Surging is the phenomenon of___________________?

Compressors, Gas Turbines and Jet Engines 09/10/2020

A. air stream blocking the passage
B. motion of air at sonic velocity
C. unsteady, periodic and reversed flow
D. air stream not able to follow the blade contour
E. production of no air pressure

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    Out of the following, from where you will prefer to take intake for air compressor_________________?
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    The ratio of isentropic work to Euler work is known as_____________________?
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