MCQOPTIONS
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MCQOPTIONS
This section includes 657 Mcqs, each offering curated multiple-choice questions to sharpen your Testing Subject knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The minimum size of a bloom is |
| A. | 5 cm x 5 cm |
| B. | 10 cm x 10 cm |
| C. | 15 cm x 15 cm |
| D. | 20 cm x 20 cm |
| Answer» D. 20 cm x 20 cm | |
| 2. |
The operation of cutting a number of holes evenly spaced in a regular pattern on a sheet of metal is. called perforating. |
| A. | Agree |
| B. | Disagree |
| Answer» B. Disagree | |
| 3. |
The welding set up is said to have straight polarity, when |
| A. | work is connected to the positive terminal and the electrode holder to the negative terminal |
| B. | work is connected to the negative terminal and the electrode holder to the positive terminal |
| C. | work is connected to the positive terminal and the electrode holder is earthed |
| D. | work is connected to the negative terminal and the electrode holder is earthed |
| Answer» B. work is connected to the negative terminal and the electrode holder to the positive terminal | |
| 4. |
The binder commonly used in making oil sand, is |
| A. | clay-type binder |
| B. | organic-type binder |
| C. | inorganic-type binder |
| D. | any one of these |
| Answer» C. inorganic-type binder | |
| 5. |
During hot working of metals |
| A. | porosity of the metal is largely eliminated |
| B. | grain structure of the metal is refined |
| C. | mechanical properties are improved due to refinement of grains |
| D. | all of the above |
| Answer» E. | |
| 6. |
The metal is subjected to mechanical working for |
| A. | refining grain size |
| B. | reducing original block into desired shape |
| C. | controlling the direction of flow lines |
| D. | all of these |
| Answer» E. | |
| 7. |
To prevent the body of the blade from jamming in the saw cut, the teeth of blade are |
| A. | strengthened |
| B. | sharpened |
| C. | set |
| D. | all of these |
| Answer» D. all of these | |
| 8. |
A ring gauge is used to |
| A. | check the diameter of shafts or studs |
| B. | test the accuracy of holes |
| C. | check the clearance between two mating surfaces |
| D. | all of the above |
| Answer» B. test the accuracy of holes | |
| 9. |
A casting defect which occurs near the ingates as rough lumps on the surface of a casting is known as |
| A. | shift |
| B. | sand wash |
| C. | swell |
| D. | scab |
| Answer» C. swell | |
| 10. |
According to Indian standards, the total number of tolerance grades are |
| A. | 8 |
| B. | 12 |
| C. | 18 |
| D. | 20 |
| Answer» D. 20 | |
| 11. |
In tungsten-inert gas arc welding, a __________ electrode is used. |
| A. | consumable |
| B. | non-consumable |
| Answer» C. | |
| 12. |
The most preferred process for casting gas turbine blades is |
| A. | die casting |
| B. | shell moulding |
| C. | investment moulding |
| D. | sand casting |
| Answer» C. investment moulding | |
| 13. |
The electron beam welding can be carried out in |
| A. | open air |
| B. | a shielded gas environment |
| C. | vacuum |
| D. | a pressurised inert gas chamber |
| Answer» D. a pressurised inert gas chamber | |
| 14. |
A casting defect which results in general enlargement of a casting is known as |
| A. | shift |
| B. | sand wash |
| C. | swell |
| D. | scab |
| Answer» D. scab | |
| 15. |
Rotary swaging |
| A. | is extensively used for making bolts and rivets |
| B. | is used for reducing the diameters of round bars and tubes by rotating dies which open and close rapidly on the work |
| C. | is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface |
| D. | consists of pressing the metal inside a chamber to force it out by high pressure through an orifice which is shaped to provide the desired form of the finished part |
