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

20%

15%

5%

10%

2. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Freon-12

Carbon disulphide

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

Operates the clutch

Selects the synchronizer

Moves the synchronizer

Meshes the gears

4. The specific gravity of petrol is about

0.85

0.75

1.25

0.95

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

Air flow speed

Exhaust gas volume

Air temperature

Air-fuel ratio

6. Which of the following oil is more viscous?

SAE 70

SAE 80

SAE 30

SAE 40

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

Generation of a braking effect at tight corners

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

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

Fouling of spark plug by gasoline

Overheating of the engine

Incomplete valve closure

None of these

9. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Reduces intake noise

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

10. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the power

Maximise the fuel economy

Limit the vehicle speed

Page 2 of 5

11. 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

12. 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

13. 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

14. 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

15. The effect of having excess camber is

Hard steering

Excessive steering alignment torque

Too much traction

Uneven tyre wear

16. The specific gravity of Diesel is about

0.95

0.65

0.75

0.85

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

Large particles

Small particles

Sharp edged fragments

None of these

18. Cushioning springs in clutch plate reduces

Jerky starts

Torsional vibrations

Vehicle speed

None of these

19. The Diesel engines are also known as

Steam engines

Spark ignition (S.I.) engines

None of these

Compression ignition (C.I.) engines

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

2.81

1.28

1.00

1.82

Page 3 of 5

21. 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

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

Parking light bulb

Ignition warning bulb

Stop light bulb

Head light bulb

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

Small end

Crank arm

Big end

Journal

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

Supply electric power

Continually recharges the battery

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

25. The Diesel engine works on

Otto cycle

Rankine cycle

Diesel cycle

Carnot cycle

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

65

82

175

14

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

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

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

Improved power output

Improved fuel efficiency

Improved emission

All of these

29. The fuel that detonates easily, is

Alcohol

Benzene

Iso-octane

N-heptane

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

120

100

110

90

Page 4 of 5

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

1-2-4-3

1-3-4-2

1-3-2-4

1-2-3-4

32. Wheel base of a vehicle is the

Extreme length of the vehicle

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

33. Tachometer in a vehicle measures

Fuel consumption

Speed

Engine r.p.m.

Distance

34. 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.

35. 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

P.L.A.N/2

P.L.A.N/4

36. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Fuel consumption

Distance

37. The ease with which petrol vaporizes is called its

Cetane number

Volatility

Oxidation

Octane number

38. The parking brake generally acts on

Propeller shaft

Front wheels

Rear wheels

Front and rear wheels

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

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

40. Engine misfiring is likely to result from

Vapours lock in the fuel only

Spark plug gap too small

Spark plug gap too wide

Incorrect fuel air mixture

Page 5 of 5

41. Bead wires are made of

Copper

Aluminium

Steel

Zinc

42. The valve tappet clearance is measured by

Engineering scale

Vernier caliper

Feeler gauge

Screw pitch gauge

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

Passenger cars

Tractors

Trucks

Matadors

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

None of these

Smaller than the positive terminal post

Larger than the positive terminal post

Of the same size as the positive terminal post

45. The power source for a brake booster is

Exhaust manifold pressure

Electricity

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

Hydraulic pump

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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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