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1. |
Cast iron gears are used where |
A. | Stresses on gear are not high |
B. | Size of the gear is large |
C. | High order of accuracy is not desired |
D. | All of the above |
E. | None of the above |
Answer» D. All of the above |
2. |
While machining which of the following improves surface finish? |
A. | Parting off |
B. | Increased cutting speed |
C. | Increased depth of cut |
D. | Formation of built-up edge |
E. | Increased feed rate |
Answer» B. Increased cutting speed |
3. |
Optical flats are made of |
A. | Quartz |
B. | Steel |
C. | Plastic |
D. | Brass |
E. | Bakelite |
Answer» A. Quartz |
4. |
Dry blast cleaning involves |
A. | Blasting the surface with abrasive material |
B. | Blasting the surface with air only |
C. | Blasting the surface with sand |
D. | Blasting the surface with oil |
E. | None of the above |
Answer» D. Blasting the surface with oil |
5. |
A right hand tool on lathe machine will cut efficiently while cutting |
A. | In either direction |
B. | Grooved jobs |
C. | From right to left |
D. | Taper |
E. | From left to right |
Answer» C. From right to left |
6. |
Ceramic tool inserts are fixed to the tool holder by |
A. | Casting |
B. | Soldering |
C. | Resistance welding |
D. | Brazing |
E. | adhesives |
Answer» D. Brazing |
7. |
The pouring of molten metal during casting should be stopped when |
A. | Molten metal rises in the riser |
B. | Molten metal is exhausted |
C. | Molten is full |
D. | Molten metal is seen through the riser |
E. | Molten metal flows out of the riser |
Answer» A. Molten metal rises in the riser |
8. |
In shearing operation on a power press, total cutting force depends on |
A. | sharpness of cutting edge |
B. | clearance between die and punch |
C. | angle of shear on die and punch |
D. | All of the above |
E. | Parting off |
Answer» D. All of the above |
9. |
Which strength is the major consideration, which of the following process should be favoured |
A. | Forging |
B. | Sand casting |
C. | Die casting |
D. | Hot rolling |
E. | Any of the above |
Answer» A. Forging |
10. |
While cutting double start threads of pitch 2 mm on a lathe, the cutting tool will advance by |
B. | 4 mm/revolution |
C. | 2 mm/revolution |
D. | 1 mm/revolution |
E. | 8 mm/revolution |
Answer» B. 4 mm/revolution |
11. |
In ultrasonic welding the frequency range is generally |
A. | 80,000 - 800,000 cps |
B. | 100 - 4000 cps |
C. | 20,000 - 80,000 cps |
D. | 800,000 - 5000,000 cps |
E. | 4000 - 20,000 cps |
Answer» E. 4000 - 20,000 cps |
12. |
In which of the following process the electrode is not consumed? |
A. | TIG welding |
B. | Gas welding |
C. | DC arc welding |
D. | Plasma welding |
E. | Laser welding |
Answer» A. TIG welding |
13. |
Which of the following is a clearance fit? |
A. | Press fit |
B. | Force fit |
C. | Push fit |
D. | Sliding fit |
E. | Driving fit |
Answer» D. Sliding fit |
14. |
Which hardening process is free from scale formation? |
A. | Flame hardening |
B. | Nitriding |
C. | Cyaniding |
D. | Induction hardening |
E. | Parting off |
Answer» D. Induction hardening |
15. |
Miter gears are |
A. | Gears of different modules |
B. | Spur gears of equal diameter and pitch |
C. | Helical gears of same module |
D. | Right angled bevel gears having the same number of teeth |
E. | None of above |
Answer» D. Right angled bevel gears having the same number of teeth |
16. |
In gas welding using oxygen and acetylene cylinders the pressure of gas is more in |
B. | Aetylene cylinders |
C. | Equal in both cylinders |
D. | Oxygen cylinder |
E. | 400 - 440 V |
Answer» D. Oxygen cylinder |
17. |
