Over expansion occurs when exit area of nozzle is _________ than primary nozzle.
A. equal
B. smaller
C. greater
D. none of the mentioned
Answer:A
Over expansion occurs when exit area of nozzle is _________ than primary nozzle.
A. equal B. smaller C. greater D. none of the mentioned
Explanation: When exit area of nozzle is greater than primary nozzle then fluid suddenly expands leading to over expansion.