Chemical Engineering - Fluid Mechanics

21. 

In case of isentropic flow, the speed of sound in an ideal gas is proportional to (where, T = absolute temperature )

A. 1/T
B. 1/T
C. T
D. T

Answer: Option C

Explanation:

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22. 

Applying a pressure drop across a capillary results in a volumetric flow rate 'Q' under laminar flow conditions. The flow rate for the same pressure drop, in a capillary of the same length but half the radius is

A. Q/2
B. Q/4
C. Q/8
D. Q/16

Answer: Option D

Explanation:

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23. 

Cd, Cc and Cv are related (for flow through an orifice) as (where, Cd = discharge co-efficient
Cc = co-efficient of contraction

Cv = co-efficient of velocity
)

A. Cd = Cc/Cv
B. Cd = Cc.Cv
C. Cd = Cv/cc
D. none of these

Answer: Option B

Explanation:

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24. 

In an incompressible fluid, the density is

A. greatly affected by moderate changes in pressure.
B. greatly affected only by moderate changes in temperature.
C. not affected with moderate change in temperature & pressure.
D. sensible to changes in both temperature & pressure.

Answer: Option C

Explanation:

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25. 

Check valves are used

A. at high pressure.
B. in bends.
C. for controlling water flow.
D. for unidirectional flow.

Answer: Option D

Explanation:

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