The time taken for gravity flow of a fixed volume of liquid (as in Redwood viscometer) is directly proportional to its __________________?

A. Equivalent
B. Transition
C. Prandtl mixing
D. None of these

A. Mean flow velocity is about 0.5 times the maximum velocity
B. Velocity profile becomes flatter and flatter with increasing Reynolds number
C. Point of maximum instability exists at a distance of 2r/3 from the pipe wall (r = pipe radius)
D. Skin friction drag, shear stresses, random orientation of fluid particles and slope of velocity
profile at the wall are more

A. Decrease in effect
B. Increase in thrust
C. Develops noise
D. Develops high pressure

A. Fanning’s
B. Ergun’s
C. Hagen-Poiseuille’s
D. None of these

A. Always inversely proportional to the Reynolds number
B. Not dimensionless
C. Not dependent on the roughness of the pipe
D. None of these

A. Dependent on Reynolds number
B. Independent of Reynolds number
C. Dependent on the length of the pipe
D. None of these