Chemical Engineering - Fluid Mechanics

36. 

Drag force on the float of a rotameter is(where Q = flow rate of the )

A. Q
B. Q
C. Q2
D. constant

Answer: Option D

Explanation:

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37. 

The unit of dynamic viscosity in SI unit is

A. kg/m . sec
B. N/m2
C. m2 /sec.
D. m/N. sec.

Answer: Option A

Explanation:

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38. 

Pressure drop (Δp) for a fluid flowing in turbulent flow through a pipe is a function of velocity (V) as

A. V1.8
B. V-0.2
C. V2.7
D. V2

Answer: Option D

Explanation:

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39. 

Dean number is concerned with the

A. fluid-particle interaction.
B. fluid flow through helical pipes.
C. power consumption in agitated vessels.
D. psychrometry.

Answer: Option B

Explanation:

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40. 

The equation given below is called the __________ .

f-0.5 = 4.07 loge (NRef)-0.6

A. Colebrook formula
B. Von-Karman equation
C. Fanning equation
D. none of these

Answer: Option B

Explanation:

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