Intercooling in gas turbine results in ____________________ ?

A. increase in net output but decrease in thermal efficiency
B. increase in thermal efficiency but decrease in net output
C. increase in both thermal efficiency and net output
D. decrease in both thermal efficiency and net output
E. none of the above

Surging is the phenomenon of___________________?

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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