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Automobile Engineering MCQs
0

Automobile Engineering Practice Set-6

August 8, 2021

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Page 1 of 5

1. If the valve clearances are excessively large, the problem that can arise is

None of these

Fouling of spark plug by gasoline

Overheating of the engine

Incomplete valve closure

2. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

3. When the piston is at T.D.C., the volume above the piston in the combustion chamber is the

Clearance volume

Cylinder volume

Exhaust volume

None of these

4. Two speed reverse gear arrangements is generally provided in case of

Trucks

Matadors

Passenger cars

Tractors

5. Which one of the following statement correctly describes the construction of a bevel gear type differential?

The drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

The left side gear and the differential carrier rotate in constant unison.

6. The fuel that detonates easily, is

Iso-octane

Alcohol

Benzene

N-heptane

7. The valve tappet clearance is measured by

Engineering scale

Feeler gauge

Vernier caliper

Screw pitch gauge

8. Engine misfiring is likely to result from

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too wide

Spark plug gap too small

9. The negative terminal post on the top of a battery is

Of the same size as the positive terminal post

Smaller than the positive terminal post

Larger than the positive terminal post

None of these

10. The connecting rod lower end is connected to the relevant ________ of crankshaft.

Big end

Crank arm

Small end

Journal

Page 2 of 5

11. If a tyre is designated as 175/65 R-14 82-S, then the aspect ratio for the tyre is

82

14

175

65

12. Which of the following bulb in a car will have the least wattage?

Stop light bulb

Ignition warning bulb

Head light bulb

Parking light bulb

13. The information provided by the oxygen (O₂) sensor to the feedback control system is about the

Air-fuel ratio

Air flow speed

Air temperature

Exhaust gas volume

14. The parking brake generally acts on

Rear wheels

Propeller shaft

Front and rear wheels

Front wheels

15. The specific gravity of acid in a fully charged battery is generally

2.81

1.00

1.28

1.82

16. The correct way to rectify an imbalanced wheel is to

Adjust the tyre pressure

Rotate the tyres

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

17. Cushioning springs in clutch plate reduces

None of these

Jerky starts

Vehicle speed

Torsional vibrations

18. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Reduces intake noise

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

19. Bead wires are made of

Copper

Steel

Aluminium

Zinc

20. The gear shift lever requires two separate motions to shift gears, and the first movement

Moves the synchronizer

Operates the clutch

Selects the synchronizer

Meshes the gears

Page 3 of 5

21. The specific gravity of Diesel is about

0.85

0.95

0.65

0.75

22. The basic purpose of providing caster angle on wheels is to

Maintain directional control

Compensate for wear in the steering linkage

Bring the road contact of the tyre under the point of load

Prevent uneven tyre wear

23. The advantage of the fuel injection system over the carburettor system is

Improved fuel efficiency

Improved power output

Improved emission

All of these

24. The Diesel engine works on

Diesel cycle

Otto cycle

Rankine cycle

Carnot cycle

25. The effect of having excess camber is

Hard steering

Uneven tyre wear

Excessive steering alignment torque

Too much traction

26. The indicated power of a four stroke engine (in watts) is equal to (where P = Mean effective pressure in N/m², L = Length of stroke in metres, A = Cross-sectional area of the piston in m², and N = Speed of the engine in revolutions per second (r.p.s)

P.L.A.N/2

P.L.A.N/4

2 × P.L.A.N

P.L.A.N

27. Tachometer in a vehicle measures

Fuel consumption

Engine r.p.m.

Distance

Speed

28. The Diesel engines are also known as

Spark ignition (S.I.) engines

Steam engines

None of these

Compression ignition (C.I.) engines

29. Which of the following symptom is caused as a result of brake disc run out?

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

Ineffectiveness of the brakes

30. The forced fed lubrication system means that the oil is delivered to the engine by

None of these

Splashing action of the crankshaft

Gravity

The pressure created by the oil pump

Page 4 of 5

31. A heat treated glass generally used in automobiles bursts into ________ upon cracking,

None of these

Large particles

Sharp edged fragments

Small particles

32. The power source for a brake booster is

Hydraulic pump

Electricity

The pressure difference between the atmospheric pressure and the vacuum pressure in the intake manifold

Exhaust manifold pressure

33. The minimum parking brake force is generally ___________ of gross vehicle mass (GVM).

5%

15%

20%

10%

34. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Fuel consumption

Distance

35. The specific gravity of petrol is about

1.25

0.75

0.95

0.85

36. Incorrect steering axis inclination (S.A.I.) causes

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

37. The octane number of compressed natural gas (CNG) is

120

100

110

90

38. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 40

SAE 70

39. The firing order for an inline four cylinder I.C. engine is

1-2-4-3

1-2-3-4

1-3-4-2

1-3-2-4

40. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Page 5 of 5

41. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maximise the fuel economy

Maintain constant engine speed

42. In a hydraulic power steering system, the power steering pump is driven by a

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

43. The function of an alternator in an automobile is to

Supply electric power

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

44. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Ammonium chloride

Freon-12

45. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

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A Demrot is the founder of VideRime Online Learning, a leading engineering website. He did his BE Civil and M.Tech Structure from RGPV University, Bhopal and has been working as an Assistant Professor in a reputed college.

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