Chemical Engineering - Fluid Mechanics

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. 0.1
B. 0.55
C. 0.95
D. 1.85

Answer: Option C

Explanation:

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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

Answer: Option B

Explanation:

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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.

Answer: Option C

Explanation:

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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

Answer: Option C

Explanation:

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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.

Answer: Option C

Explanation:

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