Fluid Mechanics - Chemical Engineering Questions and Answers

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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.

logarithmic

linear

hyperbolic

parabolic

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

centrifugal

reciprocating

volute

gear

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Choking in case of pipe flow means that a

specified mass flow rate can not be achieved.

valve is closed in the line.

restriction in flow cross-section area occurs.

none of these.

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

thermal conductivity

electrical conductivity

specific gravity

electrical resistivity

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The nominal size of a hose pipe is specified by its

I.D.

O.D.

thickness

none of these

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Transition from laminar flow to turbulent flow is aided by the

surface roughness and curvature (i.e.sharp corners).

vibration.

pressure gradient and the compressibility of the flowing medium.

all (a), (b) & (c).

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For flow of fluids through packed bed, the superficial velocity is

less than the average velocity through channels.

more than the average velocity through channels.

dependent on the pressure drop across the bed.

same as the average velocity through channels.

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C_d is always __________ C_c.

greater than

less than

equal to

either more or less than

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Buoyant force

for non-symmetrical bodies is not vertical.

depends on the depth of the submergence of the floating body.

depends on the weight of the floating body.

none of these.