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Chemical Engineering - Fluid Mechanics

Exercise

"To err is human; to forgive, divine."
- Alexander Pope
1. 

The ratio of the depth of flow to the diameter of the channel for maximum discharge in a circular channel in open channel flow is
A. 0.1B. 0.55
C. 0.95D. 1.85
2. 

A conical tank with a bottom opening of cross-sectional area A is filled with water and is mounted on supports as shown in the figure. What is the force F with which plate X must be pushed up to prevent water from leaking ? Assume that the density of air is negligible as compared to the density of water ρL.
A. ρL . Vg
B. ρL . A.Hg
C. ρL . Vg/2
D. ρL .Vg/3
3. 

A relief valve
A. provides back pressure for a cylinder.
B. unloads a pump.
C. is a directional control valve.
D. none of these.
4. 

An isentropic process is the one, in which
A. pv = constant
B. pvr = constant
C. pvr = constant, and process is reversible
D. none of these
5. 

The distribution of shear stress in a stream of fluid in a circular tube is
A. linear with radius for turbulent flow only.
B. linear with radius for laminar flow only.
C. linear with radius for both laminar & turbulent flow.
D. parabolic with radius for both laminar & turbulent flow.

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