Some substances generate voltage when they are subjected to mechanical forces or stresses along specific planes. Such subtances are known as |
A. | Photo-electric |
B. | Megneto-electric |
C. | Thermo-electric |
D. | Piezo-electric |
E. | Radio-active |
Answer» D. Piezo-electric |
18. |
Ball bearing races are |
A. | Lapped |
B. | Ground |
C. | Nickel plated |
D. | Buffed |
E. | Turned |
Answer» A. Lapped |
19. |
In centreless grinding the regulating wheel is inclined at an angle |
A. | 12 - 24? |
B. | 9-15? |
C. | 1 - 8? |
D. | 15 - 18? |
E. | 25 - 35? |
Answer» C. 1 - 8? |
20. |
Which of the following operation is not involved in heat treatment of steels |
A. | Tumbling |
B. | Cyniding |
C. | Annealing |
D. | Normalizing |
E. | Strain drawing |
Answer» A. Tumbling |
21. |
The surface roughness on a drawing is represented by |
A. | Circle |
B. | Triangle |
C. | Zig-zag lines |
D. | Square |
E. | Curve |
Answer» B. Triangle |
22. |
A rack is a gear of |
A. | Infinite pitch |
B. | Infinite number of teeth |
C. | Infinite diameter |
D. | Infinite clearance |
E. | Infinite module |
Answer» C. Infinite diameter |
23. |
The shears used for making circular cuts are known as |
A. | Curved shears |
B. | Straight shears |
C. | Any of (A) or (B) |
E. | Parting off |
Answer» A. Curved shears |
24. |
For the measurement of temperature the transduction method could be |
A. | Capacitive |
B. | Inductive |
C. | Electron tube |
D. | Piezo-electric |
E. | Resistance |
Answer» E. Resistance |
25. |
Cores are used |
A. | To make castings sound |
B. | To strengthen mould |
C. | To get cavity or recess in a casting |
D. | To get smooth surface on castings |
E. | In symmetrical casting only |
Answer» C. To get cavity or recess in a casting |
26. |
Which of the following process will be preferred for joining thin foils? |
A. | Thermit welding |
B. | Gas welding |
C. | MIG welding |
D. | DC arc welding |
E. | Plasma arc welding |
Answer» E. Plasma arc welding |
27. |
Resistance wire strain gauge works on the principle |
A. | That conductivity is directly proportional to load on member |
B. | Due to elongation length increases and diameter reduces, thereby resistance changes |
C. | That resistance chanes in proportion to strain on material |
D. | That resistance of wire changes with load |
E. | That the resistance of a wire is directly proportional to diameter and inversely proportional to length |
Answer» B. Due to elongation length increases and diameter reduces, thereby resistance changes |
28. |
If the correctness of profile of a thread is to be checked which instrument would you choose? |
A. | Screw pitch gauge |
B. | Telescopic gauge |
C. | Optical projector |
D. | Sine bar |
E. | Bench micrometer |
Answer» C. Optical projector |
29. |
Which is the first element of the tool signature? |
A. | Side relief angle |
B. | Side rake angle |
C. | Parting off |
D. | Back rake angle |
E. | Nose radius |
Answer» D. Back rake angle |
30. |
The surface finish obtainable in abrasive jet machining is of the order of |
A. | 0.5 to 1.2 |
B. | 20 to 50 |
C. | 12 to 20 |
D. | 2 to 5 |
E. | 50 to 100 |
Answer» A. 0.5 to 1.2 |
31. |
Beak horn stake (Bick Iron) is used to |
B. | Make circular folded seams |
C. | Parting off |
D. | Bend sheet metal into cylindrical/conical shapes |
E. | Make straight and shorp bends |
Answer» D. Bend sheet metal into cylindrical/conical shapes |
32. |
Paper cutting knives steel contains carbon percentage |
A. | 0.2 to 0.4% |
B. | Below 0.2% |
C. | 1.3 to 1.5% |
D. | 0.8 to 1% |
E. | 0.4 to 0.7% |
Answer» C. 1.3 to 1.5% |
33. |
In broaching operation the accuracy that can be obtained is of the order of |
A. | 100 micron |
