Chemical Engineering MCQs

Page No. 214

Pressure drag does not depend upon the_________________?


aRoughness of surface of the body


bPressure of main flow only


cLength of the body in flow direction


dAll A., B. and C.


View Answer All A., B. and C.

With increase in pump speed, its NPSH requirement_________________?


aDecreases


bIncreases


cRemains unaltered


dCan either increase or decrease; depends on other factors


View Answer Increases

The fluid in which the shearing stress within it is proportional to the velocity gradient across the sheared section, is called a _____________ fluid?


aBingham


bNewtonian


cPerfect


dNone of these


View Answer Newtonian

Nominal size of a pipe is an indication of its ______________ diameter?


aInner


bOuter


cApproximate


dNone of these


View Answer Approximate

The velocity profile for turbulent flow through a closed conduit is_______________?


aLogarithmic


bParabolic


cHyperbolic


dLinear


View Answer Logarithmic

Brownian movement is prominent in the particle size range of _____________ microns in case of settling of a particle in a fluid?


a2 to 3


b0.01 to 0.10


c200 to 300


d100 to 1000


View Answer 2 to 3

A fluid is the one, which___________________?


aCannot remain at rest under the action of shear force


bContinuously expands till it fills any container


cIs incompressible


dPermanently resists distortion



Which of the following is not a dimension-less parameter ?


aEuler number


bSpecific gravity


cFanning friction factor


dNone of these


View Answer None of these

Steady uniform flow is represented by flow through a/an ___________________?


aLong pipe at constant rate


bLong pipe at decreasing rate


cExpanding tube at constant rate


dNone of these



With increasing flow rate, the hydraulic efficiency of a centrifugal pump__________________?


aMonotonically decreases


bDecreases and then increases


cRemains constant


dIncreases and then decreases



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