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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. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the rear tyres

Distance between the centres of the front tyres

Distance between the centres of the front and rear wheels

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

5%

10%

20%

15%

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

14

65

82

175

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

Maintain directional control

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

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

1-3-2-4

1-2-3-4

1-2-4-3

1-3-4-2

6. The fuel that detonates easily, is

Iso-octane

Benzene

N-heptane

Alcohol

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

Generation of a braking effect at tight corners

The vehicle to pull to the side of lesser inclination

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

Parking light bulb

Head light bulb

Ignition warning bulb

Stop light bulb

9. 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

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

Big end

Small end

Crank arm

Journal

Page 2 of 5

11. Cushioning springs in clutch plate reduces

Jerky starts

None of these

Torsional vibrations

Vehicle speed

12. The commonly used antifreeze solution in automobiles is

Carbon disulphide

Ethylene glycol

Ammonium chloride

Freon-12

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

None of these

The pressure created by the oil pump

Gravity

Splashing action of the crankshaft

14. The Diesel engine works on

Rankine cycle

Diesel cycle

Carnot cycle

Otto cycle

15. The brake pedal during ABS operation

All of the above

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

Is pushed upward forcefully

16. The Diesel engines are also known as

Steam engines

Compression ignition (C.I.) engines

None of these

Spark ignition (S.I.) engines

17. The effect of having excess camber is

Too much traction

Hard steering

Excessive steering alignment torque

Uneven tyre wear

18. Tachometer in a vehicle measures

Fuel consumption

Distance

Engine r.p.m.

Speed

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

Fouling of spark plug by gasoline

Overheating of the engine

None of these

Incomplete valve closure

20. The main function of intake manifold is that it

Promotes the mixture of air and fuel

Cools the intake air to a suitable temperature

Reduces intake noise

Distributes intake air equally to the cylinders

Page 3 of 5

21. The parking brake generally acts on

Front wheels

Rear wheels

Front and rear wheels

Propeller shaft

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

120

90

100

110

23. Engine misfiring is likely to result from

Spark plug gap too wide

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too small

24. Which of the following oil is more viscous?

SAE 70

SAE 80

SAE 40

SAE 30

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

Clearance volume

Cylinder volume

Exhaust volume

None of these

26. The ease with which petrol vaporizes is called its

Octane number

Cetane number

Oxidation

Volatility

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

Exhaust gas volume

Air temperature

Air-fuel ratio

Air flow speed

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

Sharp edged fragments

Large particles

Small particles

None of these

29. 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)

2 × P.L.A.N

P.L.A.N/2

P.L.A.N

P.L.A.N/4

30. The power source for a brake booster is

Electricity

Hydraulic pump

Exhaust manifold pressure

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

Page 4 of 5

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

Adjust the damper spring tension

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Rotate the tyres

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

Partly converts engine power into electric power

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

33. The specific gravity of petrol is about

0.85

0.75

0.95

1.25

34. Bead wires are made of

Aluminium

Steel

Copper

Zinc

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

1.00

2.81

1.82

1.28

36. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Screw pitch gauge

Feeler gauge

37. The function of a governor in automobiles is to

Limit the vehicle speed

Maintain constant engine speed

Maximise the fuel economy

Limit the power

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

Meshes the gears

Selects the synchronizer

Moves the synchronizer

Operates the clutch

39. Odometer is an instrument used for measurement of

Distance

Engine r.p.m.

Power

Fuel consumption

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; 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.

The differential carrier houses differential pinion gears and side gears.

Page 5 of 5

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

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

None of these

42. 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

43. The specific gravity of Diesel is about

0.65

0.85

0.95

0.75

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

Improved emission

All of these

Improved fuel efficiency

Improved power output

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

Passenger cars

Matadors

Trucks

Tractors

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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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