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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 basic purpose of providing caster angle on wheels is to

Compensate for wear in the steering linkage

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

Maintain directional control

Prevent uneven tyre wear

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

1.00

1.28

2.81

1.82

3. Engine misfiring is likely to result from

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too small

Spark plug gap too wide

4. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the power

Maintain constant engine speed

Limit the vehicle speed

5. The main function of intake manifold is that it

Reduces intake noise

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

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

Improved power output

Improved emission

Improved fuel efficiency

All of these

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

100

110

90

120

8. Cushioning springs in clutch plate reduces

None of these

Vehicle speed

Jerky starts

Torsional vibrations

9. The commonly used antifreeze solution in automobiles is

Freon-12

Ethylene glycol

Ammonium chloride

Carbon disulphide

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

Small particles

None of these

Sharp edged fragments

Large particles

Page 2 of 5

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

Air flow speed

Air-fuel ratio

Air temperature

Exhaust gas volume

12. The specific gravity of petrol is about

0.95

0.75

0.85

1.25

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

1-3-4-2

1-3-2-4

1-2-4-3

1-2-3-4

14. The Diesel engine works on

Diesel cycle

Rankine cycle

Carnot cycle

Otto cycle

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

Cylinder volume

Exhaust volume

Clearance volume

None of these

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

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

Supply electric power

Continually recharges the battery

17. 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

Electricity

Hydraulic pump

18. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

None of these

19. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Engineering scale

Vernier caliper

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

82

175

14

65

Page 3 of 5

21. 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

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

Adjust the damper spring tension

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

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

15%

20%

10%

5%

24. 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

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

Head light bulb

Stop light bulb

Parking light bulb

Ignition warning bulb

26. The fuel that detonates easily, is

Iso-octane

N-heptane

Alcohol

Benzene

27. Tachometer in a vehicle measures

Speed

Distance

Engine r.p.m.

Fuel consumption

28. The specific gravity of Diesel is about

0.95

0.65

0.85

0.75

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

Rapid wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

Localized wearing of the brake pads

30. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

Page 4 of 5

31. The ease with which petrol vaporizes is called its

Cetane number

Octane number

Volatility

Oxidation

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

Belt driven by camshaft

Belt driven by drive-shaft

Belt driven by crankshaft

Chain driven by crankshaft

33. Bead wires are made of

Zinc

Copper

Steel

Aluminium

34. 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/2

P.L.A.N

2 × P.L.A.N

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

Operates the clutch

Selects the synchronizer

Meshes the gears

Moves the synchronizer

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

Trucks

Passenger cars

Matadors

Tractors

37. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Distance

Power

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

Gravity

Splashing action of the crankshaft

None of these

The pressure created by the oil pump

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

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

40. 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.

Page 5 of 5

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

Small end

Big end

Crank arm

Journal

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

None of these

Fouling of spark plug by gasoline

Overheating of the engine

Incomplete valve closure

43. The effect of having excess camber is

Too much traction

Uneven tyre wear

Excessive steering alignment torque

Hard steering

44. The parking brake generally acts on

Front and rear wheels

Front wheels

Propeller shaft

Rear wheels

45. Which of the following oil is more viscous?

SAE 70

SAE 40

SAE 30

SAE 80

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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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