1000+ Automobile Engineering Multiple Choice Question Answer [Solved]

1. The tyre rotation is generally done at
A. 1000 km
B. 4000 km
C. 6000 km
D. 10000 km
Answer : D

2. The basic purpose of providing caster angle on wheels is to
A. Prevent uneven tyre wear
B. Maintain directional control
C. Bring the road contact of the tyre under the point of load
D. Compensate for wear in the steering linkage
Answer : B

3. In a four speed four stroke Diesel engine, the intake valve
A. Opens at T.D.C. and closes at B.D.C.
B. Opens at 20° before T.D.C. and closes at 35° after B.D.C.
C. Opens at 10° after T.D.C. and closes at 20° before B.D.C.
D. None of the above
Answer : B

4. The function of a radiator fan in the cooling system is that
A. It blows air through the radiator when necessary
B. It is turned by wind force as the vehicle moves forward, and its rotation drives the water pump
C. It cools the engine by blowing air onto the cylinder block
D. It draws heat out of the engine compartment
Answer : A

5. The two rows of cylinders in a 'V' type engine are generally arranged at
A. 45°
B. 60°
C. 90°
D. 130°
Answer : B

6. Which of the following bulb in a car will have the least wattage?
A. Head light bulb
B. Stop light bulb
C. Parking light bulb
D. Ignition warning bulb
Answer : D

7. The main purpose of an engine's air cleaner is that it
A. Controls the engine's air intake volume
B. Reduces the engine's air intake noise
C. Prevents rain water from entering the engine
D. Prevents dust and other foreign matter from entering the engine
Answer : D

8. The basic characteristics of a brake fluid is
A. A high boiling point
B. Low viscosity
C. Compatibility with rubber and metal parts
D. All of these
Answer : D

9. Petrol that detonates easily is called
A. High octane petrol
B. Low octane petrol
C. Unleaded petrol
D. Blended fuel
Answer : B

10. The vehicle ride will be comfortable if
A. Unsprung mass is kept minimum
B. Sprang mass is kept minimum
C. Vehicle mass is kept minimum
D. All of these
Answer : A

11. The camshaft of a four stroke Diesel engine running at 1000 rpm will run at
A. 500 rpm
B. 1000 rpm
C. 2000 rpm
D. 4000 rpm
Answer : A

12. In a petrol engine, the high voltage for spark plug is in the order of
A. 1000 volts
B. 2000 volts
C. 11 kilovolts
D. 22 kilovolts
Answer : D

13. In a four wheel drive (4WD), the numbers of gear boxes are
A. 1
B. 2
C. 3
D. 4
Answer : B

14. The condition that results in large quantities of HC emission is
A. High temperature combustion
B. Incomplete combustion
C. Low temperature combustion
D. High atmospheric temperature combustion
Answer : B

15. The connecting rod connects the piston and the
A. Cylinder head
B. Cylinder block
C. Camshaft
D. Crankshaft
Answer : D

16. In an engine, the temperature of the piston will be more at the
A. Crown of the piston
B. Skirt of the piston
C. Piston walls
D. Piston rings
Answer : A

17. If the engine coolant leaks into the engine oil, then engine oil
A. Appears milky
B. Become foamy
C. Turns black
D. None of these
Answer : A

18. The included angle is the sum of the
A. Camber and castor
B. Castor and S.A.I.
C. Camber and S.A.I.
D. Camber and toe in
Answer : C

19. The aluminium alloy is used in cylinder blocks because
A. It is lighter and has good heat dissipation characteristics
B. Material cost is low
C. It does not require any cylinder liners
D. The piston is also made of aluminium alloy
Answer : A

20. The auto ignition in a spark ignition engine means
A. Automatic ignition of the charge at the end of compression
B. Ignition induced by the passage of a spark
C. Ignition of the charge before the passage of flame front
D. Ignition induced to supplement the process of normal combustion
Answer : C

21. Damper in an automobile is used to
A. Absorb the energy
B. Dissipate the energy
C. Release the energy
D. Increase the energy
Answer : B

22. The sequence order of events in a four stroke engine is
A. Suction exhaust power compression
B. Suction power compression exhaust
C. Suction compression power exhaust
D. Exhaust compression power suction
Answer : C

23. The specific gravity of petrol is about
A. 0.75
B. 0.85
C. 0.95
D. 1.25
Answer : A

24. When the battery is half (50%) charged, the specific gravity of acid in a battery is usually
A. 0.74
B. 1.00
C. 1.12
D. 1.19
Answer : D

25. The main merit of a multi cylinder type cylinder sleeve is
A. Smaller engine dimensions
B. Better cooling efficiency
C. High rigidity
D. None of these
Answer : A

