Chemical Engineering MCQs

Page No. 224

The length of the tube necessary for the boundary layer to reach the centre of the tube and for fully developed flow to be established is called the _____________ length?


aEquivalent


bTransition


cPrandtl mixing


dNone of these


View Answer Transition

With decrease in particle size to be fluidised by a particular fluid, the operating range of fluidisation velocity___________________?


aWidens


bSqueezes


cDoes not change


dUnpredictable from the data


View Answer Does not change

Differential manometer measures the___________________?


aAbsolute pressure


bGauge pressure


cPressure difference


dPressure gradient


View Answer Pressure difference

_____________________ pumps are a group of vacuum pumps ?


aHyster


bSump


cMono


dSubmerged


View Answer Hyster

The momentum correction factor for the velocity distribution of laminar flow is____________________?


a1.3


b1.66


c2.5


dNone of these


View Answer None of these

The frictional resistance in laminar flow does not depend on the_________________?


aArea of surface in contact


bFlow velocity


cFluid temperature


dPressure of flow



Steady non-uniform flow is exemplified by flow through a/an___________________?


aLong pipe at constant rate


bLong pipe at decreasing rate


cExpanding tube at increasing rate


dExpanding tube at constant rate



Pressure drop in a packed bed for laminar flow is given by the ______________ equation?


aKozeny-Carman


bBlake-Plummer


cLeva’s


dFanning friction factor


View Answer Kozeny-Carman

For an incompressible fluid, the bulk modulus of elasticity is____________________?


a5 kg/m3


b∞ N/m2


c1 N


d0 N/m


View Answer ∞ N/m2

The line of action of the buoyant force acts through the____________________?


aCentroid of the displaced volume of fluid


bCentre of gravity of a submerged body


cCentroid of the volume of any floating body


dNone of these



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