Automobile Engineering Practice Set-6

Page 1 of 5

1. 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

2. The main function of intake manifold is that it

Distributes intake air equally to the cylinders

Promotes the mixture of air and fuel

Reduces intake noise

Cools the intake air to a suitable temperature

3. 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

P.L.A.N/4

2 × P.L.A.N

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

110

120

90

100

5. The specific gravity of Diesel is about

0.75

0.65

0.85

0.95

6. The valve tappet clearance is measured by

Engineering scale

Screw pitch gauge

Vernier caliper

Feeler gauge

7. Which of the following oil is more viscous?

SAE 80

SAE 40

SAE 70

SAE 30

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

1-2-3-4

1-2-4-3

1-3-2-4

1-3-4-2

9. The Diesel engine works on

Rankine cycle

Diesel cycle

Carnot cycle

Otto cycle

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

Small end

Journal

Crank arm

Big end

Page 2 of 5

11. 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

12. The ease with which petrol vaporizes is called its

Volatility

Octane number

Cetane number

Oxidation

13. The fuel that detonates easily, is

Benzene

Iso-octane

N-heptane

Alcohol

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

Passenger cars

Tractors

Matadors

Trucks

15. Engine misfiring is likely to result from

Incorrect fuel air mixture

Spark plug gap too wide

Vapours lock in the fuel only

Spark plug gap too small

16. 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

17. Cushioning springs in clutch plate reduces

Torsional vibrations

Jerky starts

None of these

Vehicle speed

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

20%

15%

5%

10%

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

82

175

65

14

20. Bead wires are made of

Zinc

Steel

Copper

Aluminium

Page 3 of 5

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

Small particles

Large particles

Sharp edged fragments

None of these

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

Localized wearing of the brake pads

Ineffectiveness of the brakes

Judder during braking

Rapid wearing of the brake pads

23. The function of a governor in automobiles is to

Maintain constant engine speed

Limit the vehicle speed

Limit the power

Maximise the fuel economy

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

1.28

2.81

1.00

1.82

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

Maintain directional control

Prevent uneven tyre wear

Compensate for wear in the steering linkage

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

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

Moves the synchronizer

Selects the synchronizer

Operates the clutch

Meshes the gears

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

Overheating of the engine

None of these

Incomplete valve closure

Fouling of spark plug by gasoline

28. Odometer is an instrument used for measurement of

Engine r.p.m.

Fuel consumption

Distance

Power

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

Air-fuel ratio

Air temperature

Air flow speed

Exhaust gas volume

30. The power source for a brake booster is

Exhaust manifold pressure

Hydraulic pump

Electricity

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

Page 4 of 5

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

The vehicle to pull to the side of lesser inclination

Generation of a braking effect at tight corners

Tendency to assume toe-out orientation

Poor recovery of the steering wheel after making a turn

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

Adjust the damper spring tension

Attach appropriate weights to the wheel at appropriate positions

Adjust the tyre pressure

Rotate the tyres

33. The brake pedal during ABS operation

All of the above

Is pushed upward forcefully

Transmits slight kickback to the driver's foot

Pedal stroke becomes longer

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

Of the same size as the positive terminal post

Smaller than the positive terminal post

None of these

Larger than the positive terminal post

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

Continually recharges the battery

Supply electric power

Converts mechanical energy into electrical energy

Partly converts engine power into electric power

36. The specific gravity of petrol is about

0.75

0.85

1.25

0.95

37. The parking brake generally acts on

Front and rear wheels

Propeller shaft

Front wheels

Rear wheels

38. The effect of having excess camber is

Uneven tyre wear

Excessive steering alignment torque

Too much traction

Hard steering

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

The pressure created by the oil pump

Gravity

None of these

Splashing action of the crankshaft

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

Improved emission

Improved power output

All of these

Improved fuel efficiency

Page 5 of 5

41. The Diesel engines are also known as

Steam engines

None of these

Compression ignition (C.I.) engines

Spark ignition (S.I.) engines

42. The commonly used antifreeze solution in automobiles is

Freon-12

Carbon disulphide

Ethylene glycol

Ammonium chloride

43. Tachometer in a vehicle measures

Speed

Distance

Engine r.p.m.

Fuel consumption

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; each pinion gear meshes with a different side gear.

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.

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

Ignition warning bulb

Parking light 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