26. 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 : B

27. 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 : C

28. The caster is called positive when the top of the king pin is inclined to the
A. Rear of the vehicle
B. Front of the vehicle
C. Left of the vehicle
D. Right of the vehicle
Answer : A

29. The Diesel engines are also known as
A. Spark ignition (S.I.) engines
B. Compression ignition (C.I.) engines
C. Steam engines
D. None of these
Answer : B

30. Tachometer in a vehicle measures
A. Speed
B. Distance
C. Engine r.p.m.
D. Fuel consumption
Answer : C

31. During braking, the brake shoe is moved outward to force the lining against the
A. Wheel piston or cylinder
B. Anchor pin
C. Brake drum
D. Wheel rim or axle
Answer : C

32. An oil filter bypass valve opens when the
A. Engine is cold
B. Engine overheats
C. Oil filter becomes clogged
D. Engine runs at high speed
Answer : C

33. The connecting rod is attached to the piston by the
A. Cap bolt
B. Piston pin
C. Cap roller bearing
D. Rod cap
Answer : B

34. An overinflated tyre will wear the tread most near the
A. Edges
B. Corners
C. Centre
D. None of these
Answer : C

35. In a four stroke engine for each crankshaft revolution, the camshaft revolves
A. One half turn
B. One turn
C. Two turns
D. Four turns
Answer : A

36. Caster is a
A. Forward tilt of the kingpin
B. Backward tilt of the kingpin
C. Either 'A' or 'B'
D. None of these
Answer : C

37. The parking brakes employed in vehicles are operated
A. Mechanically
B. Hydraulically
C. Pneumatically
D. None of these
Answer : A

38. A basic difference between the spark ignition engine and the Diesel engine is that the
A. Diesel engine compresses air alone instead of an air-fuel mixture
B. Air temperature ignites the fuel in the Diesel engine
C. Fuel is sprayed into the combustion chamber in the Diesel engine as the piston nears T.D.C. on the compression stroke
D. All of the above
Answer : D

39. In comparison with a radial tyre, one advantage of a bias ply tyre is
A. Longer life
B. Lower rolling resistance
C. Smoother ride at low speeds
D. None of these
Answer : C

40. The basic part of the engine, to which the other engine parts are attached or assembled is the
A. Cylinder head
B. Crankshaft
C. Cylinder block
D. Oil pan
Answer : C

41. The function of positive crankcase ventilation (PCV) system is that it
A. Mixes fuel with air
B. Promotes combustion by creating a swirling movement in the air-fuel mixture
C. Returns blow by gases from the crankcase to the intake system
D. Feeds blow by gases to the exhaust manifold
Answer : C

42. The rolling resistance is because of the friction between the
A. Wheel rim and tyre
B. Tyre and the road surface
C. Wheel rim and road surface
D. None of these
Answer : B

43. The starting system includes
A. A battery, a starter, and an ignition switch
B. A battery, a distributor, and an ignition switch
C. A battery, a starter, and a distributor
D. A distributor, a starter, and an ignition switch
Answer : A

44. The Diesel engines as compared to petrol engines require
A. Bigger flywheel
B. Smaller flywheel
C. Same size of flywheel
D. No flywheel
Answer : A

45. When the top of the wheel is tilted outward, then it is called
A. Positive camber
B. Negative camber
C. Positive caster
D. Negative caster
Answer : A

46. The main characteristics of a maintenance free (MF) battery is that
A. A maintenance free battery requires little maintenance during normal use and it is sufficient to add water instead of an electrolyte containing sulphuric acid
B. A maintenance free battery has a relatively short shelf life when compared with standard batteries
C. Since it is sealed, the water in maintenance free battery is not lost through evaporation thus accordingly it is not necessary to top up the cells with water
D. Recharging of a maintenance free battery is neither required nor possible
Answer : C

47. The process of removing the burnt gases from the engine cylinder by the fresh charge coming into the engine cylinder from the crankcase, is known as
A. Cleaning
B. Priming
C. Scavenging
D. Detonation
Answer : C

48. When turning a corner
A. The front wheels are toeing out
B. The front wheels are turning on different angles
C. The inside front wheels has a greater angle than the outside wheel
D. All of the above
Answer : D

49. The power actually developed inside the engine cylinder is called as
A. Indicated power
B. Brake power
C. Frictional power
D. None of these
Answer : A

50. The process of supplying the intake air to the engine cylinder at a pressure greater than the pressure of the surrounding atmosphere is known as
A. Supercharging
B. Auto ignition
C. Scavenging
D. Detonation
Answer : A