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

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bTransition

✓


cPrandtl mixing

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dNone of these

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View Answer Transition

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


aWidens

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bSqueezes

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cDoes not change

✓


dUnpredictable from the data

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View Answer Does not change

Differential manometer measures the___________________?


aAbsolute pressure

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bGauge pressure

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cPressure difference

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dPressure gradient

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View Answer Pressure difference

_____________________ pumps are a group of vacuum pumps ?


aHyster

✓


bSump

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cMono

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dSubmerged

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View Answer Hyster

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


a1.3

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b1.66

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c2.5

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dNone of these

✓


View Answer None of these

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


aArea of surface in contact

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bFlow velocity

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cFluid temperature

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dPressure of flow

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


aLong pipe at constant rate

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bLong pipe at decreasing rate

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cExpanding tube at increasing rate

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dExpanding tube at constant rate

✓



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


aKozeny-Carman

✓


bBlake-Plummer

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cLeva’s

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dFanning friction factor

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View Answer Kozeny-Carman

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


a5 kg/m3

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b∞ N/m2

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c1 N

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d0 N/m

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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

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cCentroid of the volume of any floating body

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dNone of these

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