Chemical Engineering MCQs

Page No. 19

Two gas based fertiliser plants are located in India are_________________?


aMaharashtra and Gujarat


bMaharashtra and Orissa


cGujarat and Madhya Pradesh


dJharkhand and Chhattisgarh



Pick out the correct statement?


aFanning friction factor is inversely proportional to Reynolds number always


bThe property of a randomly packed bed (with raschig rings) is given by the ratio of the total volume to the volume of voids in the bed


cMach number in an incompressible fluid is always unity


dMach number is given by the ratio of the speed of the fluid to that of sound in the fluid under conditions of flow



Yield of elemental phosphorous from rock phosphate is about _____________ percent?


a1-2


b15-25


c40-45


d60-65


View Answer 15-25

Which of the following variables does not affect the furnace capacity ?


aSize of the furnace


bGas velocity in furnace


cRatio of wall surface to surface of stock


dNone of these


View Answer None of these

P2O5 content in triple superphosphate is about ______________ percent?


a 42-50


b15-20


c85-90


d70-75


View Answer 42-50

Circulation of gases in furnace is caused by the_________________?


aChange in volume during a change of temperature


bDifference in density between hot and cold gases


cFurnace pressure in conjunction with draft in flues


dAll A., B. and C.


View Answer All A., B. and C.

_____________ is not a fertiliser?


aCalcium ammonium nitrate


bFerrous sulphate


cLiquid ammonia


dAmmonium sulphate


View Answer Ferrous sulphate

Which is not accomplished in an underfired furnace ?


aIncrease in heating capacity/m2 of floor space


bElimination of cold spot at the bottom of the charge


cReduction in the temperature of furnace gases


dProtection of the periphery of the charge from excessive radiation



Urea is represented as______________________?


aNH2.CO.NH2


bNH3CO.CH3


c NH.CO2.NH


dNH3.CO2.NH3


View Answer NH2.CO.NH2

The purpose of controlling the furnace atmosphere is to prevent surface attack by__________________?


aOxidation/scaling


bDecarburising


cSulphur penetration


dEither of the above


View Answer Either of the above

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