Chemical Engineering MCQs

Page No. 187

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


a6


b 1


c7


d 10


View Answer 6

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


a0.5


b1


c1.5


d2


View Answer 2

Choking in case of pipe flow means that a___________________?


aSpecified mass flow rate cannot be achieved


bValve is closed in the line


cRestriction in flow cross-section area occurs


dNone of these



Average molecular weight of air is about ____________________?


a 21


b29


c23


d 79


View Answer 29

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


af1/4


b4f2


c2f1


df1/2


View Answer f1/4

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


aPoise


bStoke


ccm2/second


d None of these


View Answer Poise

Isotopes are atoms having the same _____________________?


aMass number


bNumber of neutrons


cAtomic mass


dNone of these


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


bBHP required by the pump


cHead of the liquid pumped


dAll A., B. and C.


View Answer All A., B. and C.

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


aViscous


bLaminar


cTurbulent


dTransition


View Answer Turbulent

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


aSolid


bLiquid


cGaseous


dNone of these


View Answer Liquid

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