The diffuser of an airplane engine decelerates the airflow from the fl – McqOptions

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1.	The diffuser of an airplane engine decelerates the airflow from the flight Mach number 0.85 to the compressor inlet Mach number 0.38. Assume that the ratio of the specific heats is constant and equal to 1.4. If the diffuser pressure recoveiy ratio is 0.92, then the isentropic efficiency of the diffuser is
A.	0.631
B.	0.814
C.	0.892
D.	1.343
Answer» C. 0.892

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