A) Unsteady, periodic and reversed flow
B) Forward motion of air at a speed above sonic velocity
C) The surging action due to the blast of blade shap on in a compressor.
D) Forward movement of aircraft.
Please Wait you are being redirected....
You need to login to perform this action.You will be redirected in
OTP has been sent to your mobile number and is valid for one hour
Your mobile number is verified.