Chemical Engineering MCQs

Page No. 170

Slugging in a fluidised bed can be avoided by using_____________________?


aTall narrow vessel


bDeep bed of solids


cShallow beds of solids and proper choice of particle size


dVery large particles



Fluid flow in a/an ______________ is an example of pressure flow?


aPartially filled pipeline


bPipe


cOpen channel


dRiver


View Answer Pipe

Friction produced by the formation of wakes is called the ______________ friction?


aDisk


bSkin


cForm


dNone of these


View Answer Form

Reynolds number is the ratio of____________________?


aViscous forces to gravity forces


bInertial forces to viscous forces


cViscous forces to inertial forces


dInertial forces to gravity forces



Cd for the orifice plate varies from ___________________?


a0.58 to 0.8


b0.93 to 0.98


c0.2 to 0.3


d0.02 to 0.03


View Answer 0.58 to 0.8

What is the force required (in Newtons) to hold a spherical balloon stationary in water at a depth of H from the air-water interface? The balloon is of radius 0.1 m and is filled with air ?


a4πg/3


b0.01 πgH/4


c0.01 πgH/8


d0.04 πgH/3


View Answer 4πg/3

Which of the following factors does not contribute to the pressure drop in a pipeline ?


aVelocity of fluid


bSize of pipe


cLength of pipe and number of bends


dNone of these


View Answer None of these

Experimental study of laminar fluid flow through a circular tube was conducted by____________________?


aReynolds


bHagen and Poiseuille


cPascal


dBlake-Plummer


View Answer Hagen and Poiseuille

Hydraulic radius is the ratio of ____________________?


aWetted perimeter to flow area


bFlow area to wetted perimeter


cFlow area to square of wetted perimeter


dSquare root of flow area to wetted perimeter



Cocks are used to control ___________________?


aWater


bAny liquid


cSolids


dNone of these


View Answer Any liquid

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