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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

0.85

0.75

0.95

0.65

2. The specific gravity of petrol is about

0.95

1.25

0.85

0.75

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

Journal

Small end

Big end

Crank arm

4. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Carbon disulphide

Freon-12

Ethylene glycol

5. The effect of having excess camber is

Too much traction

Hard steering

Excessive steering alignment torque

Uneven tyre wear

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

15%

10%

5%

20%

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

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

Ineffectiveness of the brakes

8. Tachometer in a vehicle measures

Engine r.p.m.

Speed

Fuel consumption

Distance

9. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

10. The Diesel engines are also known as

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

Steam engines

Page 2 of 5

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

Maintain directional control

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

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

Rotate the tyres

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

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

All of these

Improved fuel efficiency

Improved emission

Improved power output

14. Wheel base of a vehicle is the

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the rear tyres

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

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

16. The valve tappet clearance is measured by

Feeler gauge

Vernier caliper

Screw pitch gauge

Engineering scale

17. The main function of intake manifold is that it

Reduces intake noise

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

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

Selects the synchronizer

Meshes the gears

Moves the synchronizer

Operates the clutch

19. 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

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

Cylinder volume

None of these

Exhaust volume

Clearance volume

Page 3 of 5

21. The brake pedal during ABS operation

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

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

1-3-2-4

1-3-4-2

1-2-4-3

1-2-3-4

23. The fuel that detonates easily, is

Alcohol

Iso-octane

N-heptane

Benzene

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

Trucks

Matadors

Tractors

Passenger cars

25. The ease with which petrol vaporizes is called its

Octane number

Oxidation

Cetane number

Volatility

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

1.00

1.82

2.81

1.28

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

Stop light bulb

Parking light bulb

Ignition warning bulb

Head light bulb

28. 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; 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.

The differential carrier houses differential pinion gears and side gears.

29. Odometer is an instrument used for measurement of

Power

Fuel consumption

Distance

Engine r.p.m.

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

None of these

Overheating of the engine

Fouling of spark plug by gasoline

Incomplete valve closure

Page 4 of 5

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

Smaller than the positive terminal post

Of the same size as the positive terminal post

Larger than the positive terminal post

None of these

32. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 70

SAE 30

33. Cushioning springs in clutch plate reduces

Vehicle speed

Torsional vibrations

Jerky starts

None of these

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

Sharp edged fragments

Small particles

Large particles

None of these

35. 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/2

P.L.A.N/4

2 × P.L.A.N

P.L.A.N

36. Engine misfiring is likely to result from

Spark plug gap too wide

Vapours lock in the fuel only

Spark plug gap too small

Incorrect fuel air mixture

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

Exhaust gas volume

Air-fuel ratio

Air temperature

Air flow speed

38. The power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

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

Electricity

39. The parking brake generally acts on

Rear wheels

Propeller shaft

Front and rear wheels

Front wheels

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

175

65

14

82

Page 5 of 5

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

110

100

90

120

42. The Diesel engine works on

Otto cycle

Rankine cycle

Diesel cycle

Carnot cycle

43. Bead wires are made of

Steel

Aluminium

Copper

Zinc

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

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

Chain driven by crankshaft

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

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Continually recharges the battery

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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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