Chemical Engineering MCQs

Page No. 187

If pH value of a solution is 8, then its pOH value will be ____________________?


a6

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b 1

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c7

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d 10

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View Answer 6

The ratio of width to depth for the most economical rectangular section in open channel flow is_________________?


a0.5

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b1

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c1.5

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d2

✓


View Answer 2

Choking in case of pipe flow means that a___________________?


aSpecified mass flow rate cannot be achieved

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bValve is closed in the line

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cRestriction in flow cross-section area occurs

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dNone of these

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Average molecular weight of air is about ____________________?


a 21

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b29

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c23

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d 79

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View Answer 29

If Blasius or Darcy friction factor is ‘f1’ then the Fanning friction factor is equal to____________________?


af1/4

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b4f2

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c2f1

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df1/2

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View Answer f1/4

Which of the following is not a unit of kinematic viscosity ?


aPoise

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bStoke

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ccm2/second

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d None of these

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View Answer Poise

Isotopes are atoms having the same _____________________?


aMass number

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bNumber of neutrons

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cAtomic mass

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dNone of these

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View Answer None of these

Consider a centrifugal pump having a specific impeller diameter, fixed impeller speed pumping a liquid of constant density at a particular discharge capacity. With decrease in the capacity of the pump, the _______________ decreases?


aNPSH required

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bBHP required by the pump

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cHead of the liquid pumped

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dAll A., B. and C.

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View Answer All A., B. and C.

When the pipe Reynold’s number is 6000, the flow is generally___________________?


aViscous

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bLaminar

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cTurbulent

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dTransition

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View Answer Turbulent

The heat capacity of most substances is greater for the _______________ state?


aSolid

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bLiquid

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cGaseous

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dNone of these

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View Answer Liquid

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