INTERNAL COMBUSTION ENGINES QUIZ

The process of breaking up or a liquid into fine droplets by spraying is called

Atomization

Carburetion

Vaporisation

Ionization

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The air standard efficiency of an I.C. engine depends on

Fuel used

None of these

Compression ratio

Speed of engine

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Diesel engine can work on very lean air fuel ratio of the order of 30: 1. A petrol engine can also work on such a lean ratio provided

Flywheel size is proper

Best quality fuel is used

It is properly designed

Cannot work as it is impossible

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In order to eliminate knocking in compression ignition engines, there should be

Late auto-ignition

High self ignition temperature of fuel

Short delay period

Low compression ratio

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Pre-ignition is caused by the spontaneous combustion of the mixture before the end of the compression stroke, and is due to

Overheated spark plug points

Cylinder walls being too hot

Any one of the listed here

Red hot carbon deposits on cylinder walls

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When crude oil is heated, then which of the following hydrocarbon is given off first?

Paraffin

Kerosene

Natural gas

Gasoline

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Which is more viscous lube oil?

SEA 30

SAE 80

SAE 70

SAE 50

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Crankcase explosion in I.C. engines usually occurs as

First a mild explosion followed by a bi explosion

Both mild and big explosions occurs simultaneously

First a big explosion followed by a mil explosion

Never occurs

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The term scavenging is generally associated with

2-stroke cycle engines

High efficiency engines

Aeroplane engines

4-stroke cycle engines

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The thermal efficiency of a standard Otto cycle for a compression ratio of 5.5 will be

0.25

0.5

0.7

1

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