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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 power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

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

Electricity

2. Bead wires are made of

Aluminium

Zinc

Copper

Steel

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

Improved fuel efficiency

Improved power output

All of these

Improved emission

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

14

65

82

175

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

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

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

Large particles

None of these

Sharp edged fragments

Small particles

7. The effect of having excess camber is

Too much traction

Uneven tyre wear

Excessive steering alignment torque

Hard steering

8. Tachometer in a vehicle measures

Distance

Engine r.p.m.

Speed

Fuel consumption

9. The parking brake generally acts on

Propeller shaft

Front wheels

Front and rear wheels

Rear wheels

10. Odometer is an instrument used for measurement of

Fuel consumption

Power

Distance

Engine r.p.m.

Page 2 of 5

11. The specific gravity of Diesel is about

0.75

0.65

0.85

0.95

12. 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

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

Head light bulb

Ignition warning bulb

Stop light bulb

Parking light bulb

14. The valve tappet clearance is measured by

Vernier caliper

Screw pitch gauge

Engineering scale

Feeler gauge

15. Cushioning springs in clutch plate reduces

Vehicle speed

Jerky starts

Torsional vibrations

None of these

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

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

Supply electric power

17. Which of the following oil is more viscous?

SAE 70

SAE 80

SAE 40

SAE 30

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

Cylinder volume

None of these

Exhaust volume

Clearance volume

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

20%

10%

15%

5%

20. 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

Page 3 of 5

21. The ease with which petrol vaporizes is called its

Oxidation

Cetane number

Volatility

Octane number

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

1.28

1.82

2.81

1.00

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

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Rotate the tyres

24. The specific gravity of petrol is about

0.85

0.75

0.95

1.25

25. 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

P.L.A.N/4

P.L.A.N/2

2 × P.L.A.N

26. 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 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.

27. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Freon-12

Carbon disulphide

28. 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

29. The function of a governor in automobiles is to

Limit the power

Maximise the fuel economy

Maintain constant engine speed

Limit the vehicle speed

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

Air flow speed

Air-fuel ratio

Exhaust gas volume

Air temperature

Page 4 of 5

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

Of the same size as the positive terminal post

Smaller than the positive terminal post

None of these

Larger than the positive terminal post

32. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Reduces intake noise

Distributes intake air equally to the cylinders

33. 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

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

120

90

110

100

35. The Diesel engine works on

Diesel cycle

Rankine cycle

Otto cycle

Carnot cycle

36. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

37. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Extreme length of the vehicle

Distance between the centres of the front and rear wheels

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

Matadors

Tractors

Trucks

Passenger cars

39. The fuel that detonates easily, is

N-heptane

Alcohol

Benzene

Iso-octane

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

Splashing action of the crankshaft

Gravity

None of these

The pressure created by the oil pump

Page 5 of 5

41. 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

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

Big end

Small end

Journal

Crank arm

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

Belt driven by camshaft

Belt driven by crankshaft

Belt driven by drive-shaft

Chain driven by crankshaft

44. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

45. 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

Prevent uneven tyre wear

Maintain directional control

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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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