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

Sharp edged fragments

Large particles

None of these

Small particles

2. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 80

SAE 30

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

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by drive-shaft

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

Of the same size as the positive terminal post

Larger than the positive terminal post

None of these

Smaller than the positive terminal post

5. The specific gravity of Diesel is about

0.85

0.95

0.65

0.75

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

Tractors

Passenger cars

Matadors

Trucks

7. The specific gravity of petrol is about

0.85

1.25

0.75

0.95

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

The drive shafts are splined to the differential carrier.

The differential carrier houses differential pinion gears and side gears.

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.

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

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

10. The parking brake generally acts on

Propeller shaft

Rear wheels

Front and rear wheels

Front wheels

Page 2 of 5

11. The effect of having excess camber is

Hard steering

Excessive steering alignment torque

Too much traction

Uneven tyre wear

12. The Diesel engine works on

Otto cycle

Carnot cycle

Diesel cycle

Rankine cycle

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

1-3-4-2

1-2-4-3

1-3-2-4

1-2-3-4

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

The pressure created by the oil pump

Gravity

None of these

Splashing action of the crankshaft

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

15%

20%

5%

10%

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

None of these

Cylinder volume

Clearance volume

Exhaust volume

17. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

18. The valve tappet clearance is measured by

Engineering scale

Feeler gauge

Vernier caliper

Screw pitch gauge

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

Adjust the tyre pressure

Adjust the damper spring tension

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

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

Rapid wearing of the brake pads

Ineffectiveness of the brakes

Localized wearing of the brake pads

Judder during braking

Page 3 of 5

21. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the front tyres

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

Incomplete valve closure

Fouling of spark plug by gasoline

Overheating of the engine

None of these

23. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Fuel consumption

Power

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

All of these

Improved emission

Improved power output

Improved fuel efficiency

25. Cushioning springs in clutch plate reduces

None of these

Torsional vibrations

Jerky starts

Vehicle speed

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

82

65

175

14

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

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

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

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

29. The power source for a brake booster is

Exhaust manifold pressure

Electricity

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

Hydraulic pump

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

Journal

Small end

Big end

Crank arm

Page 4 of 5

31. The brake pedal during ABS operation

All of the above

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

Is pushed upward forcefully

32. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Carbon disulphide

Ethylene glycol

Freon-12

33. The fuel that detonates easily, is

Alcohol

N-heptane

Iso-octane

Benzene

34. Bead wires are made of

Aluminium

Steel

Copper

Zinc

35. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

None of these

36. 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

37. The ease with which petrol vaporizes is called its

Octane number

Cetane number

Oxidation

Volatility

38. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

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

1.00

1.82

2.81

1.28

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

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

Prevent uneven tyre wear

Maintain directional control

Compensate for wear in the steering linkage

Page 5 of 5

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

100

90

110

120

42. Engine misfiring is likely to result from

Spark plug gap too wide

Incorrect fuel air mixture

Spark plug gap too small

Vapours lock in the fuel only

43. The main function of intake manifold is that it

Reduces intake noise

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

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

Moves the synchronizer

Meshes the gears

Operates the clutch

Selects the synchronizer

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

Parking light bulb

Head light bulb

Stop light bulb

Ignition warning bulb

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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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