Chemical Engineering MCQs

Page No. 243

With the increase in depth, the hydrostatic pressure in an un-accelerated incompressible fluid (in a constant gravitational field) ?


aDecreases


bIncreases linearly


cIncreases exponentially


dRemain constant


View Answer Increases linearly

For a given fluid flow rate, which of the following incurs maximum head loss ?


aOrificemeter


bVenturimeter


cFlow nozzle


dAll of them incur the same head loss


View Answer Orificemeter

For a fluid rotating at constant angular velocity about vertical axis as a rigid body, the pressure intensity varies as the___________________?


aSquare of the radial distance


bRadial distance linearly


cInverse of the radial distance


dElevation along vertical direction



In a fluidised bed reactor___________________?


aTemperature gradients are very high


bTemperature is more or less uniform


cHot spots are formed


dSegregation of the solids occurs



What type of motion the fluid element undergoes, when it changes from one position to another position, such that the angle between the two sides changes ?


aRotation


bTranslation


cLinear deformation


dAngular deformation


View Answer Angular deformation

Mach number is the ratio of the speed of the _____________________?


aFluid to that of the light


bLight to that of the fluid


cFluid to that of the sound


dSound to that of the fluid



Actual lift of a pump is always less than the theoretical lift and is limited by the__________________________?


aSpecific gravity & temperature of the liquid


bLeakage & pressure decreasing at higher elevations


cFrictional resistance through pipes, fittings & passages


dAll A., B. and C.


View Answer All A., B. and C.

Low specific speed of a pump implies that, it is a/an ______________ pump?


aAxial flow


bCentrifugal


cMixed flow


dNone of these


View Answer Centrifugal

Function of air vessel provided in a reciprocating pump is to_________________?


aReduce discharge fluctuation


bReduce the danger of cavitation


cAvoid the necessity of priming


dIncrease the pump efficiency



A relief valve__________________?


aProvides back pressure for a cylinder


bUnloads a pump


cIs a directional control valve


dNone of these



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