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

175

14

82

65

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

Compensate for wear in the steering linkage

Prevent uneven tyre wear

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

Maintain directional control

3. Wheel base of a vehicle is the

Distance between the centres of the rear tyres

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Extreme length of the vehicle

4. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Limit the power

Maintain constant engine speed

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

Exhaust volume

Cylinder volume

Clearance volume

None of these

6. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Freon-12

Carbon disulphide

Ethylene glycol

7. Cushioning springs in clutch plate reduces

None of these

Jerky starts

Vehicle speed

Torsional vibrations

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

Poor recovery of the steering wheel after making a turn

Tendency to assume toe-out orientation

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

9. Which of the following oil is more viscous?

SAE 40

SAE 30

SAE 80

SAE 70

10. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Reduces intake noise

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Page 2 of 5

11. The Diesel engines are also known as

Spark ignition (S.I.) engines

Steam engines

Compression ignition (C.I.) engines

None of these

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

Big end

Crank arm

Journal

Small end

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

None of these

Gravity

The pressure created by the oil pump

Splashing action of the crankshaft

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

1.00

1.82

2.81

1.28

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

Improved emission

All of these

Improved power output

Improved fuel efficiency

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

Chain driven by crankshaft

Belt driven by camshaft

Belt driven by drive-shaft

Belt driven by crankshaft

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

Supply electric power

Partly converts engine power into electric power

Continually recharges the battery

Converts mechanical energy into electrical energy

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

Rotate the tyres

Adjust the tyre pressure

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

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

None of these

Smaller than the positive terminal post

Of the same size as the positive terminal post

Larger than the positive terminal post

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

90

120

100

110

Page 3 of 5

21. 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 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.

22. Bead wires are made of

Steel

Zinc

Copper

Aluminium

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

Exhaust gas volume

Air temperature

Air flow speed

Air-fuel ratio

24. Engine misfiring is likely to result from

Spark plug gap too wide

Spark plug gap too small

Vapours lock in the fuel only

Incorrect fuel air mixture

25. The Diesel engine works on

Otto cycle

Carnot cycle

Rankine cycle

Diesel cycle

26. 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

2 × P.L.A.N

P.L.A.N/2

27. Tachometer in a vehicle measures

Fuel consumption

Speed

Engine r.p.m.

Distance

28. 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

Rapid wearing of the brake pads

Judder during braking

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

Stop light bulb

Head light bulb

Parking light bulb

Ignition warning bulb

30. The effect of having excess camber is

Too much traction

Excessive steering alignment torque

Hard steering

Uneven tyre wear

Page 4 of 5

31. Odometer is an instrument used for measurement of

Power

Engine r.p.m.

Fuel consumption

Distance

32. The brake pedal during ABS operation

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

All of the above

Pedal stroke becomes longer

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

Meshes the gears

Moves the synchronizer

Operates the clutch

Selects the synchronizer

34. The parking brake generally acts on

Front wheels

Front and rear wheels

Rear wheels

Propeller shaft

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

Trucks

Passenger cars

Tractors

Matadors

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

Sharp edged fragments

None of these

Large particles

Small particles

37. The valve tappet clearance is measured by

Vernier caliper

Feeler gauge

Engineering scale

Screw pitch gauge

38. The ease with which petrol vaporizes is called its

Octane number

Cetane number

Volatility

Oxidation

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

1-3-4-2

1-2-3-4

1-3-2-4

1-2-4-3

40. The specific gravity of Diesel is about

0.75

0.65

0.95

0.85

Page 5 of 5

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

Incomplete valve closure

None of these

Fouling of spark plug by gasoline

Overheating of the engine

42. The fuel that detonates easily, is

Alcohol

Iso-octane

N-heptane

Benzene

43. The specific gravity of petrol is about

0.85

0.75

0.95

1.25

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

5%

15%

20%

10%

45. 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

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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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