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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 advantage of the fuel injection system over the carburettor system is

All of these

Improved power output

Improved fuel efficiency

Improved emission

2. The fuel that detonates easily, is

Iso-octane

N-heptane

Alcohol

Benzene

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

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

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

Clearance volume

Cylinder volume

Exhaust volume

None of these

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

Crank arm

Small end

Big end

Journal

6. The Diesel engine works on

Diesel cycle

Carnot cycle

Rankine cycle

Otto cycle

7. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Reduces intake noise

Promotes the mixture of air and fuel

8. The Diesel engines are also known as

Steam engines

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

9. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

None of these

Vehicle speed

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

Stop light bulb

Ignition warning bulb

Head light bulb

Parking light bulb

Page 2 of 5

11. The specific gravity of petrol is about

0.95

0.75

1.25

0.85

12. Wheel base of a vehicle is the

Extreme length of the vehicle

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

13. 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

14. The parking brake generally acts on

Front and rear wheels

Front wheels

Propeller shaft

Rear wheels

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Adjust the tyre pressure

Rotate the tyres

16. Engine misfiring is likely to result from

Spark plug gap too wide

Spark plug gap too small

Incorrect fuel air mixture

Vapours lock in the fuel only

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

Gravity

Splashing action of the crankshaft

The pressure created by the oil pump

None of these

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

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

Of the same size as the positive terminal post

19. 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

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

1-2-3-4

1-2-4-3

1-3-4-2

1-3-2-4

Page 3 of 5

21. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Distance

Fuel consumption

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

14

175

65

82

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

90

100

120

110

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

Prevent uneven tyre wear

Maintain directional control

Compensate for wear in the steering linkage

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

25. Which of the following oil is more viscous?

SAE 40

SAE 80

SAE 70

SAE 30

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

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

Overheating of the engine

27. The brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

All of the above

28. The power source for a brake booster is

Electricity

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

Hydraulic pump

Exhaust manifold pressure

29. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

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

Air-fuel ratio

Exhaust gas volume

Air flow speed

Air temperature

Page 4 of 5

31. The specific gravity of Diesel is about

0.95

0.65

0.85

0.75

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

Trucks

Passenger cars

Matadors

Tractors

33. The effect of having excess camber is

Too much traction

Uneven tyre wear

Hard steering

Excessive steering alignment torque

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

20%

5%

10%

15%

35. 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

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

The drive shafts are splined to the differential carrier.

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

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.

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

Small particles

Large particles

Sharp edged fragments

None of these

38. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the vehicle speed

Limit the power

Maintain constant engine speed

39. The valve tappet clearance is measured by

Feeler gauge

Engineering scale

Screw pitch gauge

Vernier caliper

40. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Ethylene glycol

Freon-12

Carbon disulphide

Page 5 of 5

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

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

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

1.82

1.00

2.81

1.28

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

Rapid wearing of the brake pads

Judder during braking

Localized wearing of the brake pads

Ineffectiveness of the brakes

44. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

45. Bead wires are made of

Aluminium

Steel

Zinc

Copper

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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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