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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 ease with which petrol vaporizes is called its

Volatility

Oxidation

Octane number

Cetane number

2. 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

3. Which of the following oil is more viscous?

SAE 40

SAE 30

SAE 80

SAE 70

4. 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/4

P.L.A.N

P.L.A.N/2

2 × P.L.A.N

5. The Diesel engine works on

Otto cycle

Rankine cycle

Diesel cycle

Carnot cycle

6. Tachometer in a vehicle measures

Distance

Fuel consumption

Speed

Engine r.p.m.

7. Cushioning springs in clutch plate reduces

Jerky starts

None of these

Vehicle speed

Torsional vibrations

8. The fuel that detonates easily, is

N-heptane

Iso-octane

Alcohol

Benzene

9. 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.

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

Moves the synchronizer

Operates the clutch

Selects the synchronizer

Meshes the gears

Page 2 of 5

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

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

None of these

12. 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

13. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Freon-12

Carbon disulphide

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

Head light bulb

Stop light bulb

Ignition warning bulb

Parking light bulb

15. 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

16. Odometer is an instrument used for measurement of

Engine r.p.m.

Power

Distance

Fuel consumption

17. 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

Judder during braking

Rapid wearing of the brake pads

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

Sharp edged fragments

Large particles

Small particles

None of these

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

Improved power output

All of these

Improved fuel efficiency

Improved emission

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

5%

10%

15%

20%

Page 3 of 5

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

Larger than the positive terminal post

None of these

Smaller than the positive terminal post

Of the same size as the positive terminal post

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

1-2-3-4

1-3-2-4

1-2-4-3

1-3-4-2

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

1.28

1.00

2.81

1.82

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

Big end

Small end

Crank arm

Journal

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

Continually recharges the battery

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Supply electric power

26. The power source for a brake booster is

Exhaust manifold pressure

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

Hydraulic pump

Electricity

27. Bead wires are made of

Zinc

Steel

Copper

Aluminium

28. 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

29. 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

30. The function of a governor in automobiles is to

Limit the power

Maintain constant engine speed

Limit the vehicle speed

Maximise the fuel economy

Page 4 of 5

31. The Diesel engines are also known as

Compression ignition (C.I.) engines

Steam engines

Spark ignition (S.I.) engines

None of these

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

Cylinder volume

Clearance volume

Exhaust volume

None of these

33. The main function of intake manifold is that it

Reduces intake noise

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

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

65

14

82

175

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

90

110

100

120

36. The specific gravity of Diesel is about

0.85

0.65

0.95

0.75

37. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Hard steering

Too much traction

38. The specific gravity of petrol is about

0.95

0.85

1.25

0.75

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

Gravity

The pressure created by the oil pump

Splashing action of the crankshaft

None of these

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

Matadors

Tractors

Passenger cars

Trucks

Page 5 of 5

41. The parking brake generally acts on

Front wheels

Propeller shaft

Front and rear wheels

Rear wheels

42. 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

43. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Screw pitch gauge

Feeler gauge

44. 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

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

Air-fuel ratio

Exhaust gas volume

Air temperature

Air flow speed

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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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