Automobile Engineering Practice Set-6

Page 1 of 5

1. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Distance

Power

2. The Diesel engines are also known as

None of these

Spark ignition (S.I.) engines

Compression ignition (C.I.) engines

Steam engines

3. The valve tappet clearance is measured by

Screw pitch gauge

Feeler gauge

Engineering scale

Vernier caliper

4. 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

Extreme length of the vehicle

Distance between the centres of the front tyres

5. Bead wires are made of

Aluminium

Copper

Zinc

Steel

6. 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

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

Gravity

None of these

Splashing action of the crankshaft

The pressure created by the oil pump

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

120

90

110

100

9. 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

None of these

Smaller than the positive terminal post

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

Rapid wearing of the brake pads

Localized wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

Page 2 of 5

11. The Diesel engine works on

Rankine cycle

Diesel cycle

Carnot cycle

Otto cycle

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

Improved fuel efficiency

Improved emission

All of these

Improved power output

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

Cylinder volume

Clearance volume

Exhaust volume

None of these

14. The specific gravity of petrol is about

1.25

0.75

0.85

0.95

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

Small end

Crank arm

Journal

Big end

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

Compensate for wear in the steering linkage

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

Maintain directional control

Prevent uneven tyre wear

17. The effect of having excess camber is

Hard steering

Uneven tyre wear

Excessive steering alignment torque

Too much traction

18. 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

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

175

82

14

65

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

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.

The differential carrier houses differential pinion gears and side gears.

The drive shafts are splined to the differential carrier.

Page 3 of 5

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

Rotate the tyres

Adjust the tyre pressure

Attach appropriate weights to the wheel at appropriate positions

Adjust the damper spring tension

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

2.81

1.82

1.00

1.28

23. The commonly used antifreeze solution in automobiles is

Freon-12

Ethylene glycol

Carbon disulphide

Ammonium chloride

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

Chain driven by crankshaft

Belt driven by crankshaft

Belt driven by drive-shaft

Belt driven by camshaft

25. Which of the following oil is more viscous?

SAE 40

SAE 70

SAE 80

SAE 30

26. The fuel that detonates easily, is

Iso-octane

N-heptane

Alcohol

Benzene

27. 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

28. The brake pedal during ABS operation

Pedal stroke becomes longer

Is pushed upward forcefully

All of the above

Transmits slight kickback to the driver's foot

29. Tachometer in a vehicle measures

Fuel consumption

Distance

Speed

Engine r.p.m.

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

Selects the synchronizer

Operates the clutch

Moves the synchronizer

Meshes the gears

Page 4 of 5

31. 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

32. The function of a governor in automobiles is to

Maintain constant engine speed

Maximise the fuel economy

Limit the vehicle speed

Limit the power

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

20%

10%

15%

5%

34. The parking brake generally acts on

Rear wheels

Propeller shaft

Front wheels

Front and rear wheels

35. Engine misfiring is likely to result from

Spark plug gap too small

Incorrect fuel air mixture

Vapours lock in the fuel only

Spark plug gap too wide

36. The main function of intake manifold is that it

Cools the intake air to a suitable temperature

Promotes the mixture of air and fuel

Distributes intake air equally to the cylinders

Reduces intake noise

37. The ease with which petrol vaporizes is called its

Oxidation

Octane number

Volatility

Cetane number

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

Large particles

Small particles

Sharp edged fragments

None of these

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

Air temperature

Air flow speed

Exhaust gas volume

Air-fuel ratio

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

The vehicle to pull to the side of lesser inclination

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

Generation of a braking effect at tight corners

Page 5 of 5

41. Cushioning springs in clutch plate reduces

Torsional vibrations

None of these

Jerky starts

Vehicle speed

42. The specific gravity of Diesel is about

0.95

0.75

0.85

0.65

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

Matadors

Passenger cars

Tractors

Trucks

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

Converts mechanical energy into electrical energy

Continually recharges the battery

Supply electric power

Partly converts engine power into electric power

45. 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

Automobile Engineering Practice Set-6

Related

Leave a ReplyCancel reply

Secured Payments

Protection

Automobile Engineering Practice Set-6

Share this Now with Friends:

Related

Leave a ReplyCancel reply

Secured Payments

Protection