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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 octane number of compressed natural gas (CNG) is

110

120

100

90

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

Ineffectiveness of the brakes

Judder during braking

Localized wearing of the brake pads

Rapid wearing of the brake pads

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Rotate the tyres

Adjust the damper spring tension

4. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ammonium chloride

Ethylene glycol

5. Bead wires are made of

Steel

Copper

Aluminium

Zinc

6. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Reduces intake noise

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

Smaller than the positive terminal post

None of these

Larger than the positive terminal post

Of the same size as the positive terminal post

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

None of these

Clearance volume

Cylinder volume

Exhaust volume

9. The brake pedal during ABS operation

All of the above

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

Is pushed upward forcefully

10. The specific gravity of petrol is about

0.85

0.95

1.25

0.75

Page 2 of 5

11. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Distance

Fuel consumption

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

Improved power output

Improved fuel efficiency

All of these

Improved emission

13. Engine misfiring is likely to result from

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too wide

14. 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

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

Air flow speed

Air temperature

Air-fuel ratio

Exhaust gas volume

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

Matadors

Tractors

Passenger cars

Trucks

17. The effect of having excess camber is

Excessive steering alignment torque

Too much traction

Hard steering

Uneven tyre wear

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

Big end

Crank arm

Journal

Small end

19. 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

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

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

Page 3 of 5

21. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 30

SAE 70

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

1-3-2-4

1-2-4-3

1-2-3-4

1-3-4-2

23. The Diesel engine works on

Otto cycle

Diesel cycle

Carnot cycle

Rankine cycle

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

15%

5%

20%

10%

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

Small particles

Large particles

None of these

Sharp edged fragments

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

The pressure created by the oil pump

Splashing action of the crankshaft

None of these

Gravity

27. The Diesel engines are also known as

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

Steam engines

28. The specific gravity of Diesel is about

0.95

0.75

0.65

0.85

29. The fuel that detonates easily, is

N-heptane

Benzene

Iso-octane

Alcohol

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

Incomplete valve closure

None of these

Overheating of the engine

Fouling of spark plug by gasoline

Page 4 of 5

31. Odometer is an instrument used for measurement of

Distance

Power

Engine r.p.m.

Fuel consumption

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

1.00

2.81

1.82

1.28

33. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Screw pitch gauge

Feeler gauge

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

82

65

14

175

35. The parking brake generally acts on

Front and rear wheels

Propeller shaft

Rear wheels

Front wheels

36. Cushioning springs in clutch plate reduces

Vehicle speed

None of these

Torsional vibrations

Jerky starts

37. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

38. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

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

Selects the synchronizer

Meshes the gears

Operates the clutch

Moves the synchronizer

40. 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.

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/4

P.L.A.N/2

P.L.A.N

2 × P.L.A.N

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

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by camshaft

43. The ease with which petrol vaporizes is called its

Cetane number

Oxidation

Volatility

Octane number

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

Maintain directional control

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

Ignition warning bulb

Head light bulb

Stop light bulb

Parking light bulb

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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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