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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

90

100

2. 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

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

Big end

Crank arm

Small end

Journal

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

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

6. 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

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

Air-fuel ratio

Air temperature

Exhaust gas volume

Air flow speed

8. The valve tappet clearance is measured by

Engineering scale

Screw pitch gauge

Feeler gauge

Vernier caliper

9. 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

10. Tachometer in a vehicle measures

Speed

Fuel consumption

Engine r.p.m.

Distance

Page 2 of 5

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

Trucks

Passenger cars

Matadors

Tractors

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

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

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 parking brake generally acts on

Rear wheels

Front and rear wheels

Propeller shaft

Front wheels

15. Odometer is an instrument used for measurement of

Distance

Engine r.p.m.

Fuel consumption

Power

16. The specific gravity of petrol is about

0.75

0.85

1.25

0.95

17. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Reduces intake noise

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

18. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Extreme length of the vehicle

Distance between the centres of the front tyres

19. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Ammonium chloride

Carbon disulphide

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

None of these

Sharp edged fragments

Small particles

Large particles

Page 3 of 5

21. The specific gravity of Diesel is about

0.65

0.75

0.95

0.85

22. The fuel that detonates easily, is

Alcohol

Iso-octane

N-heptane

Benzene

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

20%

15%

10%

5%

24. The Diesel engines are also known as

None of these

Steam engines

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

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

1-3-2-4

1-3-4-2

1-2-3-4

1-2-4-3

26. The effect of having excess camber is

Hard steering

Uneven tyre wear

Excessive steering alignment torque

Too much traction

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

Splashing action of the crankshaft

The pressure created by the oil pump

None of these

Gravity

28. The power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

Electricity

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

29. Which of the following oil is more viscous?

SAE 70

SAE 80

SAE 30

SAE 40

30. 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

Page 4 of 5

31. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

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

14

175

65

82

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

Meshes the gears

Moves the synchronizer

Selects the synchronizer

Operates the clutch

34. Cushioning springs in clutch plate reduces

Torsional vibrations

Vehicle speed

None of these

Jerky starts

35. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the power

Limit the vehicle speed

Maximise the fuel economy

36. 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

37. 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

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

1.82

1.28

2.81

1.00

39. Bead wires are made of

Steel

Zinc

Copper

Aluminium

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

Improved power output

Improved emission

All of these

Improved fuel efficiency

Page 5 of 5

41. 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

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

Overheating of the engine

Fouling of spark plug by gasoline

None of these

Incomplete valve closure

43. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

All of the above

44. The Diesel engine works on

Carnot cycle

Diesel cycle

Otto cycle

Rankine cycle

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

Larger than the positive terminal post

Of the same size as the positive terminal post

Smaller than the positive terminal post

None of these

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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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