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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 brake pedal during ABS operation

Pedal stroke becomes longer

Is pushed upward forcefully

All of the above

Transmits slight kickback to the driver's foot

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

None of these

Small particles

Sharp edged fragments

Large particles

3. 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

4. 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

5. Tachometer in a vehicle measures

Fuel consumption

Speed

Distance

Engine r.p.m.

6. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Hard steering

Too much traction

7. The specific gravity of Diesel is about

0.65

0.95

0.75

0.85

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

Incomplete valve closure

None of these

Overheating of the engine

Fouling of spark plug by gasoline

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

Converts mechanical energy into electrical energy

Continually recharges the battery

Partly converts engine power into electric power

Supply electric power

10. 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

Page 2 of 5

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

1-3-4-2

1-3-2-4

1-2-3-4

1-2-4-3

12. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Reduces intake noise

Distributes intake air equally to the cylinders

Cools the intake air to a suitable temperature

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

Moves the synchronizer

Selects the synchronizer

Operates the clutch

Meshes the gears

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

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

15. The fuel that detonates easily, is

Iso-octane

Benzene

Alcohol

N-heptane

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

Journal

Crank arm

Small end

Big end

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

Ineffectiveness of the brakes

Localized wearing of the brake pads

Judder during braking

Rapid wearing of the brake pads

18. 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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

19. Which of the following oil is more viscous?

SAE 30

SAE 40

SAE 80

SAE 70

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

Tractors

Trucks

Matadors

Passenger cars

Page 3 of 5

21. Odometer is an instrument used for measurement of

Engine r.p.m.

Distance

Fuel consumption

Power

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

Head light bulb

Ignition warning bulb

Parking light bulb

Stop light bulb

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

1.82

1.28

1.00

2.81

24. The specific gravity of petrol is about

0.85

1.25

0.75

0.95

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

65

175

14

82

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

110

120

100

90

27. The parking brake generally acts on

Rear wheels

Front and rear wheels

Propeller shaft

Front wheels

28. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Vehicle speed

Jerky starts

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

All of these

Improved power output

Improved fuel efficiency

Improved emission

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

Belt driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Chain driven by crankshaft

Page 4 of 5

31. The Diesel engine works on

Diesel cycle

Rankine cycle

Otto cycle

Carnot cycle

32. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

33. The Diesel engines are also known as

Steam engines

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

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

Cylinder volume

Exhaust volume

None of these

Clearance volume

35. 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

36. Bead wires are made of

Aluminium

Steel

Copper

Zinc

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

The drive shafts are splined to the differential carrier.

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

Rotate the tyres

Adjust the tyre pressure

39. 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

2 × P.L.A.N

P.L.A.N

P.L.A.N/2

40. The function of a governor in automobiles is to

Limit the vehicle speed

Maintain constant engine speed

Limit the power

Maximise the fuel economy

Page 5 of 5

41. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the rear tyres

Extreme length of the vehicle

Distance between the centres of the front tyres

42. The valve tappet clearance is measured by

Feeler gauge

Screw pitch gauge

Vernier caliper

Engineering scale

43. The power source for a brake booster is

Hydraulic pump

Electricity

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

Exhaust manifold pressure

44. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Freon-12

Ammonium chloride

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

5%

20%

15%

10%

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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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