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

Small end

Big end

Crank arm

Journal

2. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the power

Limit the vehicle speed

Maintain constant engine speed

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

Ignition warning bulb

Parking light bulb

Stop light bulb

Head light bulb

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

Operates the clutch

Moves the synchronizer

Meshes the gears

Selects the synchronizer

5. The Diesel engine works on

Carnot cycle

Otto cycle

Diesel cycle

Rankine cycle

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

1-3-4-2

1-2-3-4

1-3-2-4

1-2-4-3

7. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too small

Vapours lock in the fuel only

Spark plug gap too wide

8. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Carbon disulphide

Ethylene glycol

Freon-12

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

2.81

1.28

1.82

1.00

10. The fuel that detonates easily, is

Benzene

N-heptane

Alcohol

Iso-octane

Page 2 of 5

11. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

12. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Too much traction

Hard steering

13. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

14. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Distance

Power

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

Air temperature

Air flow speed

Exhaust gas volume

Air-fuel ratio

16. The Diesel engines are also known as

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

None of these

Steam engines

17. Tachometer in a vehicle measures

Engine r.p.m.

Distance

Speed

Fuel consumption

18. The valve tappet clearance is measured by

Screw pitch gauge

Vernier caliper

Feeler gauge

Engineering scale

19. Cushioning springs in clutch plate reduces

Jerky starts

Vehicle speed

None of these

Torsional vibrations

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

Large particles

Small particles

Sharp edged fragments

None of these

Page 3 of 5

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

Improved emission

All of these

Improved power output

Improved fuel efficiency

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

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

23. Which of the following oil is more viscous?

SAE 30

SAE 70

SAE 40

SAE 80

24. 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

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

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

26. The specific gravity of petrol is about

0.95

0.75

0.85

1.25

27. 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.

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

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

15%

20%

10%

5%

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

90

110

120

100

30. Bead wires are made of

Steel

Aluminium

Zinc

Copper

Page 4 of 5

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

Incomplete valve closure

Fouling of spark plug by gasoline

Overheating of the engine

None of these

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

14

82

175

65

33. The specific gravity of Diesel is about

0.65

0.95

0.75

0.85

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

The pressure created by the oil pump

None of these

Gravity

Splashing action of the crankshaft

35. 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

36. 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

2 × P.L.A.N

P.L.A.N/4

P.L.A.N

37. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

Extreme length of the vehicle

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

Rotate the tyres

Adjust the tyre pressure

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

39. The parking brake generally acts on

Front and rear wheels

Rear wheels

Front wheels

Propeller shaft

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

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

Rapid wearing of the brake pads

Page 5 of 5

41. 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

42. The power source for a brake booster is

Hydraulic pump

Exhaust manifold pressure

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

Electricity

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

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Belt driven by crankshaft

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

Matadors

Passenger cars

Tractors

Trucks

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

Maintain directional control

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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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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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