Chemical Engineering MCQs

Page No. 214

Pressure drag does not depend upon the_________________?


aRoughness of surface of the body

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bPressure of main flow only

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cLength of the body in flow direction

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dAll A., B. and C.

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View Answer All A., B. and C.

With increase in pump speed, its NPSH requirement_________________?


aDecreases

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bIncreases

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cRemains unaltered

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dCan either increase or decrease; depends on other factors

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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

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bNewtonian

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cPerfect

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dNone of these

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View Answer Newtonian

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


aInner

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bOuter

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cApproximate

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dNone of these

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View Answer Approximate

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


aLogarithmic

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bParabolic

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cHyperbolic

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dLinear

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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

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b0.01 to 0.10

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c200 to 300

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d100 to 1000

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View Answer 2 to 3

A fluid is the one, which___________________?


aCannot remain at rest under the action of shear force

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bContinuously expands till it fills any container

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cIs incompressible

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dPermanently resists distortion

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


aEuler number

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bSpecific gravity

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cFanning friction factor

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dNone of these

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View Answer None of these

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


aLong pipe at constant rate

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bLong pipe at decreasing rate

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cExpanding tube at constant rate

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dNone of these

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


aMonotonically decreases

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bDecreases and then increases

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cRemains constant

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dIncreases and then decreases

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