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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. 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

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

Belt driven by crankshaft

Belt driven by camshaft

Chain driven by crankshaft

Belt driven by drive-shaft

3. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Power

Engine r.p.m.

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

All of these

Improved emission

Improved fuel efficiency

Improved power output

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

Small end

Journal

Crank arm

Big end

6. 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

7. Tachometer in a vehicle measures

Speed

Distance

Fuel consumption

Engine r.p.m.

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Rotate the tyres

Adjust the tyre pressure

9. The Diesel engine works on

Carnot cycle

Otto cycle

Rankine cycle

Diesel cycle

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

Stop light bulb

Head light bulb

Ignition warning bulb

Parking light bulb

Page 2 of 5

11. The parking brake generally acts on

Front and rear wheels

Propeller shaft

Front wheels

Rear wheels

12. The Diesel engines are also known as

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

None of these

Steam engines

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

Small particles

Sharp edged fragments

Large particles

None of these

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

Air temperature

Air flow speed

Air-fuel ratio

Exhaust gas volume

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

Localized wearing of the brake pads

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Judder during braking

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

Selects the synchronizer

Operates the clutch

Meshes the gears

Moves the synchronizer

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

120

110

90

100

18. The specific gravity of petrol is about

0.85

0.95

1.25

0.75

19. 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

20. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too small

Spark plug gap too wide

Vapours lock in the fuel only

Page 3 of 5

21. The valve tappet clearance is measured by

Engineering scale

Screw pitch gauge

Vernier caliper

Feeler gauge

22. The specific gravity of Diesel is about

0.85

0.65

0.95

0.75

23. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Reduces intake noise

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

24. Cushioning springs in clutch plate reduces

Jerky starts

None of these

Vehicle speed

Torsional vibrations

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

Overheating of the engine

Incomplete valve closure

None of these

Fouling of spark plug by gasoline

26. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Freon-12

Ethylene glycol

Carbon disulphide

27. The power source for a brake booster is

Hydraulic pump

Electricity

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

Exhaust manifold pressure

28. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the vehicle speed

Limit the power

Maintain constant engine speed

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

1.82

1.00

1.28

2.81

30. 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

Prevent uneven tyre wear

Maintain directional control

Page 4 of 5

31. 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 drive shafts are splined to the differential carrier.

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

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

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

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

Splashing action of the crankshaft

The pressure created by the oil pump

None of these

Gravity

34. 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 front tyres

Distance between the centres of the rear tyres

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

Smaller than the positive terminal post

Of the same size as the positive terminal post

None of these

Larger than the positive terminal post

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

175

82

14

65

37. 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

P.L.A.N/4

P.L.A.N/2

38. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

All of the above

Is pushed upward forcefully

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

Trucks

Matadors

Passenger cars

Tractors

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

15%

20%

5%

10%

Page 5 of 5

41. Which of the following oil is more viscous?

SAE 80

SAE 40

SAE 30

SAE 70

42. Bead wires are made of

Aluminium

Steel

Copper

Zinc

43. The ease with which petrol vaporizes is called its

Cetane number

Volatility

Oxidation

Octane number

44. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Uneven tyre wear

Hard steering

45. The fuel that detonates easily, is

Alcohol

Benzene

Iso-octane

N-heptane

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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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