B. | 1 micron |
C. | 0.1 micron |
D. | 1000 micron |
E. | 10 micron |
Answer» B. 1 micron |
34. |
Steam condenser tubes are generally made of |
A. | Brass |
B. | Bronze |
C. | Bell metal |
D. | Admiralty alloy |
E. | Babbit metal |
Answer» D. Admiralty alloy |
35. |
The decibel is |
A. | Unit of noise level |
B. | A logarithmic ratio between a measured quantity and a reference quantity |
C. | Quantity of noise per unit area |
D. | A logarithmic ratio between a measured quantity and 100 |
E. | None of the above |
Answer» B. A logarithmic ratio between a measured quantity and a reference quantity |
36. |
In a cupola the raw material is |
A. | Steel ingots |
B. | Pig iron and iron scrap |
C. | Steel billets |
D. | Iron ore |
E. | Cast steel |
Answer» B. Pig iron and iron scrap |
37. |
Principal materials used in soldering are |
A. | Tin and lead |
B. | Copper and tin |
C. | Zinc and copper |
D. | Copper and lead |
E. | None of the above |
Answer» A. Tin and lead |
38. |
A 30 mm diameter is being machined when the chuck is revolving at 100 rpm. The cutting speed is nearly |
A. | 50 metres per minute |
B. | 40 metres per minute |
C. | 30 metres per minute |
D. | 60 metres per minute |
E. | 70 metres per minute |
Answer» D. 60 metres per minute |
39. |
Out of the following materials which one is expected to have highest melting point? |
A. | Lead |
B. | Tungsten |
C. | Palladium |
D. | Silver |
E. | Gold |
Answer» B. Tungsten |
40. |
Which of the following is not used for orthogonal cutting? |
A. | Drills |
B. | Slotting cutter |
C. | Parting off |
D. | Sawing |
E. | Broaching |
Answer» A. Drills |
41. |
Vacuum is the medium of machining in cases of |
A. | Ultrasonic machining |
B. | Laser beam machining |
C. | Plasma arc machining |
D. | Electro discharge machining |
E. | Electron beam machining |
Answer» E. Electron beam machining |
42. |
A job made by forging is |
B. | Parting off |
C. | Weaker than a job made by casting or machining |
E. | Stronger than a job made by casting or machining |
Answer» E. Stronger than a job made by casting or machining |
43. |
In metal cutting operations shear angle is defined as the angle |
A. | Made by the plane of shear with the direction of tool travel |
B. | Made by the shear plane with the tool axis |
C. | Made by shear plane with the central plane of work piece |
D. | None of the above |
E. | Wood |
Answer» A. Made by the plane of shear with the direction of tool travel |
44. |
In which of the following machining process thermoelectric energy is used for machining operations? |
A. | Ion beam machining |
B. | Electro discharge maching |
C. | Laser beam machining |
D. | Electro beam machining |
E. | All of the above |
Answer» E. All of the above |
45. |
A shim is |
A. | A surface on which bearings are fitted |
B. | A treatment given to a surface to prevent rusting |
C. | A kind of shrink fit |
D. | A thin piece of sheet metal used between mating parts to provide the proper distance |
E. | A dull corner on a shaft |
Answer» D. A thin piece of sheet metal used between mating parts to provide the proper distance |
46. |
For the measurement of pressure of liquids at high temperature using pressure gauge |
A. | Gauge is heated to the temperature to be measured |
B. | Necessary thermodynamic calculations are made |
C. | Necessary correction factory is applied |
D. | A siphon filled with liquid is used to protect the Bourdon tube |
E. | Pressure gauge is never used in such cases |
Answer» D. A siphon filled with liquid is used to protect the Bourdon tube |
47. |
Work holding faces of a bench vice are |
B. | Grooved |
C. | Parting off |
D. | Serrated |
E. | Smooth |