| Answer» C. is used to improve fatigue resistance of the metal by setting up compressive stresses in its surface | |
| 16. |
Thermit welding is often used in |
| A. | replacing broken gear teeth |
| B. | repairing broken shears |
| C. | joining rails, truck frames and locomotive frames etc. |
| D. | all of the above |
| Answer» E. | |
| 17. |
The directional solidification in casting can be improved by using |
| A. | chills and chaplets |
| B. | chills and padding |
| C. | chaplets and padding |
| D. | chills, chaplets and padding |
| Answer» C. chaplets and padding | |
| 18. |
When two metal pieces of different thicknesses are to be welded by projection welding, then the projections should be made on __________ metal piece. |
| A. | thinner |
| B. | thicker |
| Answer» C. | |
| 19. |
Spot welding is used for welding |
| A. | lap joints in plates having 0.025 mm to 1.25 mm thickness |
| B. | lap joints in plates having thickness above 3 mm |
| C. | butt joints in plates having 0.025 mm to 1.25 mm thickness |
| D. | butt joints in plates having thickness above 3 mm |
| Answer» B. lap joints in plates having thickness above 3 mm | |
| 20. |
In fore-hand welding, the angle between the welding rod and the work is kept as |
| A. | 30 -40 |
| B. | 40 -50 |
| C. | 50 -60 |
| D. | 60 -70 |
| Answer» B. 40 -50 | |
| 21. |
Gagger is used for cleaning the moulding sand. |
| A. | Correct |
| B. | Incorrect |
| Answer» C. | |
| 22. |
Aluminium is the best material for making patterns because it is |
| A. | light in weight |
| B. | easy to work |
| C. | corrosion resistant |
| D. | all of these |
| Answer» E. | |
| 23. |
The valve tappet clearance is measured by |
| A. | screw pitch gauge |
| B. | engineering scale |
| C. | feeler gauge |
| D. | vernier caliper |
| Answer» D. vernier caliper | |
| 24. |
An over-inflated tyre will wear the tread most near the |
| A. | edges |
| B. | corners |
| C. | centre |
| D. | none of these |
| Answer» D. none of these | |
| 25. |
Cushioning springs in clutch plate reduces |
| A. | vehicle speed |
| B. | torsional vibrations |
| C. | jerky starts |
| D. | none of these |
| Answer» D. none of these | |
| 26. |
The negative terminal post on the top of a battery is |
| A. | smaller than the positive terminal post |
| B. | larger than the positive terminal post |
| C. | of the same size as the positive terminal post |
| D. | none of these |
| Answer» B. larger than the positive terminal post | |
| 27. |
In a single dry plate clutch, torsional vibrations are absorbed by |
| A. | coil springs known as torsional springs |
| B. | cushion springs |
| C. | central hub |
| D. | clutch pedal |
| Answer» B. cushion springs | |
| 28. |
Odometer is an instrument used for measurement of |
| A. | power |
| B. | fuel consumption |
| C. | engine r.p.m. |
| D. | distance |
| Answer» E. | |
| 29. |
Which of the following oil is more viscous ? |
| A. | SAE 30 |
| B. | SAE 40 |
| C. | SAE 70 |
| D. | SAE 80 |
| Answer» E. | |
| 30. |
Two speed reverse gear arrangement is generally provided in case of |
| A. | passenger cars |
| B. | metadors |
| C. | tractors |
| D. | trucks |
| Answer» D. trucks | |
| 31. |
The function of a governor in automobiles is to |
| A. | limit the power |
| B. | limit the vehicle speed |
| C. | maintain constant engine speed |
| D. | maximise the fuel economy |
| Answer» D. maximise the fuel economy | |
| 32. |
The basic purpose of tyres is to |
| A. | grip the road and provide good traction |
| B. | substitute for springs |
| C. | act as brake |
| D. | none of these |
| Answer» B. substitute for springs | |
| 33. |
The specific gravity of petrol is about |
| A. | 0.75 |
| B. | 0.85 |
| C. | 0.95 |
| D. | 1.25 |
| Answer» B. 0.85 | |
| 34. |
The clutch is located between the transmission and the |
| A. | engine |
| B. | rear axle |
| C. | propeller shaft |
| D. | differential |
