Chemical Engineering MCQs

Page No. 18

The composition of fresh feed to the high temperature, high pressure urea autoclave is______________________?


a Excess liquid ammonia and liquefied CO2

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b Excess liquid ammonia and compressed CO2 gas

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cLiquid ammonia and excess compressed CO2

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dCompressed ammonia gas and excess compressed CO2

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Use of pulverised coal in boilers provides____________________?


aHigher calorific value

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bBetter combustion

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cSmokeless burning

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dLess erosion on furnace wall

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View Answer Better combustion

Waste heat from the outgoing flue gases in a thermal power plant is recovered by a/an_________________?


aEconomiser

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bSteam superheater

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cAir preheater

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dAll A., B. and C.

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View Answer All A., B. and C.

Which of the following fertilisers is needed for promoting the development of leaves and stems during early stages of plant growth ?


aNitrogenous fertiliser

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b Potassic fertiliser

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cPhosphatic fertiliser

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dNone of these

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Which of the following is not a continuous waste heat recovery equipment from the flue gases going out of furnace ?


aEconomiser

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bRegenerator

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cCeramic recuperator

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dWaste heat boiler

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View Answer Regenerator

Ammonium sulphate fertiliser is __________________?


a The highest concentration nitrogenous fertiliser

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b The best fertiliser for paddy

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cA basic fertiliser

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d A neutral fertiliser

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Pick out the wrong statement?


aThe vacuum pressure is always the negative gauge pressure

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bThe pressure of the liquid measured by a piezometer tube is the gauge pressure

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cManometric liquid should have high surface tension

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dThe point at which the resultant pressure on an immersed surface acts, is known as the centre of gravity

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Urea (a nitrogenous fertiliser) is produced from carbon dioxide and__________________?


aNitric acid

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bAmmonia

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cAmmonium nitrate

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dNitric oxide

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View Answer Ammonia

Which of the following advantages is not associated with the use of preheated air for combustion of a fuel in the furnace ?


aIncrease in calorific value of the fuel

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bIncrease in flame temperature

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cReduction in scale losses

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dSaving in fuel consumption

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An example of a periodic furnace is the__________________?


aBlast furnace stoves

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bBlast furnace

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cCoke oven heating chamber

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dRotary kilns

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View Answer Blast furnace stoves

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