Answer» D. Serrated |
48. |
Balometers are used for the measurement of |
A. | Temperature input |
B. | Thermal radiation |
C. | Electrical input |
D. | Optical input |
E. | Pneumatic input |
Answer» B. Thermal radiation |
49. |
A steady rest is used for |
A. | Long jobs |
B. | Irregular jobs |
C. | Large diameter jobs |
D. | Threading jobs |
E. | All of the above |
Answer» A. Long jobs |
50. |
If the rake angle on a HSS lathe tool is 25 degrees the materials being machined is |
A. | Cast iron |
B. | Aluminium |
C. | Mild steel |
D. | Carbon steel |
E. | High speed steel |
Answer» B. Aluminium |
51. |
Which of the following is an inert gas? |
A. | Carbondioxide |
B. | Carbon monoxide |
C. | Nitrogen |
D. | Argon |
E. | All of the above |
Answer» D. Argon |
52. |
In lathe machine the chasing dial is used during |
A. | Taper turning |
B. | Drilling |
C. | Parting off |
D. | Thread cutting |
E. | Knurling |
Answer» D. Thread cutting |
53. |
The depth of cut depends on the |
A. | curring speed |
B. | rigidity of machine tool |
C. | tool material |
D. | all of the above |
E. | Parting off |
Answer» D. all of the above |
54. |
Which of the following is a gear finishing operation? |
A. | Gear burnishing |
B. | Phosphate coating |
C. | Gear lapping |
D. | All of the above |
E. | Parting off |
Answer» D. All of the above |
55. |
While cutting with a hacksaw, the number of teeth contacting the job should be |
A. | More than one |
B. | Only one |
C. | Any of (A) or (B) |
E. | Parting off |
Answer» A. More than one |
56. |
Which one of the following is not included in the combinations set? |
A. | A centre head |
B. | A protector |
C. | Square |
D. | A rule |
E. | Short rule |
Answer» E. Short rule |
57. |
Choose the incorrect statement. The mechanism of tool wear is |
A. | oxidation |
B. | reduction |
C. | diffusion |
D. | None of the above |
E. | Parting off |
Answer» B. reduction |
58. |
Discontinuous type chips are generally produced in |
A. | Alloy steels |
B. | Cast iron |
C. | Aluminium |
D. | Duralumin |
E. | Mild steel |
Answer» B. Cast iron |
59. |
Yellow colour on a pattern indicates |
A. | Seat for loose core prints |
B. | Surface to be left unmachined |
C. | Surface to be machined |
D. | Fillets |
E. | Core prints |
Answer» C. Surface to be machined |
60. |
Taper shank on drills is provided for |
A. | Use on tapered surfaces |
B. | Eye |
C. | Quick intersection in spindle |
D. | None of these |
E. | Drilling taper holes |
Answer» C. Quick intersection in spindle |
61. |
Coated tools are good at |
A. | reducing machining cost |
B. | increasing surface finish on scoled surfaces |
C. | reducing diffusion wear |
D. | None of the above |
E. | Carmetting |
Answer» C. reducing diffusion wear |
62. |
Noise level in case of an aircraft is |
A. | In the range of 80 - 110 db |
B. | Always more than 100 db |
C. | Generally less than 100 db |
D. | In the range of 60 - 80 db |
E. | Generally more than 100 db |
Answer» B. Always more than 100 db |
63. |
A process of zinc diffusion is known as |
A. | Brazing |
B. | Anodising |
C. | Sintering |
D. | Sherardizing |
E. | Metallizing |
Answer» D. Sherardizing |
64. |
Which of the following can be used to produce laser? |
A. | Diamond |
B. | Gold |
C. | Platinum |
D. | Emerald |
E. | Ruby |
Answer» E. Ruby |
65. |
The accuracy of a limit gauge can be checked by |
A. | Vernier caliper |
B. | Micrometer |
C. | Slip gauge |
D. | Sine bar |
E. | Any of the above |
Answer» C. Slip gauge |
66. |
The tool used for grooving a seam is called |
A. | Parting off |
B. | Breasing stake |
C. | Rivet set |
D. | Groover |
Answer» D. Groover |
67. |
The tool may fail suddenly because of |
