Chemical Engineering - Fluid Mechanics

1. 

The ratio of the wall drag to the form drag in the Stoke's law range (for motion of spherical particles in a stationary fluid) is

A. 0.5
B. 1
C. 2
D. 0.33

Answer: Option C

Explanation:

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2. 

For turbulent flow in smooth circular pipe, the velocity distribution is a function of the distance 'd' measured from the wall of the pipe and the friction velocity 'v', and it follows a __________ relationship.

A. logarithmic
B. linear
C. hyperbolic
D. parabolic

Answer: Option A

Explanation:

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3. 

Maintenance cost of a __________ pump for a particular duty is the least.

A. centrifugal
B. reciprocating
C. volute
D. gear

Answer: Option A

Explanation:

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4. 

Choking in case of pipe flow means that a

A. specified mass flow rate can not be achieved.
B. valve is closed in the line.
C. restriction in flow cross-section area occurs.
D. none of these.

Answer: Option A

Explanation:

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5. 

Velocity of liquid hydrocarbon fuels in a pipeline can not be measured by magnetic flowmeters, because their __________ is very low/small.

A. thermal conductivity
B. electrical conductivity
C. specific gravity
D. electrical resistivity

Answer: Option B

Explanation:

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