Chemical Engineering MCQs

Page No. 209

With increase in the ratio of orifice diameter to pipe diameter, the fraction of the orifice pressure differential that is permanently lost________________?


aIncreases

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bDecreases

✓


cRemains unchanged

✖


dIncreases exponentially

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View Answer Decreases

Acceleration head in a reciprocating pump_______________________?


aIncreases the work done during delivery stroke

✖


bDecreases the work done during suction stroke

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cDoes not change the work requirement of the pump

✓


dIncreases the work done during suction stroke

✖



In case of a ____________ the energy of flow is considerably decreased downstream of the machine?


aBlower

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bTurbine

✓


cCentrifugal pump

✖


dCentrifugal fan

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View Answer Turbine

The normal stress is the same in all directions at a point in a fluid, when the fluid is__________________?


aNon-viscous

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bIncompressible

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cBoth A. and B.

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dHaving no motion of one fluid layer relative to the other

✓



A pipe is defined as ‘hydraulically smooth’, if the friction factor_________________?


aIs not a function of Reynolds number

✖


bFor a given Reynolds number remains constant even on further smoothening of the pipe

✓


cIs zero irrespective of the Reynolds number

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dNone of these

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Dean number is concerned with the____________________?


aFluid-particle interaction

✖


bFluid flow through helical pipes

✓


cPower consumption in agitated vessels

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dPsychrometry

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The maximum delivery pressure of compressors can be upto _____________ atmospheres?


a10

✖


b100

✖


c250

✖


d1000

✓


View Answer 1000

In case of centrifugal fan or blower, the gas capacity varies as __________________?


aSpeed

✓


b(Speed)2

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c(Speed)3

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d(Speed)0.5

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View Answer Speed

The dimension of dynamic viscosity is__________________?


aML-1T-1

✓


bL2T-1

✖


cLT-2

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dML-1T-2

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View Answer ML-1T-1

Which of the following can be used for the direct measurement of volumetric flow rate of slurry ?


aVenturimeter

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bOrificemeter

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cRotameter

✓


dPitot tube

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View Answer Rotameter

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