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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 front tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

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

None of these

Splashing action of the crankshaft

The pressure created by the oil pump

Gravity

3. The brake pedal during ABS operation

All of the above

Pedal stroke becomes longer

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

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

None of these

Clearance volume

Exhaust volume

Cylinder volume

5. The power source for a brake booster is

Exhaust manifold pressure

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

Hydraulic pump

Electricity

6. 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

7. The Diesel engine works on

Otto cycle

Diesel cycle

Rankine cycle

Carnot cycle

8. Bead wires are made of

Zinc

Copper

Aluminium

Steel

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

1.28

1.82

2.81

1.00

10. Tachometer in a vehicle measures

Engine r.p.m.

Fuel consumption

Distance

Speed

Page 2 of 5

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

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

Supply electric power

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

Improved emission

All of these

Improved fuel efficiency

Improved power output

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

100

120

90

110

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

Larger than the positive terminal post

None of these

Smaller than the positive terminal post

Of the same size as the positive terminal post

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

Meshes the gears

Operates the clutch

Selects the synchronizer

Moves the synchronizer

16. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Engineering scale

Vernier caliper

17. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Too much traction

Uneven tyre wear

18. 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

19. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

20. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

Page 3 of 5

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

Air flow speed

Exhaust gas volume

Air temperature

Air-fuel ratio

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

20%

10%

15%

5%

23. The Diesel engines are also known as

None of these

Steam engines

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

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

Crank arm

Journal

Big end

Small end

25. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Freon-12

Ethylene glycol

Ammonium chloride

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

Overheating of the engine

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

27. Cushioning springs in clutch plate reduces

None of these

Jerky starts

Vehicle speed

Torsional vibrations

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)

2 × P.L.A.N

P.L.A.N/4

P.L.A.N/2

P.L.A.N

29. The specific gravity of Diesel is about

0.85

0.95

0.65

0.75

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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Page 4 of 5

31. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too wide

Incorrect fuel air mixture

Spark plug gap too small

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

Parking light bulb

Head light bulb

Ignition warning bulb

Stop light bulb

33. 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

34. Odometer is an instrument used for measurement of

Fuel consumption

Power

Distance

Engine r.p.m.

35. Which of the following oil is more viscous?

SAE 30

SAE 70

SAE 80

SAE 40

36. The specific gravity of petrol is about

0.85

0.95

0.75

1.25

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

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

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

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

Compensate for wear in the steering linkage

Maintain directional control

Prevent uneven tyre wear

39. The parking brake generally acts on

Front and rear wheels

Propeller shaft

Front wheels

Rear wheels

40. 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

Page 5 of 5

41. The fuel that detonates easily, is

N-heptane

Alcohol

Iso-octane

Benzene

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

82

175

65

14

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

Matadors

Trucks

Tractors

Passenger cars

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

None of these

Large particles

Sharp edged fragments

Small particles

45. 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.

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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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