Chemical Engineering MCQs

Page No. 209

With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost________________?


aIncreases


bDecreases


cRemains unchanged


dIncreases exponentially


View Answer Decreases

Acceleration head in a reciprocating pump_______________________?


aIncreases the work done during delivery stroke


bDecreases the work done during suction stroke


cDoes not change the work requirement of the pump


dIncreases the work done during suction stroke



In case of a ____________ the energy of flow is considerably decreased downstream of the machine?


aBlower


bTurbine


cCentrifugal pump


dCentrifugal fan


View Answer Turbine

The normal stress is the same in all directions at a point in a fluid, when the fluid is__________________?


aNon-viscous


bIncompressible


cBoth A. and B.


dHaving no motion of one fluid layer relative to the other



A pipe is defined as ‘hydraulically smooth’, if the friction factor_________________?


aIs not a function of Reynolds number


bFor a given Reynolds number remains constant even on further smoothening of the pipe


cIs zero irrespective of the Reynolds number


dNone of these



Dean number is concerned with the____________________?


aFluid-particle interaction


bFluid flow through helical pipes


cPower consumption in agitated vessels


dPsychrometry



The maximum delivery pressure of compressors can be upto _____________ atmospheres?


a10


b100


c250


d1000


View Answer 1000

In case of centrifugal fan or blower, the gas capacity varies as __________________?


aSpeed


b(Speed)2


c(Speed)3


d(Speed)0.5


View Answer Speed

The dimension of dynamic viscosity is__________________?


aML-1T-1


bL2T-1


cLT-2


dML-1T-2


View Answer ML-1T-1

Which of the following can be used for the direct measurement of volumetric flow rate of slurry ?


aVenturimeter


bOrificemeter


cRotameter


dPitot tube


View Answer Rotameter

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