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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. 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

2. The Diesel engine works on

Rankine cycle

Carnot cycle

Diesel cycle

Otto cycle

3. Which of the following oil is more viscous?

SAE 70

SAE 40

SAE 80

SAE 30

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

Adjust the damper spring tension

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

5. 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.

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.

6. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

Cools the intake air to a suitable temperature

7. The power source for a brake booster is

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

Exhaust manifold pressure

Hydraulic pump

Electricity

8. 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 drive-shaft

Belt driven by crankshaft

9. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Ammonium chloride

Carbon disulphide

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

None of these

Gravity

Splashing action of the crankshaft

The pressure created by the oil pump

Page 2 of 5

11. The valve tappet clearance is measured by

Vernier caliper

Engineering scale

Feeler gauge

Screw pitch gauge

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

None of these

Exhaust volume

Clearance volume

Cylinder volume

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

None of these

Large particles

Sharp edged fragments

Small particles

14. 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

Smaller than the positive terminal post

None of these

15. 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

Judder during braking

Rapid wearing of the brake pads

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

Head light bulb

Stop light bulb

Ignition warning bulb

Parking light bulb

17. Engine misfiring is likely to result from

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too small

Spark plug gap too wide

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

Moves the synchronizer

Operates the clutch

Meshes the gears

Selects the synchronizer

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

110

120

100

90

20. Bead wires are made of

Zinc

Aluminium

Steel

Copper

Page 3 of 5

21. Cushioning springs in clutch plate reduces

Vehicle speed

Torsional vibrations

Jerky starts

None of these

22. 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

P.L.A.N/4

P.L.A.N/2

23. The specific gravity of Diesel is about

0.85

0.75

0.95

0.65

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

Prevent uneven tyre wear

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

Maintain directional control

Compensate for wear in the steering linkage

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

Incomplete valve closure

Overheating of the engine

Fouling of spark plug by gasoline

None of these

26. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

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

5%

20%

15%

10%

28. The specific gravity of petrol is about

0.85

0.95

1.25

0.75

29. Odometer is an instrument used for measurement of

Distance

Power

Engine r.p.m.

Fuel consumption

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

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

Generation of a braking effect at tight corners

Page 4 of 5

31. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

32. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

None of these

Spark ignition (S.I.) engines

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

All of these

Improved power output

Improved emission

Improved fuel efficiency

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

Small end

Crank arm

Big end

Journal

35. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Hard steering

Too much traction

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

Air flow speed

Air temperature

Exhaust gas volume

Air-fuel ratio

37. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Front wheels

Rear wheels

38. The function of a governor in automobiles is to

Limit the vehicle speed

Limit the power

Maintain constant engine speed

Maximise the fuel economy

39. The fuel that detonates easily, is

Iso-octane

Benzene

N-heptane

Alcohol

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

Matadors

Passenger cars

Tractors

Trucks

Page 5 of 5

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

175

65

14

82

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

1-2-4-3

1-3-4-2

1-3-2-4

1-2-3-4

43. The ease with which petrol vaporizes is called its

Volatility

Oxidation

Octane number

Cetane number

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

1.82

2.81

1.00

1.28

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

Continually recharges the battery

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Supply electric power

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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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