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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. Tachometer in a vehicle measures

Engine r.p.m.

Distance

Fuel consumption

Speed

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

Generation of a braking effect at tight corners

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

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

Of the same size as the positive terminal post

None of these

Larger than the positive terminal post

Smaller than the positive terminal post

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

Operates the clutch

Meshes the gears

Selects the synchronizer

Moves the synchronizer

5. The power source for a brake booster is

Electricity

Exhaust manifold pressure

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

Hydraulic pump

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

Partly converts engine power into electric power

Supply electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

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

Rapid wearing of the brake pads

Localized wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

8. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Rear wheels

Front wheels

9. Bead wires are made of

Copper

Aluminium

Zinc

Steel

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

Compensate for wear in the steering linkage

Maintain directional control

Prevent uneven tyre wear

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

Page 2 of 5

11. The Diesel engine works on

Rankine cycle

Carnot cycle

Otto cycle

Diesel cycle

12. The specific gravity of petrol is about

1.25

0.95

0.85

0.75

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

Improved emission

Improved power output

All of these

Improved fuel efficiency

14. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ethylene glycol

Ammonium chloride

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

Tractors

Trucks

Passenger cars

Matadors

16. The effect of having excess camber is

Hard steering

Too much traction

Excessive steering alignment torque

Uneven tyre wear

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

Journal

Small end

Crank arm

Big end

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

100

120

90

110

19. 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

20. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

None of these

Compression ignition (C.I.) engines

Page 3 of 5

21. The function of a governor in automobiles is to

Maximise the fuel economy

Limit the vehicle speed

Limit the power

Maintain constant engine speed

22. 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; each pinion gear meshes with a different side gear.

The differential carrier houses differential pinion gears and side gears.

23. 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

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

10%

15%

5%

20%

25. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

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

65

175

82

14

27. Which of the following oil is more viscous?

SAE 30

SAE 70

SAE 40

SAE 80

28. The brake pedal during ABS operation

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

Is pushed upward forcefully

All of the above

29. The ease with which petrol vaporizes is called its

Volatility

Octane number

Cetane number

Oxidation

30. Engine misfiring is likely to result from

Spark plug gap too wide

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too small

Page 4 of 5

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

1.82

2.81

1.28

1.00

32. 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

2 × P.L.A.N

P.L.A.N

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

Air temperature

Air-fuel ratio

Exhaust gas volume

Air flow speed

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

1-2-4-3

1-3-2-4

1-2-3-4

1-3-4-2

35. Cushioning springs in clutch plate reduces

Jerky starts

Vehicle speed

None of these

Torsional vibrations

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

None of these

Clearance volume

Exhaust volume

Cylinder volume

37. Odometer is an instrument used for measurement of

Fuel consumption

Power

Engine r.p.m.

Distance

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

Rotate the tyres

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Adjust the damper spring tension

39. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Vernier caliper

Engineering scale

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

Gravity

None of these

The pressure created by the oil pump

Splashing action of the crankshaft

Page 5 of 5

41. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

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

Large particles

Small particles

None of these

Sharp edged fragments

43. The specific gravity of Diesel is about

0.65

0.85

0.95

0.75

44. The fuel that detonates easily, is

Alcohol

Iso-octane

Benzene

N-heptane

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

Fouling of spark plug by gasoline

Incomplete valve closure

None of these

Overheating of the engine

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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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