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Internal Combustion Engines

Internal Combustion Engines
In petrol engine, using a fixed octane rating fuel and fixed compression ratio, supercharging will _________ the knocking tendency.

Not effected
Increase
None of these
Decrease

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Internal Combustion Engines
The reason for supercharging in any engine is to

Increase power
Effect fuel economy
Increase efficiency
Reduce weight and bulk for a given output

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Internal Combustion Engines
Iso-octane (C₈H₁₈) has octane number of

100
120
0
50

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Internal Combustion Engines
The effective inhibitor of pre-ignition is

None of these
Lead
Alcohol
Water

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Internal Combustion Engines
The compression ignition engines are governed by

Hit and miss governing
Combination of (B) and (C)
Quantitative governing
Qualitative governing

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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.

One-half
Four-times
Equal to
Twice

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