Surging is the phenomenon of___________________?

A. increases with increase in compression ratio
B. decreases with increase in compression ratio
C. is not dependent upon compressin ratio
D. may increase/decrease depending on compressor capacity
E. unpredictable

A. inlet losses
B. impeller channel losses
C. diffuser losses
D. all of the above
E. none of the above

A. compressor pressure ratio
B. highest pressure to exhaust pressure
C. inlet pressure to exhaust pressure
D. pressures across the turbine
E. none of the above

A. compressor work and turbine work
B. output and input
C. actual total head tempeature drop to the isentrpic total head drop from total head inlet to static head outlet
D. actual compressor work and theoretical comprssor work
E. none of the above

A. the propulsive matter is caused to flow around the propelled body
B. propulsive matter is ejected from within the propelled body
C. its functioning does not depend on presence of air
D. all of the above
E. none of the above