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Air Standard Efficiency of Otto Cycle Depends on

By BYJU'S Exam Prep

Updated on: September 25th, 2023

Air standard efficiency of Otto cycle depends on

A. Expansion ratio
B. Cutoff ratio
C. Compression ratio
D. All of the above.

Find the correct answer from the given option.

Answer: C- Compression ratio

Air standard efficiency of Otto cycle depends on compression ratio.

Solution: 

Otto cycles are one form of air standard cycles that are regarded as the best cycles for the functioning of reciprocating internal combustion engines with spark ignition. The air standard efficiency of the Otto cycle is defined as the output work divided by the total input heat. It is given as;

η = Work/Heat Input = 1 – 1/r-1)

  • where r represents the compression ratio.

From the above expression, it is clear that the air standard efficiency of the Otto cycle depends on the compression ratio.

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