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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 commonly used antifreeze solution in automobiles is

Ammonium chloride

Ethylene glycol

Freon-12

Carbon disulphide

2. 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

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

2.81

1.82

1.00

1.28

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

The pressure created by the oil pump

None of these

Gravity

Splashing action of the crankshaft

5. The function of a governor in automobiles is to

Limit the vehicle speed

Maintain constant engine speed

Maximise the fuel economy

Limit the power

6. The brake pedal during ABS operation

Pedal stroke becomes longer

All of the above

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

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

Judder during braking

Localized wearing of the brake pads

Rapid wearing of the brake pads

Ineffectiveness of the brakes

8. 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

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

None of these

Fouling of spark plug by gasoline

Incomplete valve closure

Overheating of the engine

10. The main function of intake manifold is that it

Reduces intake noise

Cools the intake air to a suitable temperature

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Page 2 of 5

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

Tractors

Trucks

Passenger cars

Matadors

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

14

82

65

175

13. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Distance

Fuel consumption

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

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Poor recovery of the steering wheel after making a turn

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

Belt driven by camshaft

Belt driven by crankshaft

Chain driven by crankshaft

Belt driven by drive-shaft

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

90

110

100

120

17. 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

18. The ease with which petrol vaporizes is called its

Cetane number

Oxidation

Octane number

Volatility

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

1-3-4-2

1-2-4-3

1-2-3-4

1-3-2-4

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

Small end

Big end

Crank arm

Journal

Page 3 of 5

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

Parking light bulb

Ignition warning bulb

Head light bulb

Stop light bulb

22. The Diesel engine works on

Otto cycle

Diesel cycle

Rankine cycle

Carnot cycle

23. The valve tappet clearance is measured by

Feeler gauge

Vernier caliper

Screw pitch gauge

Engineering scale

24. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Jerky starts

Vehicle speed

25. The parking brake generally acts on

Front and rear wheels

Propeller shaft

Front wheels

Rear wheels

26. The specific gravity of petrol is about

0.95

0.85

1.25

0.75

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

Improved power output

Improved fuel efficiency

Improved emission

All of these

28. Engine misfiring is likely to result from

Spark plug gap too wide

Spark plug gap too small

Incorrect fuel air mixture

Vapours lock in the fuel only

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

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Supply electric power

Continually recharges the battery

30. 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

Distance between the centres of the front tyres

Extreme length of the vehicle

Page 4 of 5

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

Sharp edged fragments

Small particles

None of these

Large particles

32. Tachometer in a vehicle measures

Distance

Fuel consumption

Speed

Engine r.p.m.

33. The specific gravity of Diesel is about

0.85

0.95

0.65

0.75

34. 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

35. Bead wires are made of

Aluminium

Steel

Copper

Zinc

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

Of the same size as the positive terminal post

Larger than the positive terminal post

Smaller than the positive terminal post

None of these

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

10%

5%

15%

20%

38. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

39. 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

40. The effect of having excess camber is

Hard steering

Uneven tyre wear

Excessive steering alignment torque

Too much traction

Page 5 of 5

41. Which of the following oil is more viscous?

SAE 80

SAE 30

SAE 70

SAE 40

42. 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/2

2 × P.L.A.N

P.L.A.N/4

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

Clearance volume

None of these

Cylinder volume

Exhaust volume

44. 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 drive shafts are splined to the differential carrier.

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

The differential carrier houses differential pinion gears and side gears; each pinion gear meshes with a different side gear.

45. The fuel that detonates easily, is

Alcohol

Iso-octane

N-heptane

Benzene

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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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