Highest useful compression ratio (HUCR) is the highest compression ratio at which the

A Engine can run
B Engine gives maximum output
C Engine is most efficient
D Fuel can be used in a test engine without knocking

Correct Answer: Fuel can be used in a test engine without knocking


Highest Useful Compression Ratio (HUCR) is the compression ratio at which a fuel can be used without detonation in a specified test engine under specified operating condition and the ignition and mixture strength being adjusted to give best efficiency
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B Work done in subsequent stages should increase
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