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Internal Combustion Engines

Internal Combustion Engines
Which of the following medium is compressed in a Diesel engine cylinder?

Air and lub oil
Air alone
Fuel alone
Air and fuel

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Internal Combustion Engines
Number of working strokes per min. for a four stroke cycle engine are _________ the speed of the engine in r.p.m.

Twice
Equal to
One-half
Four-times

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Internal Combustion Engines
A fuel of an octane number rating of 75 matches in knocking intensity as a mixture of

75% normal heptane and 25% iso-octane
75% diesel and 25% petrol
75% petrol and 25% diesel
75% iso-octane and 25% normal heptane

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Internal Combustion Engines
The turbine of the turboprop engine is ___ that of the turbojet engine.

Smaller than
None of the listed here
Same as
Bigger than

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Internal Combustion Engines
An hmh flame speed is obtained in diesel engine when air fuel ratio is

About 35% of rich mixture
About 10% of rich mixture
Chemically correct mixture
Uniform throughout the mixture

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Internal Combustion Engines
If the speed of the engine is increased, the indicated power will

Decrease
Increase
Remain same
None of these

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