Chemical Engineering MCQs

Page No. 200

A gaseous mixture contains 14 kg of N2, 16 kg of O2 and 17 kg of NH3. The mole fraction of oxygen is__________________?


a0.16


b0.33


c0.66


d0.47


View Answer 0.33

A mono pump is a __________ pump ?


aCentrifugal


bPiston


cPositive acting rotary


dA group of vacuum



Vapor pressure of a solution is proportional to (where, Sv and St are mole fraction of solvent and solute respectively) ?


aSv


b1/St


cSt


d1/Sv


View Answer Sv

Water hammer is caused, when water flowing in a pipe is suddenly brought to rest by closing the valve. The extent of pressure thus produced due to water hammer depends on the___________________?


aPipe length


bFluid velocity in the pipe


cTime taken to close the valve


dAll A., B. and C.


View Answer All A., B. and C.

The value of gas constant ‘R’ is ______________ kcal/kg.mole.°C?


a 2.79


b1.987


c 3.99


dNone of these


View Answer None of these

If more than two branches of pipes are to be connected at the same point, then use a/an_________________?


aElbow


bUnion


cTee


dNone of these


View Answer Tee

In a binary liquid system, the composition expressed as _______________ is independent of the temperature & pressure?


a Kg of solute/kg of solvent


bKg-mole of solute/kg-mole of solvent


cKg-mole of solute/1000 kg of solvent


dAll A., B. & C.


View Answer All A., B. & C.

In fluid flow, the boundary layer separation cannot occur___________________?


aIn case of boundaries experiencing form drag


bAt points of abrupt changes in the flow directions


cIn laminar flow


dNone of these


View Answer None of these

Rotary vacuum pumps can reduce the absolute pressure to as low as __________ mm Hg ?


a1


b0.1


c0.01


d0.001


View Answer 0.01

Unit of mass velocity is___________________?


akg/m.hr


bkg/m2.hr


ckg/hr


d kg/m2


View Answer kg/m2.hr

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