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

10%

5%

20%

15%

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

Head light bulb

Parking light bulb

Ignition warning bulb

Stop light bulb

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

Maintain directional control

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

1.82

1.00

1.28

2.81

5. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 40

SAE 70

6. The commonly used antifreeze solution in automobiles is

Freon-12

Ammonium chloride

Carbon disulphide

Ethylene glycol

7. 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

8. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Uneven tyre wear

Too much traction

9. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

10. The fuel that detonates easily, is

Alcohol

Iso-octane

N-heptane

Benzene

Page 2 of 5

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

1-2-3-4

1-2-4-3

1-3-2-4

1-3-4-2

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

Improved fuel efficiency

Improved power output

All of these

Improved emission

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

Air temperature

Air flow speed

Exhaust gas volume

Air-fuel ratio

14. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

15. The parking brake generally acts on

Rear wheels

Front wheels

Front and rear wheels

Propeller shaft

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

Small particles

Sharp edged fragments

None of these

Large particles

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Rotate the tyres

Adjust the tyre pressure

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

Small end

Journal

Crank arm

Big end

19. 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

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

Moves the synchronizer

Operates the clutch

Selects the synchronizer

Meshes the gears

Page 3 of 5

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

None of these

Larger than the positive terminal post

Of the same size as the positive terminal post

Smaller than the positive terminal post

22. The power source for a brake booster is

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

Hydraulic pump

Electricity

Exhaust manifold pressure

23. 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 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.

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

Exhaust volume

Cylinder volume

Clearance volume

None of these

25. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too wide

Spark plug gap too small

Vapours lock in the fuel only

26. Bead wires are made of

Zinc

Aluminium

Copper

Steel

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

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

28. Tachometer in a vehicle measures

Engine r.p.m.

Distance

Speed

Fuel consumption

29. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Reduces intake noise

Distributes intake air equally to the cylinders

30. 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

Gravity

None of these

Page 4 of 5

31. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

32. The ease with which petrol vaporizes is called its

Cetane number

Octane number

Oxidation

Volatility

33. Cushioning springs in clutch plate reduces

None of these

Vehicle speed

Jerky starts

Torsional vibrations

34. The valve tappet clearance is measured by

Feeler gauge

Vernier caliper

Engineering scale

Screw pitch gauge

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)

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

P.L.A.N/4

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

110

90

100

120

37. The specific gravity of petrol is about

0.95

1.25

0.75

0.85

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

Tractors

Trucks

Matadors

Passenger cars

39. Odometer is an instrument used for measurement of

Fuel consumption

Power

Distance

Engine r.p.m.

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

175

14

82

65

Page 5 of 5

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

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

Overheating of the engine

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

Ineffectiveness of the brakes

Localized wearing of the brake pads

Rapid wearing of the brake pads

Judder during braking

43. The specific gravity of Diesel is about

0.95

0.65

0.75

0.85

44. The Diesel engine works on

Otto cycle

Diesel cycle

Rankine cycle

Carnot cycle

45. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maximise the fuel economy

Maintain constant engine speed

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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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