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

14

175

65

82

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

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

3. 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.

4. 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

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

Clearance volume

Cylinder volume

None of these

Exhaust volume

6. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

All of the above

Pedal stroke becomes longer

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

Exhaust gas volume

Air temperature

Air-fuel ratio

Air flow speed

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

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

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

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

None of these

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

100

90

120

110

Page 2 of 5

11. The specific gravity of Diesel is about

0.75

0.95

0.85

0.65

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

Trucks

Tractors

Matadors

Passenger cars

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

Improved fuel efficiency

Improved emission

Improved power output

All of these

14. The Diesel engines are also known as

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

Steam engines

None of these

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

Small end

Crank arm

Big end

Journal

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

Small particles

Large particles

None of these

Sharp edged fragments

17. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Carbon disulphide

Freon-12

Ammonium chloride

18. 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

19. The ease with which petrol vaporizes is called its

Octane number

Cetane number

Oxidation

Volatility

20. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Reduces intake noise

Cools the intake air to a suitable temperature

Page 3 of 5

21. Tachometer in a vehicle measures

Speed

Distance

Fuel consumption

Engine r.p.m.

22. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Fuel consumption

Power

23. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the power

Limit the vehicle speed

Maintain constant engine speed

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

5%

15%

20%

10%

25. The valve tappet clearance is measured by

Vernier caliper

Engineering scale

Screw pitch gauge

Feeler gauge

26. Bead wires are made of

Aluminium

Zinc

Steel

Copper

27. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Jerky starts

Vehicle speed

28. The parking brake generally acts on

Front and rear wheels

Front wheels

Propeller shaft

Rear wheels

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

Rotate the tyres

Adjust the damper spring tension

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

30. 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)

2 × P.L.A.N

P.L.A.N/4

P.L.A.N/2

P.L.A.N

Page 4 of 5

31. 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 rear tyres

Distance between the centres of the front tyres

32. The fuel that detonates easily, is

Iso-octane

N-heptane

Benzene

Alcohol

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

Continually recharges the battery

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

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

Overheating of the engine

None of these

Fouling of spark plug by gasoline

Incomplete valve closure

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

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

36. The Diesel engine works on

Carnot cycle

Otto cycle

Diesel cycle

Rankine cycle

37. The specific gravity of petrol is about

0.95

0.75

1.25

0.85

38. The effect of having excess camber is

Hard steering

Too much traction

Excessive steering alignment torque

Uneven tyre wear

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

Operates the clutch

Moves the synchronizer

Meshes the gears

Selects the synchronizer

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

Splashing action of the crankshaft

None of these

Gravity

The pressure created by the oil pump

Page 5 of 5

41. Which of the following oil is more viscous?

SAE 70

SAE 80

SAE 40

SAE 30

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

Stop light bulb

Ignition warning bulb

Parking light bulb

Head light bulb

43. The power source for a brake booster is

Hydraulic pump

Electricity

Exhaust manifold pressure

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

44. 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

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

1.00

1.82

2.81

1.28

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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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