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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 effect of having excess camber is

Uneven tyre wear

Hard steering

Excessive steering alignment torque

Too much traction

2. 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

3. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

4. The Diesel engine works on

Diesel cycle

Otto cycle

Rankine cycle

Carnot cycle

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

Head light bulb

Ignition warning bulb

Parking light bulb

Stop light bulb

6. Which of the following oil is more viscous?

SAE 40

SAE 30

SAE 70

SAE 80

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

Exhaust gas volume

Air flow speed

Air-fuel ratio

Air temperature

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

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

Rapid wearing of the brake pads

9. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

10. The brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

All of the above

Pedal stroke becomes longer

Page 2 of 5

11. The ease with which petrol vaporizes is called its

Volatility

Cetane number

Octane number

Oxidation

12. 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

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

2.81

1.28

1.00

1.82

14. 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

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

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

The drive shafts are splined to the differential carrier.

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.

16. 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

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Rotate the tyres

Adjust the damper spring tension

18. 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

2 × P.L.A.N

19. The main function of intake manifold is that it

Reduces intake noise

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

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

Large particles

Sharp edged fragments

Small particles

None of these

Page 3 of 5

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

Partly converts engine power into electric power

Supply electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

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

1-3-2-4

1-2-4-3

1-3-4-2

1-2-3-4

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

Improved emission

Improved power output

All of these

Improved fuel efficiency

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

Trucks

Matadors

Tractors

Passenger cars

25. The specific gravity of petrol is about

0.75

0.85

0.95

1.25

26. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Distance

Fuel consumption

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

Compensate for wear in the steering linkage

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

Maintain directional control

Prevent uneven tyre wear

28. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Distance

Fuel consumption

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

Smaller than the positive terminal post

None of these

Larger than the positive terminal post

Of the same size as the positive terminal post

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

110

90

120

100

Page 4 of 5

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

Exhaust volume

Clearance volume

None of these

Cylinder volume

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

Belt driven by camshaft

Belt driven by drive-shaft

Chain driven by crankshaft

Belt driven by crankshaft

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

175

65

14

82

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

Journal

Crank arm

Big end

Small end

35. Bead wires are made of

Copper

Aluminium

Steel

Zinc

36. The function of a governor in automobiles is to

Limit the power

Limit the vehicle speed

Maximise the fuel economy

Maintain constant engine speed

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

5%

15%

20%

10%

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

39. The power source for a brake booster is

Exhaust manifold pressure

Electricity

Hydraulic pump

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

40. The fuel that detonates easily, is

Benzene

Iso-octane

Alcohol

N-heptane

Page 5 of 5

41. Cushioning springs in clutch plate reduces

None of these

Torsional vibrations

Jerky starts

Vehicle speed

42. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Freon-12

Carbon disulphide

43. The parking brake generally acts on

Propeller shaft

Rear wheels

Front and rear wheels

Front wheels

44. The valve tappet clearance is measured by

Screw pitch gauge

Engineering scale

Feeler gauge

Vernier caliper

45. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

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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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