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Internal Combustion Engines

Internal Combustion Engines
The normal heptane (C₇H₁₆) is given a rating of ________ octane number.

100
50
120

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Internal Combustion Engines
Scavenging is usually done to increase

Fuel consumption
Thermal efficiency
Speed
Power output

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Internal Combustion Engines
The knocking tendency in spark ignition engines may be decreased by

Controlling the exhaust temperature
Reducing the compression ratio
Controlling the ignition timing
Controlling the air-fuel mixture

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Internal Combustion Engines
The method of determination of indicated power of a multi cylinder spark ignition engine is by the use of

Motoring test
Morse test
Prony brake test
Heat balance test

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

Air and fuel
Fuel alone
Air and lub oil
Air alone

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Internal Combustion Engines
Which of the following fuel has little tendency towards detonation?

Normal heptane
Iso-octane
Benzene
Alcohol

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