INTERNAL COMBUSTION ENGINES QUIZ

In a four stroke cycle petrol engine, the pressure inside the engine cylinder during the suction stroke is __________ the atmospheric pressure.

Above

Below

None of these

Equal to

TRUE ANSWER : ?
YOUR ANSWER : ?

The specific fuel consumption per B.P. hour for a diesel engine is about

0.35 kg

0.2 kg

0.25 kg

0.3 kg

TRUE ANSWER : ?
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The ignition quality of petrol is expressed by

Cetane number

All of these

Calorific value

Octane number

TRUE ANSWER : ?
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The output of a diesel engine can be increased without increasing the engine revolution or size in following way

Supercharging

Heating incoming air

Scavenging

Feeding more fuel

TRUE ANSWER : ?
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In the crankcase method of scavenging, the air pressure is produced by

Supercharger

Natural aspirator

Centrifugal pump

Movement of engine piston

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Detonation is harmful due to

Increase in the rate of heat transfer, there is a reduction in the power output and efficiency of the engine

High intensity of knock causes crankshaft vibration and the engine runs rough

None of these

Excessive turbulence which removes most of the insulating gas boundary layer from the cylinder walls

TRUE ANSWER : ?
YOUR ANSWER : ?

The injection pressure in a diesel engine is about

100 bar

10 bar

500 bar

150 bar

TRUE ANSWER : ?
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The probability of knocking in diesel engines is increased by

All of these

Higher viscosity

High self ignition temperature

Low volatility

TRUE ANSWER : ?
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Which of the following is false statement? Some of the methods used to reduce diesel smoke are as follows

Using additives in the fuel

Avoidance of overloading

Adherence to proper fuel specification

Increasing the compression ratio

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The cetane (C₁₆H₃₄) which is a straight chain paraffin, is assigned a cetane number of

0

50

100

120

TRUE ANSWER : ?
YOUR ANSWER : ?