A. | crater wear |
B. | both crater and flank wear |
C. | spalling |
D. | Parting off |
E. | flank wear |
Answer» C. spalling |
68. |
Knurling is an operation |
A. | Of cutting smooth collars |
B. | Of under cutting |
C. | Done prior to screw cutting |
D. | Of generally roughing the surface for hand grip |
E. | Done without use of coolant |
Answer» D. Of generally roughing the surface for hand grip |
69. |
Which of the following material has maximum shrinkage during solidification? |
A. | Parting off |
B. | Copper |
C. | Aluminium |
D. | Steel |
E. | Cast iron |
Answer» C. Aluminium |
70. |
Which of the following process is preferred for cutting and welding of nonferrous metals? |
A. | Submerged arc welding |
B. | Inert gas arc welding |
C. | MIG welding |
D. | DC arc welding |
E. | None of the above |
Answer» B. Inert gas arc welding |
71. |
The riser in a mould should be located in such a way so that |
A. | it touches all parts of the casting |
B. | it is first to receive the molten metal |
C. | Parting off |
D. | it is last to solidify |
E. | it is first to solidify |
Answer» D. it is last to solidify |
72. |
In a drilling operation |
A. | Torque is equal to the axial force |
B. | Torque is more than the axial force |
C. | None of above |
D. | Torque is half the axial force |
E. | Torque is less than the axial force |
Answer» D. Torque is half the axial force |
73. |
Poor fusion in a welded joint may be due to |
A. | Lack of flux |
B. | Improper current |
C. | High welding speed |
D. | Dirty metal surface |
E. | None of the above |
Answer» B. Improper current |
74. |
Merchant's machinability constant is |
A. | 2 ? - ? - ? |
B. | 500 tons to 1000 tons |
C. | 2 ? - ? + ? |
D. | ? + ? - ? |
E. | 2 ? + ? - ? |
Answer» E. 2 ? + ? - ? |
75. |
Type of gears used in electric switch gear is |
A. | Bevel gears |
B. | Herringbone gears |
C. | Gears are not used in switch gear |
D. | Helical gears |
E. | Spiral gears |
Answer» C. Gears are not used in switch gear |
76. |
The power consumption in laser beam machining is of the order of |
A. | 2 kW/m3/min |
B. | 270 kW/m3/min |
C. | 2700 kW/m3/min |
D. | 5000 kW/m3/min |
E. | 27 kW/m3/min |
Answer» C. 2700 kW/m3/min |
77. |
A foil is |
A. | Same as sheet |
B. | Same as strip |
C. | A cold rolled sheet |
D. | A thin strip with maximum width 300 mm and a maximum thickness of 1.5 mm |
E. | None of the above |
Answer» D. A thin strip with maximum width 300 mm and a maximum thickness of 1.5 mm |
78. |
Vertical centrifugal castings as compared to horizontal centrifugal castings are spun at |
A. | Lower speeds |
B. | Higher speeds |
C. | Same speed |
D. | Varying speeds |
E. | None of the above |
Answer» B. Higher speeds |
79. |
For a peripheral speed of 35 m/s, a grinding wheel of 800 mm diameter must rotate at |
A. | 1600 rpm |
B. | 835 rpm |
C. | 435 rpm |
D. | 60 rpm |
E. | 85 rpm |
Answer» B. 835 rpm |
80. |
In a lathe gear box if first four consecutive speed are 19, 30, 47, 74 rpm, the next speed would be |
A. | 116 rpm |
B. | 104 rpm |
C. | 111 rpm |
D. | 93 rpm |
E. | 101 rpm |
Answer» A. 116 rpm |
81. |
EDM is generally preferred for |
A. | Hard materials |
B. | Cast materials |
C. | Non-metallic compounds |
D. | Non-ferrous materials |
E. | Polymers |
Answer» A. Hard materials |
82. |
Grey iron is usually welded by |
A. | Resistance welding |
B. | Arc welding |
C. | TIG welding |
D. | Gas welding |
E. | MIG welding |
Answer» D. Gas welding |
83. |
The machine allowance on castings does depend on |
A. | Size of the casting |
B. | Shape of the casting |
C. | Temperature of molten material |
D. | All of the above |
E. | None of the above |
