Fluid Mechanics for Chemical MCQs

724 MCQs  — Chemical Engineering MCQs  (Page 9 of 73)

Drag is defined as the force exerted by the___________________?
A. Fluid on the solid in a direction opposite to flow
B. Fluid on the solid in the direction of flow
C. Solid on the fluid
D. None of these
A relief valve__________________?
A. Provides back pressure for a cylinder
B. Unloads a pump
C. Is a directional control valve
D. None of these
Function of air vessel provided in a reciprocating pump is to_________________?
A. Reduce discharge fluctuation
B. Reduce the danger of cavitation
C. Avoid the necessity of priming
D. Increase the pump efficiency
Actual lift of a pump is always less than the theoretical lift and is limited by the__________________________?
A. Specific gravity & temperature of the liquid
B. Leakage & pressure decreasing at higher elevations
C. Frictional resistance through pipes, fittings & passages
D. All a., b. and c.
Mach number is the ratio of the speed of the _____________________?
A. Fluid to that of the light
B. Light to that of the fluid
C. Fluid to that of the sound
D. Sound to that of the fluid
In a fluidised bed reactor___________________?
A. Temperature gradients are very high
B. Temperature is more or less uniform
C. Hot spots are formed
D. Segregation of the solids occurs