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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. The specific gravity of petrol is about

0.95

0.75

1.25

0.85

2. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

3. The ease with which petrol vaporizes is called its

Oxidation

Cetane number

Octane number

Volatility

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

Passenger cars

Trucks

Tractors

Matadors

5. Tachometer in a vehicle measures

Fuel consumption

Distance

Engine r.p.m.

Speed

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

14

175

82

65

7. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Front wheels

Rear wheels

8. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Reduces intake noise

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

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

Continually recharges the battery

Converts mechanical energy into electrical energy

Supply electric power

Partly converts engine power into electric power

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

1.28

1.82

2.81

1.00

Page 2 of 5

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

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

Maintain directional control

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

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

None of these

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

Ignition warning bulb

Head light bulb

Parking light bulb

Stop light bulb

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

Adjust the damper spring tension

Rotate the tyres

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

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

Small end

Crank arm

Big end

Journal

16. Cushioning springs in clutch plate reduces

Vehicle speed

None of these

Torsional vibrations

Jerky starts

17. Bead wires are made of

Aluminium

Copper

Zinc

Steel

18. 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

19. 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; each pinion gear meshes with a different side gear.

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

The differential carrier houses differential pinion gears and side gears.

20. The specific gravity of Diesel is about

0.95

0.65

0.75

0.85

Page 3 of 5

21. The function of a governor in automobiles is to

Limit the power

Limit the vehicle speed

Maintain constant engine speed

Maximise the fuel economy

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

Gravity

None of these

The pressure created by the oil pump

Splashing action of the crankshaft

23. The Diesel engines are also known as

Spark ignition (S.I.) engines

Steam engines

None of these

Compression ignition (C.I.) engines

24. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Feeler gauge

Engineering scale

25. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Engine r.p.m.

Power

26. The brake pedal during ABS operation

All of the above

Is pushed upward forcefully

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

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

Improved fuel efficiency

All of these

Improved emission

Improved power output

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

100

90

120

110

29. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 40

SAE 70

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

Air flow speed

Air-fuel ratio

Air temperature

Exhaust gas volume

Page 4 of 5

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

Small particles

None of these

Large particles

Sharp edged fragments

32. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Hard steering

Uneven tyre wear

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

1-2-4-3

1-3-2-4

1-2-3-4

1-3-4-2

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

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

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

None of these

Cylinder volume

Clearance volume

Exhaust volume

36. The power source for a brake booster is

Electricity

Exhaust manifold pressure

Hydraulic pump

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

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

Meshes the gears

Selects the synchronizer

Operates the clutch

Moves the synchronizer

38. Engine misfiring is likely to result from

Spark plug gap too wide

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too small

39. The Diesel engine works on

Rankine cycle

Otto cycle

Diesel cycle

Carnot cycle

40. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Carbon disulphide

Freon-12

Ethylene glycol

Page 5 of 5

41. 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

P.L.A.N/4

P.L.A.N/2

2 × P.L.A.N

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

10%

5%

15%

20%

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

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Chain driven by crankshaft

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

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

Rapid wearing of the brake pads

45. The fuel that detonates easily, is

Benzene

Iso-octane

N-heptane

Alcohol

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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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