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

Operates the clutch

Moves the synchronizer

Meshes the gears

Selects the synchronizer

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

1.00

1.82

2.81

1.28

3. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

None of these

Spark ignition (S.I.) engines

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

Tractors

Trucks

Matadors

Passenger cars

5. The parking brake generally acts on

Propeller shaft

Front wheels

Front and rear wheels

Rear wheels

6. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 70

SAE 30

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

Stop light bulb

Head light bulb

Parking light bulb

Ignition warning bulb

8. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

9. 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

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

Journal

Small end

Crank arm

Big end

Page 2 of 5

11. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

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

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

Gravity

13. 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

14. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Freon-12

Ethylene glycol

Ammonium chloride

15. The Diesel engine works on

Carnot cycle

Rankine cycle

Diesel cycle

Otto cycle

16. Bead wires are made of

Zinc

Steel

Copper

Aluminium

17. The effect of having excess camber is

Too much traction

Hard steering

Uneven tyre wear

Excessive steering alignment torque

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

10%

20%

15%

5%

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

None of these

Cylinder volume

Exhaust volume

Clearance volume

20. 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 differential carrier houses differential pinion gears and side gears.

The drive shafts are splined to the differential carrier.

The left side gear and the differential carrier rotate in constant unison.

Page 3 of 5

21. 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

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

1-3-4-2

1-3-2-4

1-2-4-3

1-2-3-4

23. 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

Judder during braking

Localized wearing of the brake pads

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

Improved fuel efficiency

All of these

Improved emission

Improved power output

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

None of these

Small particles

Large particles

Sharp edged fragments

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

Adjust the damper spring tension

Adjust the tyre pressure

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

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

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

28. 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

2 × P.L.A.N

P.L.A.N/2

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

Supply electric power

Continually recharges the battery

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

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

Compensate for wear in the steering linkage

Maintain directional control

Prevent uneven tyre wear

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

Page 4 of 5

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

120

110

90

100

32. The specific gravity of Diesel is about

0.65

0.95

0.75

0.85

33. Tachometer in a vehicle measures

Distance

Fuel consumption

Engine r.p.m.

Speed

34. The power source for a brake booster is

Hydraulic pump

Electricity

Exhaust manifold pressure

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

35. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Power

Distance

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

Belt driven by camshaft

Belt driven by crankshaft

Belt driven by drive-shaft

Chain driven by crankshaft

37. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Reduces intake noise

38. The ease with which petrol vaporizes is called its

Octane number

Volatility

Oxidation

Cetane number

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

82

65

14

175

40. The valve tappet clearance is measured by

Screw pitch gauge

Vernier caliper

Feeler gauge

Engineering scale

Page 5 of 5

41. The fuel that detonates easily, is

Benzene

N-heptane

Iso-octane

Alcohol

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

Fouling of spark plug by gasoline

None of these

Incomplete valve closure

Overheating of the engine

43. Cushioning springs in clutch plate reduces

None of these

Vehicle speed

Jerky starts

Torsional vibrations

44. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Maximise the fuel economy

Limit the vehicle speed

45. The specific gravity of petrol is about

0.85

1.25

0.95

0.75

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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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