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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

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

None of these

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

Smaller than the positive terminal post

Larger than the positive terminal post

None of these

Of the same size as the positive terminal post

3. The fuel that detonates easily, is

Benzene

Iso-octane

N-heptane

Alcohol

4. The Diesel engines are also known as

Steam engines

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

5. 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

6. The parking brake generally acts on

Front and rear wheels

Rear wheels

Front wheels

Propeller shaft

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

Supply electric power

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

8. Engine misfiring is likely to result from

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too small

Spark plug gap too wide

9. The valve tappet clearance is measured by

Vernier caliper

Feeler gauge

Engineering scale

Screw pitch gauge

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

Meshes the gears

Moves the synchronizer

Operates the clutch

Selects the synchronizer

Page 2 of 5

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

Clearance volume

None of these

Exhaust volume

Cylinder volume

12. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

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

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by crankshaft

Belt driven by camshaft

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

Head light bulb

Stop light bulb

Ignition warning bulb

Parking light bulb

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

Improved emission

Improved power output

All of these

Improved fuel efficiency

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

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

The differential carrier houses differential pinion gears and side gears.

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.

17. Cushioning springs in clutch plate reduces

None of these

Torsional vibrations

Jerky starts

Vehicle speed

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

Air temperature

Air flow speed

Air-fuel ratio

Exhaust gas volume

19. Tachometer in a vehicle measures

Fuel consumption

Engine r.p.m.

Speed

Distance

20. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

Page 3 of 5

21. The ease with which petrol vaporizes is called its

Cetane number

Oxidation

Volatility

Octane number

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

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

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

14

82

65

175

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

1.82

2.81

1.00

1.28

25. Which of the following oil is more viscous?

SAE 30

SAE 40

SAE 70

SAE 80

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

1-2-3-4

1-3-2-4

1-2-4-3

1-3-4-2

27. 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

P.L.A.N/2

2 × P.L.A.N

28. The power source for a brake booster is

Hydraulic pump

Exhaust manifold pressure

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

Electricity

29. The Diesel engine works on

Otto cycle

Diesel cycle

Carnot cycle

Rankine cycle

30. 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

Page 4 of 5

31. 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

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

Small particles

None of these

Large particles

Sharp edged fragments

33. The specific gravity of petrol is about

0.95

1.25

0.85

0.75

34. Bead wires are made of

Copper

Aluminium

Zinc

Steel

35. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Engine r.p.m.

Power

36. 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

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

Tractors

Matadors

Passenger cars

Trucks

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

Journal

Crank arm

Small end

Big end

39. The brake pedal during ABS operation

Is pushed upward forcefully

All of the above

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

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

5%

20%

15%

10%

Page 5 of 5

41. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Uneven tyre wear

Too much traction

42. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Ethylene glycol

Freon-12

Carbon disulphide

43. The specific gravity of Diesel is about

0.85

0.75

0.65

0.95

44. The function of a governor in automobiles is to

Maintain constant engine speed

Maximise the fuel economy

Limit the power

Limit the vehicle speed

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

110

90

120

100

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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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