Chemical Engineering MCQs

Page No. 19

Two gas based fertiliser plants are located in India are_________________?


aMaharashtra and Gujarat

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bMaharashtra and Orissa

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cGujarat and Madhya Pradesh

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dJharkhand and Chhattisgarh

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Pick out the correct statement?


aFanning friction factor is inversely proportional to Reynolds number always

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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

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cMach number in an incompressible fluid is always unity

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

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


a1-2

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b15-25

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c40-45

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d60-65

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View Answer 15-25

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


aSize of the furnace

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bGas velocity in furnace

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cRatio of wall surface to surface of stock

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dNone of these

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View Answer None of these

P2O5 content in triple superphosphate is about ______________ percent?


a 42-50

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b15-20

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c85-90

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d70-75

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View Answer 42-50

Circulation of gases in furnace is caused by the_________________?


aChange in volume during a change of temperature

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bDifference in density between hot and cold gases

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cFurnace pressure in conjunction with draft in flues

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dAll A., B. and C.

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View Answer All A., B. and C.

_____________ is not a fertiliser?


aCalcium ammonium nitrate

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bFerrous sulphate

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cLiquid ammonia

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dAmmonium sulphate

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View Answer Ferrous sulphate

Which is not accomplished in an underfired furnace ?


aIncrease in heating capacity/m2 of floor space

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bElimination of cold spot at the bottom of the charge

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cReduction in the temperature of furnace gases

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dProtection of the periphery of the charge from excessive radiation

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Urea is represented as______________________?


aNH2.CO.NH2

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bNH3CO.CH3

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c NH.CO2.NH

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dNH3.CO2.NH3

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View Answer NH2.CO.NH2

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


aOxidation/scaling

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bDecarburising

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cSulphur penetration

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dEither of the above

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View Answer Either of the above

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