Answer» C. Temperature of molten material |
84. |
A strip is |
A. | A section other than rectangular |
B. | A sheet less than 6 mm in thickness and 300 mm in width |
C. | A cold rolled sheet |
D. | Same as sheet |
E. | Same as plate |
Answer» B. A sheet less than 6 mm in thickness and 300 mm in width |
85. |
On a die accurate holes are to be drilled. Which machine would you prefer for this operation? |
A. | Parting off |
B. | Radial drilling machine |
C. | Portable drilling machine |
D. | Jig boring machine |
E. | Multi-pindle drilling machine |
Answer» D. Jig boring machine |
86. |
Which one of the following is used for thermocouple junctions? |
A. | Muntz metal |
B. | Elinvar |
C. | Manganin |
D. | Duralumin |
E. | Nichrome |
Answer» C. Manganin |
87. |
The property due to which sand grains stick together is known as |
A. | adhesiveness |
B. | Parting off |
C. | permeability |
D. | cohesiveness |
E. | plasticity |
Answer» D. cohesiveness |
88. |
In case of very hard surfaces the Brinell Hardness test method fails to give reliable results because |
A. | Ball does not force into the metal |
B. | Ball deforms on very hard surfaces |
C. | Ball slips along the surface |
D. | It is generally not desired to use this method in such cases |
E. | None of the above |
Answer» B. Ball deforms on very hard surfaces |
89. |
Shot blasting is |
A. | Process of cleaning moulding sand |
B. | Process of cleaning spherical objects only |
C. | Process of supplying blast of hot air to cupola |
D. | Process of cleaning castings |
E. | Process of cleaning core sand |
Answer» D. Process of cleaning castings |
90. |
Which of the following source for laser beam can give the highest power density (W/mm2)? |
A. | Laser continuous |
B. | Plasma arc |
C. | Laser pulsed |
D. | All have the same power density |
E. | Electron beam |
Answer» C. Laser pulsed |
91. |
A flycutter is used on |
A. | Planer |
B. | Slotter |
C. | Shaper |
D. | Milling machine |
E. | Lathe |
Answer» D. Milling machine |
92. |
High rate of oscillation of tools in ultrasonic machining is produced by |
A. | Pneumatic generator |
B. | Explosives |
C. | D.C. motor |
D. | Oscillator |
E. | A.C. motor |
Answer» D. Oscillator |
93. |
Slip gauges are made of |
A. | Aluminium |
B. | Copper |
C. | Alloy steel |
D. | Stainless steel |
E. | Cast iron |
Answer» C. Alloy steel |
94. |
A third flask sometimes used between cope and drag is called |
A. | Core |
B. | Middle |
C. | Check |
D. | Riddle |
E. | Fillet |
Answer» C. Check |
95. |
Which of the following is a ferrous cutting tool? |
A. | Diamond |
B. | Cast carbides |
C. | HSS |
D. | Ceramics |
E. | Parting off |
Answer» C. HSS |
96. |
Gear cutter No. 1 for cutting gears on milling machine is used for |
A. | 17 to 20 teeth |
B. | 135 to 150 teeth |
C. | 12 to 13 teeth |
D. | Racks only |
E. | 55 to 120 teeth |
Answer» B. 135 to 150 teeth |
97. |
DIN specifications have been developed in |
A. | Austria |
B. | Russia |
C. | America |
D. | Germany |
E. | England |
Answer» D. Germany |
98. |
A steady rest is used |
A. | During taper turning |
B. | During threading operation |
C. | For supporting the bed |
D. | While cutting heavy and log jobs |
E. | During finishing operation |
Answer» D. While cutting heavy and log jobs |
99. |
During electron beam welding the vacuum is of the order of |
A. | 10-5 torr |
B. | 1 torr |
C. | 10-3 torr |
D. | 10-4 torr |
E. | 10-2 torr |
Answer» A. 10-5 torr |
100. |
Which one does not fit with rest in the following? |
A. | Jaw chuck |
B. | Drill |
C. | Tapping |
D. | Reamer |
E. | Pipe cutter |
Answer» E. Pipe cutter |
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