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INTERNAL COMBUSTION ENGINES

Internal Combustion Engines
The reference fuels for knock rating of spark ignition engines would include

Normal octane and aniline
Iso-octane and alpha-methyl naphthalene
Iso-octane and normal hexane
Normal heptane and iso-octane

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Internal Combustion Engines
A diesel engine is ___ as compared to petrol engine, both running at rated load.

None of the listed here
Equally efficient
More efficient
Less efficient

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Internal Combustion Engines
The mechanical efficiency (ηm) of the engine is given by

ηm = B.P/I.P
ηm = (B.P × I.P)/100
None of the listed here
ηm = I.P/B.P

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Internal Combustion Engines
The power actually developed by the engine cylinder of an I.C. engine is known as

Indicated power
Actual power
None of the listed here
Theoretical power

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Internal Combustion Engines
Most high speed compression engines operate on

Dual combustion cycle
Special type of air cycle
Diesel cycle
Otto cycle

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