Chemical Engineering MCQs

Page No. 203

The ratio of wall drag to total drag in the Stoke’s law range is_________________?


a0.5

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b1

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c1/3

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d2/3

✓


View Answer 2/3

Which of the following is not a colligative property ?


aOsmotic pressure

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bDepression of freezing point

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c Lowering of vapor pressure

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dNone of these

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View Answer None of these

Turbulent flow generally occurs for cases involving__________________?


aHighly viscous fluid

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bVery narrow passages

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cVery slow motion

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dNone of these

✓


View Answer None of these

Total energy at a point comprises of _____________ energy?


aPotential & kinetic

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bPressure

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cInternal

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dAll A., B. & C.

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View Answer All A., B. & C.

In an incompressible fluid, the density is____________________?


aGreatly affected by moderate changes in pressure

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bGreatly affected only by moderate changes in temperature

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cNot affected with moderate change in temperature & pressure

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dSensible to changes in both temperature & pressure

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Reciprocating pumps are not able to compete with the centrifugal pump for industrial use, mainly because these pumps have_____________?


aVery low speeds

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bSmaller discharge

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cHigher capital &maintenance cost

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dHigh vibrations

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Enthalpy change resulting, when unit mass of solid is wetted with sufficient liquid, so that further addition of liquid produces no additional thermal effect, is called the heat of________________?


aMixing

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bAdsorption

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cWetting

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dComplete wetting

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View Answer Complete wetting

Check in a centrifugal pump is________________?


aProvided in the discharge line

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bGenerally a globe valve

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cProvided to prevent liquid from backing up through the pump when the pump is turned off or accidently stops running

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dAll A., B. and C.

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View Answer All A., B. and C.

The heat of solution depends upon the____________________?


aNature of solvent

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bConcentration of solution

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cNature of solute

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dAll A., B. & C.

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View Answer All A., B. & C.

For pipe flows, head is proportional to __________ at constant capacity(where, D = pipe diameter) ?


a1/D

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b1/D2

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c1/D5

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dD2

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View Answer 1/D5

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