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


b Excess liquid ammonia and compressed CO2 gas


cLiquid ammonia and excess compressed CO2


dCompressed ammonia gas and excess compressed CO2



Use of pulverised coal in boilers provides____________________?


aHigher calorific value


bBetter combustion


cSmokeless burning


dLess erosion on furnace wall


View Answer Better combustion

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


aEconomiser


bSteam superheater


cAir preheater


dAll A., B. and C.


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


b Potassic fertiliser


cPhosphatic fertiliser


dNone of these



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


aEconomiser


bRegenerator


cCeramic recuperator


dWaste heat boiler


View Answer Regenerator

Ammonium sulphate fertiliser is __________________?


a The highest concentration nitrogenous fertiliser


b The best fertiliser for paddy


cA basic fertiliser


d A neutral fertiliser



Pick out the wrong statement?


aThe vacuum pressure is always the negative gauge pressure


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


cManometric liquid should have high surface tension


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



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


aNitric acid


bAmmonia


cAmmonium nitrate


dNitric oxide


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


bIncrease in flame temperature


cReduction in scale losses


dSaving in fuel consumption



An example of a periodic furnace is the__________________?


aBlast furnace stoves


bBlast furnace


cCoke oven heating chamber


dRotary kilns


View Answer Blast furnace stoves

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