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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 function of a governor in automobiles is to

Maximise the fuel economy

Limit the vehicle speed

Maintain constant engine speed

Limit the power

2. 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

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

1.28

1.00

2.81

1.82

4. 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

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

Gravity

Splashing action of the crankshaft

The pressure created by the oil pump

None of these

6. The ease with which petrol vaporizes is called its

Octane number

Volatility

Oxidation

Cetane number

7. The valve tappet clearance is measured by

Feeler gauge

Engineering scale

Screw pitch gauge

Vernier caliper

8. The fuel that detonates easily, is

N-heptane

Benzene

Iso-octane

Alcohol

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

Small particles

Sharp edged fragments

None of these

Large particles

10. The brake pedal during ABS operation

Pedal stroke becomes longer

Transmits slight kickback to the driver's foot

Is pushed upward forcefully

All of the above

Page 2 of 5

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

Air flow speed

Air temperature

Air-fuel ratio

Exhaust gas volume

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

Ineffectiveness of the brakes

Judder during braking

Localized wearing of the brake pads

Rapid wearing of the brake pads

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

Journal

Big end

Small end

Crank arm

14. Engine misfiring is likely to result from

Vapours lock in the fuel only

Incorrect fuel air mixture

Spark plug gap too wide

Spark plug gap too small

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

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

Continually recharges the battery

Supply electric power

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

None of these

Cylinder volume

Exhaust volume

Clearance volume

17. 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 drive-shaft

Belt driven by camshaft

18. The specific gravity of Diesel is about

0.75

0.85

0.95

0.65

19. Which of the following oil is more viscous?

SAE 30

SAE 40

SAE 70

SAE 80

20. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Distance

Power

Page 3 of 5

21. The Diesel engine works on

Otto cycle

Carnot cycle

Rankine cycle

Diesel cycle

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

None of these

Overheating of the engine

Incomplete valve closure

Fouling of spark plug by gasoline

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

Generation of a braking effect at tight corners

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

24. The Diesel engines are also known as

Spark ignition (S.I.) engines

None of these

Steam engines

Compression ignition (C.I.) engines

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

14

65

175

82

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

Stop light bulb

Parking light bulb

Head light bulb

Ignition warning bulb

27. The effect of having excess camber is

Excessive steering alignment torque

Hard steering

Uneven tyre wear

Too much traction

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

All of these

Improved emission

Improved power output

Improved fuel efficiency

29. The power source for a brake booster is

Hydraulic pump

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

Exhaust manifold pressure

Electricity

30. Wheel base of a vehicle is the

Distance between the centres of the front and rear wheels

Distance between the centres of the front tyres

Distance between the centres of the rear tyres

Extreme length of the vehicle

Page 4 of 5

31. Cushioning springs in clutch plate reduces

Jerky starts

Vehicle speed

Torsional vibrations

None of these

32. The parking brake generally acts on

Front wheels

Propeller shaft

Front and rear wheels

Rear wheels

33. Tachometer in a vehicle measures

Speed

Engine r.p.m.

Fuel consumption

Distance

34. 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

2 × P.L.A.N

P.L.A.N/2

P.L.A.N/4

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

Matadors

Tractors

Trucks

Passenger cars

36. 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.

37. 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

38. Bead wires are made of

Copper

Zinc

Aluminium

Steel

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

100

110

120

90

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

5%

10%

15%

20%

Page 5 of 5

41. The commonly used antifreeze solution in automobiles is

Ethylene glycol

Ammonium chloride

Carbon disulphide

Freon-12

42. The main function of intake manifold is that it

Reduces intake noise

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

43. The specific gravity of petrol is about

0.95

1.25

0.75

0.85

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

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Adjust the damper spring tension

Rotate the tyres

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

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

Prevent uneven tyre wear

Maintain directional control

Compensate for wear in the steering linkage

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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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