Chemical Engineering MCQs

Page No. 173

For flow through a venturi at a particular discharge, the correct relationships among heads at points X, Y, and Z are__________________?


ah1 > h2 < h3

✓


bh1 > h2 > h3

✖


ch2 < h1 < h3

✖


dh1 < h2 < h3

✖


View Answer h1 > h2 < h3

The discharge through a V-notch weir varies as___________________?


aH3/2

✖


bH1/2

✖


cH5/2

✓


dH2/3

✖


View Answer H5/2

When larger particles e.g., grains are subjected to fluidisation, the corresponding bed produced is termed as the _______________ bed?


aSpouted

✓


bSluggish

✖


cBoiling

✖


dTeeter

✖


View Answer Spouted

The Stoke’s stream function applies to the________________?


aIrrotational flow only

✖


bIdeal/non i viscous fluids only

✖


cCases of axial symmetry

✓


dNone of these

✖



When a fluid flows over a solid surface, the___________________?


aVelocity is uniform at any cross-section

✖


bVelocity gradient is zero at the solid surface

✓


cResistance between the surface & the fluid is lesser as compared to that between the fluid layers themselves

✖


dVelocity is not zero at the solid surface

✖



Interstage coolers are provided in a multistage compressor to____________________?


aSave power in compressing a given volume to a given pressure

✓


bCool the delivered air

✖


cAchieve the exact delivery pressure

✖


dNone of these

✖



The rate of change of moment of momentum represents the ______________ by the fluid?


aTorque applied

✓


bForce exerted

✖


cWork done

✖


dPower developed

✖


View Answer Torque applied

Boiler feed water pump is usually a ______________ pump?


aReciprocating

✖


bGear

✖


cMultistage centrifugal

✓


dDiaphragm

✖



Boundary layer separation occurs when the____________________?


aPressure reaches a minimum

✖


bCross-section of the channel is reduced

✓


cValve is closed in a pipeline

✖


dVelocity of sound is reached

✖



The ratio of inertial forces to gravity forces is called the ______________ number?


aMach

✖


bFroude

✓


cEuler

✖


dWeber

✖


View Answer Froude

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