Fluid Mechanics for Chemical MCQs

724 MCQs  — Chemical Engineering MCQs  (Page 39 of 73)

With increase in pump speed, its NPSH requirement_________________?
A. Decreases
B. Increases
C. Remains unaltered
D. Can either increase or decrease; depends on other factors
Pressure drag does not depend upon the_________________?
A. Roughness of surface of the body
B. Pressure of main flow only
C. Length of the body in flow direction
D. All a., b. and c.
A fluid is a substance, that_________________?
A. Has to be kept in a closed container
B. Is almost incompressible
C. Has zero shear stress
D. Flows when even a small shear is applied to it
The continuity equation__________________?
A. Relates mass flow rate along a stream tube
B. Relates work and energy
C. Stipulates that newton’s second law of motion must be satisfied at every point in the fluid
D. None of these