Chemical Engineering MCQs

Page No. 203

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


a0.5


b1


c1/3


d2/3


View Answer 2/3

Which of the following is not a colligative property ?


aOsmotic pressure


bDepression of freezing point


c Lowering of vapor pressure


dNone of these


View Answer None of these

Turbulent flow generally occurs for cases involving__________________?


aHighly viscous fluid


bVery narrow passages


cVery slow motion


dNone of these


View Answer None of these

Total energy at a point comprises of _____________ energy?


aPotential & kinetic


bPressure


cInternal


dAll A., B. & C.


View Answer All A., B. & C.

In an incompressible fluid, the density is____________________?


aGreatly affected by moderate changes in pressure


bGreatly affected only by moderate changes in temperature


cNot affected with moderate change in temperature & pressure


dSensible to changes in both temperature & pressure



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


aVery low speeds


bSmaller discharge


cHigher capital &maintenance cost


dHigh vibrations



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


bAdsorption


cWetting


dComplete wetting


View Answer Complete wetting

Check in a centrifugal pump is________________?


aProvided in the discharge line


bGenerally a globe valve


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


dAll A., B. and C.


View Answer All A., B. and C.

The heat of solution depends upon the____________________?


aNature of solvent


bConcentration of solution


cNature of solute


dAll A., B. & C.


View Answer All A., B. & C.

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


a1/D


b1/D2


c1/D5


dD2


View Answer 1/D5

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