isa. Normal time + allowance b. Normal time taken by normal worker

c. Average time taken by average worker d. Actual time taken for a job

9. Volume of a sphere is

a. 4/3 r3 b. 4 r2 h c. 4 r 3 d. 4 d3

10. ABC analysis deals with

a. Flow of material b. Ordering schedule

c. Analysis of process d. Controlling inventory

11. Material used for coating the welding electrode is called

a. Binder b. Plating protective layer

c. Flux d. None of the above

12. Value engineering is the study of

a. Cost of equipment b. Function related to costc. Design to cost d. Production cost control

13. Anodizing isa. Formation of Aluminum oxide by dipping process

b. chromate conversion on aluminum

c. Depositing nickel on steeld. Polishing aluminum parts

14. Work study in concerned witha. Improving present method and finding standard time

b. Motivation of workers

c. Improving production capacity

d. Improving production planning & control

15. PERT stands fora. Program evaluation and review technique

b. Project examination and review technique

c. Project evaluation and reporting technique

d. Project execution and results technique

16. Melting point of solder wire 63/37 is

a. 500o C b. 183o C c. 610o C d. 350o C

17. Temperature of wave soldering bath is

a. 500o C b. 250o C c. 1400o C d. 350o C

18. The working pressure of compressed air in the shop is around

a. 80psi b. 800psi c. 8psi d. None of the above

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19. For sending products to finished goods stores one uses

a. A store requisition b. A store credit note c. ICRR d. SIV20. Copper is

a. Easily spot welded b. Very difficult to be spot welded

c. Identical to any other material to be spot welded

d. Preferred to be welded by spot welding

21. The sum of the angles of a triangle isa. 90o b. 150o c. 175o d. 180o

22. The gears to transmit rotary motion between two shafts. Whose axes are

perpendicular area. Spur gears b. Helical gears c. Bevel gears d. None of the above

23. SPC stands fora. Statistical product control b. Statistical process control

c. Statistical physical control d. None of the above

24. Which of the following tool materials can withstand highest cutting speeda. Carbon steel b. Tool steel c. High speed steel d. Carbide

25. In bending operation the metal takes the shape ofa. Die b. Punch c. Average of both d. Can take any shape

26. Steep tapers can be produced in turning by usinga. Tail stock off set method b. Taper turning attachment

c. Compound rest d. None of the above

27. Included angle of standard drill bit is

a. 60o b. 90o c. 118o d. 125o

28. Counter bored holes diameters can be measured more accurately usinga. Internal micrometer b. Vernier caliper

c. Bottoming micrometer d. None of the above

29. One micron is equivalent to

a. 1/10 mm b. 1/100 mm c. 1/1000 mm d. 1/10000 mm


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