INTERNAL COMBUSTION ENGINES QUIZ

Which is more viscous lube oil?

SAE 70

SAE 50

SAE 80

SEA 30

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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

It is properly designed

Best quality fuel is used

Cannot work as it is impossible

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The knock in diesel engine occurs due to

Instantaneous and rapid burning of the first part of the charge

Instantaneous auto ignition of last part of charge

Delayed burning of the first part of the charge

Reduction of delay period

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Which of the following statement is correct regarding normal cetane?

It is a standard fuel used for knock rating of diesel engines

It has long carbon chain structure

Its chemical name is normal hexadecane

All of these

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The inlet value of a four stroke cycle I.C engine remains open for nearly

235Â°

125Â°

200Â°

180Â°

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Iso-octane (C₈H₁₈) has octane number of

120

50

100

0

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In the opposed piston diesel engine, the combustion chamber is located

There is no such criterion

Below the piston

Between the pistons

Above the piston

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The theoretically correct air fuel ratio for petrol engine is of the order of

0.50069444444444

0.62569444444444

0.25069444444444

0.37569444444444

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The reflectivity depends upon

Geometry of the reflector

All of these

Properties of the reflector

Energy of neutrons

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The octane number of petrol, generally available, is

40 to 60

20 to 40

80 to 100

60 to 80

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