# Chemical Engineering - Fluid Mechanics

26.

Location of vena-contracta in an orificemeter does not depend upon the

 A. type of orifice. B. density, viscosity & compressibility of the fluid. C. ratio of pipe diameter to orifice diameter. D. pipe roughness.

Explanation:

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27.

At low Reynolds number

 A. viscous forces are unimportant. B. viscous forces control. C. viscous forces control and inertial forces are unimportant. D. gravity forces control.

Explanation:

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28.

For laminar flow through a closed conduit

 A. Vmax = 2Vav B. Vmax = Vav C. Vmax = 1.5Vav D. Vmax = 0.5Vav

Explanation:

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29.

In Newton's law range, the terminal velocity of a solid spherical particle falling through a stationary fluid mass varies as the __________ of its diameter.

 A. inverse B. square root C. second power D. first power

Explanation:

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30.

Unsteady uniform flow is represented by flow through a/an

 A. long pipe at constant rate. B. long pipe at decreasing rate. C. expanding tube at increasing rate. D. expanding tube at constant rate.