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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 ease with which petrol vaporizes is called its

Volatility

Oxidation

Octane number

Cetane number

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

Passenger cars

Tractors

Matadors

Trucks

3. The brake pedal during ABS operation

All of the above

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

Pedal stroke becomes longer

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

5%

20%

15%

10%

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

Stop light bulb

Parking light bulb

Head light bulb

Ignition warning bulb

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

Improved fuel efficiency

Improved power output

All of these

Improved emission

7. The function of a governor in automobiles is to

Limit the power

Limit the vehicle speed

Maintain constant engine speed

Maximise the fuel economy

8. The specific gravity of Diesel is about

0.65

0.85

0.95

0.75

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

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

Adjust the tyre pressure

Adjust the damper spring tension

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

110

90

100

120

Page 2 of 5

11. 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

2 × P.L.A.N

P.L.A.N

P.L.A.N/4

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

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

Generation of a braking effect at tight corners

13. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

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

Air flow speed

Air-fuel ratio

Exhaust gas volume

Air temperature

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

Gravity

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

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

Exhaust volume

Clearance volume

None of these

Cylinder volume

17. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Reduces intake noise

Distributes intake air equally to the cylinders

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

Rapid wearing of the brake pads

Localized wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

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

Big end

Small end

Journal

Crank arm

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

Continually recharges the battery

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Supply electric power

Page 3 of 5

21. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Freon-12

Ethylene glycol

Carbon disulphide

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

1-2-3-4

1-2-4-3

1-3-4-2

1-3-2-4

23. 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

24. The fuel that detonates easily, is

Benzene

N-heptane

Iso-octane

Alcohol

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

2.81

1.00

1.28

1.82

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

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.

The drive shafts are splined to the differential carrier.

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

14

65

175

82

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

None of these

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

29. The valve tappet clearance is measured by

Engineering scale

Screw pitch gauge

Feeler gauge

Vernier caliper

30. The specific gravity of petrol is about

1.25

0.75

0.85

0.95

Page 4 of 5

31. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

None of these

32. Engine misfiring is likely to result from

Spark plug gap too wide

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

33. Tachometer in a vehicle measures

Engine r.p.m.

Fuel consumption

Distance

Speed

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

Selects the synchronizer

Meshes the gears

Moves the synchronizer

Operates the clutch

35. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Front wheels

Rear wheels

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

Maintain directional control

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

37. The Diesel engine works on

Diesel cycle

Carnot cycle

Otto cycle

Rankine cycle

38. The effect of having excess camber is

Uneven tyre wear

Too much traction

Excessive steering alignment torque

Hard steering

39. Bead wires are made of

Aluminium

Zinc

Copper

Steel

40. The power source for a brake booster is

Hydraulic pump

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

Exhaust manifold pressure

Electricity

Page 5 of 5

41. Cushioning springs in clutch plate reduces

None of these

Vehicle speed

Torsional vibrations

Jerky starts

42. Which of the following oil is more viscous?

SAE 30

SAE 80

SAE 40

SAE 70

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

Of the same size as the positive terminal post

Larger than the positive terminal post

None of these

Smaller than the positive terminal post

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

Small particles

Sharp edged fragments

Large particles

None of these

45. Odometer is an instrument used for measurement of

Distance

Engine r.p.m.

Fuel consumption

Power

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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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