| Answer» B. rear axle | |
| 35. |
Which one of the following statement correctly describe the construction of a bevel-gear type differential? |
| A. | The drive shafts are splined to the differential carrier. |
| B. | The left side gear and the differential carrier rotate in constant unison. |
| C. | The differential carrier houses differential pinion gears and side gears, each pinion gear meshes with a different side gear. |
| D. | The differential carrier houses differential pinion gears and side gears |
| Answer» E. | |
| 36. |
The brake warning light warns the driver of |
| A. | water in the master cylinder |
| B. | air in the hydraulic system |
| C. | failure of the primary or secondary circuit of hydraulic system |
| D. | power-brake failure |
| Answer» D. power-brake failure | |
| 37. |
Vulcanizing means |
| A. | heating rubber under pressure |
| B. | spraying with special paint |
| C. | melting rubber while stirring it |
| D. | none of these |
| Answer» B. spraying with special paint | |
| 38. |
The engine torque increases with the increase in engine speed up to a certain point after which it starts to fall down. |
| A. | Correct |
| B. | Incorrect |
| Answer» B. Incorrect | |
| 39. |
For obtaining a cup of diameter 25 mm and height 15 mm by drawing, the size of the round blank should be approximately |
| A. | 42 mm |
| B. | 44 mm |
| C. | 46 mm |
| D. | 48 mm |
| Answer» D. 48 mm | |
| 40. |
The specific gravity of acid in a fully charged battery is generally |
| A. | 1.00 |
| B. | 1.28 |
| C. | 1.82 |
| D. | 2.81 |
| Answer» C. 1.82 | |
| 41. |
The brake pedal during ABS operation |
| A. | is pushed upward forcefully |
| B. | pedal stroke becomes longer |
| C. | transmits slight kickback to the driver's foot |
| D. | all of the above |
| Answer» D. all of the above | |
| 42. |
Damper in an automobile is used to |
| A. | absorb the energy |
| B. | dissipate the energy |
| C. | release the energy |
| D. | increase the energy |
| Answer» C. release the energy | |
| 43. |
The most effective method of controlling S.I. engine exhaust emission is by |
| A. | recirculating exhaust |
| B. | using catalytic converter |
| C. | using some additives in the fuel |
| D. | none of these |
| Answer» C. using some additives in the fuel | |
| 44. |
Valve overlap is the number of degrees of camshaft rotation during which |
| A. | both valves are closed |
| B. | both valves are open |
| C. | both 'a' and 'b' |
| D. | none of these |
| Answer» C. both 'a' and 'b' | |
| 45. |
The component that is responsible for converting the rotation of the steering wheel into lateral motion is the |
| A. | steering wheel |
| B. | steering shaft |
| C. | steering gearbox |
| D. | tie rod |
| Answer» D. tie rod | |
| 46. |
The connecting rod connects the piston and the |
| A. | cylinder head |
| B. | cylinder block |
| C. | camshaft |
| D. | crankshaft |
| Answer» E. | |
| 47. |
The main cause for the change in engine oil viscosity is |
| A. | humidity |
| B. | temperature |
| C. | vibration |
| D. | contamination |
| Answer» C. vibration | |
| 48. |
The forced-fed lubrication system means that the oil is delivered to the engine by |
| A. | gravity |
| B. | the pressure created by the oil pump |
| C. | splashing action of the crankshaft |
| D. | none of these |
| Answer» C. splashing action of the crankshaft | |
| 49. |
The problems caused by the wheel imbalance are |
| A. | hard steering and hard ride |
| B. | poor acceleration and hard steering |
| C. | steering wheel vibrations and uneven tyre wear |
| D. | poor acceleration and reduced fuel efficiency |
| Answer» D. poor acceleration and reduced fuel efficiency | |
| 50. |
The connecting rod lower end is connected to the relevant __________ of crankshaft. |
| A. | big end |
| B. | crank arm |
| C. | journal |
| D. | small end |
| Answer» D. small end | |