A. Back flow through impeller
B. Loss of kinetic head
C. Loss of static head
D. None of these
A. CD = 16/Re.p
B. CD = 24/Re.p
C. CD = 18.4/Re.p
D. CD = 0.079/Re
0.25.p
A. Q = Q1 + Q2 + Q3
B. V1 = V2 = V3
C. Q1 = Q2 = Q3
D. f = f1 + f2 + f3
A. Needle
B. Globe
C. Gate
D. Butterfly
A. 2
B. 2
D. 1/2
A. Changing the speed of rotation
B. Bleeding air into suction
C. Bypassing liquid from the suction or discharge line
D. All A., B. and C.
A. Generally a needle valve
B. Used to release any gases that might be vapour locking the pump
C. Helpful in easy removal of samples
D. All A., B. and C.
A. Dilatant
B. Bingham plastic
C. Newtonian
D. Pseudo-plastic
A. Passing the centroid of the body at 60°to the direction of motion
B. The component being parallel to the flow direction
C. The component being normal to the flow direction
D. None of these
A. It is not very accurate
B. It is very costly
C. Most of the pressure drop is not recoverable
D. It is not suitable for measuring gas flow