Power required by a centrifugal pump is proportional to (where, D = diameter, N = r.p.m) ________________?

A. Irrotational and frictionless flow
B. Irrotational and frictional flow
C. One in which dissipation of mechanical energy into heat occurs
D. Formation of eddies within the stream

A. Cannot remain at rest under the action of shear force
B. Continuously expands till it fills any container
C. Is incompressible
D. Permanently resists distortion

A. V2
B. 1/V2
C. 1/V
D. V

A. Long pipe at constant rate
B. Long pipe at decreasing rate
C. Expanding tube at increasing rate
D. Expanding tube at constant rate

A. Constant
B. Variable
C. Both A. & B.
D. Neither A. nor B.

A. 0
B. 1
C. ∞
D. 0.5