Fluid Mechanics - Chemical Engineering Questions and Answers

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Fanning equation is given by. It is applicable to __________ region flow.

transition

laminar

turbulent

both (b) and (c)

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With a constant diameter impeller of a centrifugal pump

its capacity varies directly as the square of speed.

head varies as the square of speed.

horsepower input varies as the square of speed.

head varies as the speed.

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For water, when the pressure increases, the viscosity

also increases

decreases

remains constant

first decreases, and then increases

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The head loss due to sudden expansion is

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

type of orifice.

density, viscosity & compressibility of the fluid.

ratio of pipe diameter to orifice diameter.

pipe roughness.

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At low Reynolds number

viscous forces are unimportant.

viscous forces control.

viscous forces control and inertial forces are unimportant.

gravity forces control.

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For laminar flow through a closed conduit

V_max = 2V_av

V_max = V_av

V_max = 1.5V_av

V_max = 0.5V_av

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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.

inverse

square root

second power

first power

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Unsteady uniform flow is represented by flow through a/an

long pipe at constant rate.

long pipe at decreasing rate.

expanding tube at increasing rate.

expanding tube at constant rate.