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Automobile Engineering MCQ

The function of an alternator in an automobile is to

Convert mechanical energy into electrical energy

Partly convert engine power into electric power

Supply electric power

Continually recharge the battery

Answer

Correct Answer: Continually recharge the battery

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The diagram which shows the correct crank positions corresponding to the opening and closing of the valves, is known as

None of these

Indicator diagram

Axial force diagram

Valve timing diagram

Answer

Correct Answer: Valve timing diagram

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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

Answer

Correct Answer: Distributes intake air equally to the cylinders

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A clutch is usually designed to transmit maximum torque which is

80 per cent of the maximum engine torque

None of these

150 per cent of the maximum engine torque

Equal to the maximum engine torque

Answer

Correct Answer: 150 per cent of the maximum engine torque

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

Rapid wearing of the brake pads

Judder during braking

Ineffectiveness of the brakes

Localized wearing of the brake pads

Answer

Correct Answer: Judder during braking

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If the engine coolant leaks into the engine oil, then engine oil

Appears milky

Turns black

None of these

Becomes foamy

Answer

Correct Answer: Appears milky

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Positive camber is used to compensate for wheels tilting inward due to the weight of the vehicle.

Yes

Answer

Correct Answer: Yes

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A baffle plate is fitted inside the oil pan to prevent the oil from splashing when it is subjected to vibration and other movement during vehicle operation.

False

True

Answer

Correct Answer: True

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The flywheel and the pressure plate bind the clutch disc between them so that the engine and the transmission can be engaged.

Yes

Answer

Correct Answer: Yes

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The natural gas is compressed in a CNG cylinder at a pressure of

250 bar

300 bar

220 bar

200 bar

Answer

Correct Answer: 200 bar

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In a spark plug, when the temperature of the central electrode exceeds a certain temperature, any carbon that has adhered will be burnt off, and the temperature at which this burning off carbon starts is referred to as the self cleaning temperature.

Correct

Incorrect

Answer

Correct Answer: Correct

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In a fuel injection system, the electronic control module (ECM) calculates the optimum fuel-injection volume for the engine condition based on the data received from the sensors, and injects this volume of fuel into the intake manifold at the optimum timing.

Correct

Incorrect

Answer

Correct Answer: Correct

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The most commonly used supplementary restraint system (SRS) component is

Airbag

Steering

Brake

Seat belt

Answer

Correct Answer: Airbag

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The coefficient of friction for the clutch facing is approximately

0.8

1.2

0.1

0.4

Answer

Correct Answer: 0.8

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If the level of tension in the belt is too high, it can result in a loss of power or in bending of the rotating shaft or crankshaft.

Correct

Incorrect

Answer

Correct Answer: Correct

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In automobiles G.V.W. refers to

Gross vehicle wheel track

Gross vehicle weight

Gross vehicle wheel base

Gross vehicle width

Answer

Correct Answer: Gross vehicle weight

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The portion of a crankshaft which rests on cylinder block is called main journal.

Yes

Answer

Correct Answer: Yes

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In a unit type body (frameless body) design, the sheet metal parts are welded together, forming a frame work to which outer skin is attached.

True

False

Answer

Correct Answer: True

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The air gap between the central electrode and ground (or side) electrode of a spark plug is around

0.5 mm

1 mm

1.5 mm

0.2 mm

Answer

Correct Answer: 1 mm

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In radial tyres

Inner tubes are always used

All plies run parallel to one another and vertical to tyre bead

One ply layer runs diagonally one way and another layer runs diagonally the other way

None of these

Answer

Correct Answer: All plies run parallel to one another and vertical to tyre bead

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