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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 specific gravity of Diesel is about

0.65

0.85

0.95

0.75

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

Small end

Big end

Journal

Crank arm

3. The specific gravity of petrol is about

1.25

0.95

0.75

0.85

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

All of these

Improved emission

Improved fuel efficiency

Improved power output

5. The power source for a brake booster is

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

Electricity

Hydraulic pump

Exhaust manifold pressure

6. The Diesel engine works on

Diesel cycle

Carnot cycle

Otto cycle

Rankine cycle

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

Ignition warning bulb

Stop light bulb

Parking light bulb

Head light bulb

8. The parking brake generally acts on

Front wheels

Front and rear wheels

Propeller shaft

Rear wheels

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 damper spring tension

Adjust the tyre pressure

10. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Carbon disulphide

Freon-12

Ethylene glycol

Page 2 of 5

11. Bead wires are made of

Copper

Steel

Aluminium

Zinc

12. The effect of having excess camber is

Excessive steering alignment torque

Uneven tyre wear

Too much traction

Hard steering

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

100

90

110

120

14. 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

15. Cushioning springs in clutch plate reduces

None of these

Jerky starts

Torsional vibrations

Vehicle speed

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

Belt driven by drive-shaft

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by crankshaft

17. 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; each pinion gear meshes with a different side gear.

The differential carrier houses differential pinion gears and side gears.

The drive shafts are splined to the differential carrier.

18. 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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

19. The brake pedal during ABS operation

All of the above

Pedal stroke becomes longer

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

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

1-2-4-3

1-2-3-4

1-3-4-2

1-3-2-4

Page 3 of 5

21. The Diesel engines are also known as

None of these

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

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

Incomplete valve closure

Overheating of the engine

None of these

Fouling of spark plug by gasoline

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

Trucks

Passenger cars

Matadors

Tractors

24. 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

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

Smaller than the positive terminal post

None of these

Of the same size as the positive terminal post

Larger than the positive terminal post

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

82

14

175

65

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

Air temperature

Air-fuel ratio

Exhaust gas volume

Air flow speed

28. Engine misfiring is likely to result from

Spark plug gap too small

Vapours lock in the fuel only

Spark plug gap too wide

Incorrect fuel air mixture

29. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 30

SAE 70

30. Odometer is an instrument used for measurement of

Engine r.p.m.

Power

Distance

Fuel consumption

Page 4 of 5

31. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

32. 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

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

2.81

1.00

1.82

1.28

34. The fuel that detonates easily, is

Alcohol

N-heptane

Benzene

Iso-octane

35. 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

36. 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

Maintain directional control

Prevent uneven tyre wear

37. The ease with which petrol vaporizes is called its

Oxidation

Volatility

Octane number

Cetane number

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

15%

20%

10%

5%

39. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Extreme length of the vehicle

40. 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/2

P.L.A.N

P.L.A.N/4

Page 5 of 5

41. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

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

Large particles

Sharp edged fragments

None of these

Small particles

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

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

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

Moves the synchronizer

Selects the synchronizer

Operates the clutch

Meshes the gears

45. The valve tappet clearance is measured by

Screw pitch gauge

Engineering scale

Feeler gauge

Vernier caliper

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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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