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

Splashing action of the crankshaft

None of these

Gravity

The pressure created by the oil pump

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

Prevent uneven tyre wear

Maintain directional control

Compensate for wear in the steering linkage

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

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

1-2-4-3

1-3-2-4

1-2-3-4

1-3-4-2

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

Exhaust gas volume

Air flow speed

Air-fuel ratio

Air temperature

5. Tachometer in a vehicle measures

Fuel consumption

Engine r.p.m.

Speed

Distance

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

Trucks

Passenger cars

Tractors

Matadors

7. The valve tappet clearance is measured by

Engineering scale

Screw pitch gauge

Feeler gauge

Vernier caliper

8. The power source for a brake booster is

Exhaust manifold pressure

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

Electricity

Hydraulic pump

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

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

10. The commonly used antifreeze solution in automobiles is

Ammonium chloride

Ethylene glycol

Freon-12

Carbon disulphide

Page 2 of 5

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

82

65

14

175

12. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

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

Clearance volume

Cylinder volume

None of these

Exhaust volume

14. Cushioning springs in clutch plate reduces

Jerky starts

None of these

Vehicle speed

Torsional vibrations

15. 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

16. Bead wires are made of

Copper

Steel

Aluminium

Zinc

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

Sharp edged fragments

Large particles

Small particles

None of these

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

20%

10%

15%

5%

19. The effect of having excess camber is

Uneven tyre wear

Too much traction

Excessive steering alignment torque

Hard steering

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

Incomplete valve closure

Overheating of the engine

None of these

Fouling of spark plug by gasoline

Page 3 of 5

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

Improved fuel efficiency

Improved power output

Improved emission

All of these

22. The fuel that detonates easily, is

N-heptane

Alcohol

Iso-octane

Benzene

23. 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

24. 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

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

1.82

2.81

1.00

1.28

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/2

2 × P.L.A.N

P.L.A.N

P.L.A.N/4

27. The ease with which petrol vaporizes is called its

Cetane number

Oxidation

Volatility

Octane number

28. 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

29. 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

30. 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

Page 4 of 5

31. The specific gravity of petrol is about

1.25

0.95

0.85

0.75

32. The function of a governor in automobiles is to

Limit the vehicle speed

Maximise the fuel economy

Limit the power

Maintain constant engine speed

33. Odometer is an instrument used for measurement of

Distance

Fuel consumption

Power

Engine r.p.m.

34. The parking brake generally acts on

Propeller shaft

Front and rear wheels

Front wheels

Rear wheels

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

Small end

Journal

Big end

Crank arm

36. The Diesel engine works on

Otto cycle

Rankine cycle

Diesel cycle

Carnot cycle

37. Which of the following oil is more viscous?

SAE 30

SAE 70

SAE 40

SAE 80

38. The specific gravity of Diesel is about

0.85

0.75

0.95

0.65

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

Larger than the positive terminal post

Of the same size as the positive terminal post

Smaller than the positive terminal post

None of these

40. Which one of the following statement correctly describes the construction of a bevel gear type differential?

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.

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

The differential carrier houses differential pinion gears and side gears.

Page 5 of 5

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

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

Converts mechanical energy into electrical energy

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

Meshes the gears

Moves the synchronizer

Selects the synchronizer

Operates the clutch

43. Wheel base of a vehicle is the

Extreme length of the vehicle

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

44. Engine misfiring is likely to result from

Spark plug gap too small

Spark plug gap too wide

Vapours lock in the fuel only

Incorrect fuel air mixture

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

110

100

120

90

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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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