A. Atmospheric air
B. Compressed air
C. Water
D. None of these
A. Fanning’s
B. Ergun’s
C. Hagen-Poiseuille’s
D. None of these
A. 1/(y/3)
B. 2y/3
C. 1/(y/4)
D. 3y/4
A. Velocity changes linearly with radial distance
B. Flow is necessarily rotational
C. Radial component of velocity is same everywhere
D. Stream lines are not circular
A. Solids are completely entrained
B. The pressure drop is less than that for batch fluidisation
C. There is no entrainment of solids
D. Velocity of the fluid is very small
A. Shear stress
B. Shear force
C. Average drag per unit projected area
D. None of these
A. Increases
B. Decreases
C. Remain same
D. May increase or decrease
A. 5
B. 50
C. 500
D. 5000
A. Run at a lower speed for the same discharge
B. Do not need priming
C. Deliver fluid with pulsating/fluctuating discharge
D. Can be run with discharge line valve closed for a short interval
A. V1.8
B. V-0.2
C. V2.7
D. V2