McqMate
These multiple-choice questions (MCQs) are designed to enhance your knowledge and understanding in the following areas: Mechanical Engineering .
| 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 | |
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