Chemical Engineering MCQs

Page No. 237

The distribution of shear stress in a stream of fluid in a circular tube is_____________________?


aLinear with radius for turbulent flow only


bLinear with radius for laminar flow only


cLinear with radius for both laminar & turbulent flow


dParabolic with radius for both laminar & turbulent flow



The ratio of actual discharge to theoretical discharge through an orifice is equal to______________?


aCc . Cv


bCc . Cd


cCv . Cd


dCd/Cv


View Answer Cc . Cv

The Prandtl mixing length is_________________?


aZero at the pipe wall and is a universal constant


bIndependent of radial distance from the pipe axis


cIndependent of the shear stress


dUseful for computing laminar flow problems



In hindered settling, the particles are_________________________?


aPlaced farther from the wall


bNot affected by other particles and the wall


cNear each other


dNone of these


View Answer Near each other

The component of acceleration resulting due to unsteady nature of flow is called ____________ acceleration?


aNormal


bLocal


cConvective


dTangential


View Answer Local

The actual velocity at vena-contracta for flow through an orifice from a reservoir is given by_____________________?


aCv . √(2gH)


bCc . √(2gH)


cCd . √(2gH)


dCv . Va


View Answer Cv . √(2gH)

Flow rate of high velocity flue gas discharged through a stack to the atmosphere can be most conveniently measured by a _________________?


aPitot tube


bManometer


cRotameter


dNone of these


View Answer Pitot tube

The losses in open channel flow generally vary as the ________________?


aInverse of the roughness


bFirst power of the roughness


cSquare of the velocity


dInverse square of hydraulic radius



The effect of solid boundary on the fluid flow is confined to the boundary layer, except for fluids ?


aHaving high viscosities


bMoving at low velocities


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Potential function is applicable only for __________ flow?


aIrrotational


bTurbulent


cSteady


dNone of these


View Answer Irrotational

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