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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

Too much traction

Excessive steering alignment torque

Uneven tyre wear

Hard steering

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

Of the same size as the positive terminal post

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

3. Tachometer in a vehicle measures

Speed

Fuel consumption

Distance

Engine r.p.m.

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

1.28

1.82

1.00

2.81

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

Localized wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Rapid wearing of the brake pads

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

The differential carrier houses differential pinion gears and side gears.

The drive shafts are splined to the differential carrier.

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

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

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

Exhaust volume

Cylinder volume

None of these

Clearance volume

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

90

100

110

120

10. 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 2 of 5

11. The specific gravity of petrol is about

0.95

0.85

0.75

1.25

12. Which of the following oil is more viscous?

SAE 70

SAE 80

SAE 30

SAE 40

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

Crank arm

Small end

Big end

Journal

14. 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/4

P.L.A.N

2 × P.L.A.N

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

The pressure created by the oil pump

Splashing action of the crankshaft

Gravity

None of these

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

1-2-4-3

1-3-4-2

1-2-3-4

1-3-2-4

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

15%

5%

20%

10%

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

Moves the synchronizer

Selects the synchronizer

Operates the clutch

Meshes the gears

19. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

None of these

Spark ignition (S.I.) engines

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

Air-fuel ratio

Air flow speed

Air temperature

Exhaust gas volume

Page 3 of 5

21. The Diesel engine works on

Diesel cycle

Carnot cycle

Otto cycle

Rankine cycle

22. The valve tappet clearance is measured by

Feeler gauge

Engineering scale

Screw pitch gauge

Vernier caliper

23. The specific gravity of Diesel is about

0.65

0.85

0.75

0.95

24. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

Limit the power

25. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

Pedal stroke becomes longer

26. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Power

Distance

27. 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

28. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Vehicle speed

Jerky starts

29. 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

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

Tractors

Passenger cars

Trucks

Matadors

Page 4 of 5

31. 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

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

Converts mechanical energy into electrical energy

Supply electric power

Continually recharges the battery

Partly converts engine power into electric power

33. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Freon-12

Carbon disulphide

Ammonium chloride

34. The ease with which petrol vaporizes is called its

Volatility

Octane number

Cetane number

Oxidation

35. Engine misfiring is likely to result from

Spark plug gap too small

Spark plug gap too wide

Incorrect fuel air mixture

Vapours lock in the fuel only

36. The parking brake generally acts on

Rear wheels

Propeller shaft

Front and rear wheels

Front wheels

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

Improved fuel efficiency

Improved emission

All of these

Improved power output

38. Bead wires are made of

Zinc

Aluminium

Steel

Copper

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

Large particles

Small particles

None of these

Sharp edged fragments

40. The fuel that detonates easily, is

Benzene

N-heptane

Iso-octane

Alcohol

Page 5 of 5

41. 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

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

Chain driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

Belt driven by crankshaft

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

Ignition warning bulb

Head light bulb

Parking light bulb

Stop light bulb

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

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Adjust the damper spring tension

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

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

Maintain directional control

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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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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