Chemical Engineering MCQs

Page No. 315

With increase in the oxygen content of the coal, its ______________ decreases?


aCalorific value


bCaking power


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Coal tar fuels (CTF) as compared to petroleum based fuel oils have higher __________________?


aCalorific value


bHigher C/H ratio


cSulphur content


dDifference in gross & net calorific value


View Answer Higher C/H ratio

Nitrogen present in the flue gas is determined in the Orsat apparatus by absorbing it in_____________________?


aKOH


bAmmoniacal cuprous chloride


cPyrogallol solution


dNone of these


View Answer None of these

Catalyst used in Fischer-Tropsch process is_______________?


aNickel


bZinc oxide


cAlumina


dThorium oxide


View Answer Nickel

Dry air required to burn 1 kg of carbon completely may be around ______________ kg?


a11


b2


c20


d38


View Answer 11

‘Fat coals’ are those coals which have very high____________________?


aCaking capacity


bVolatile matter content


cFusion point of its ash


dInherent moisture content


View Answer Caking capacity

With increase in C/H ratio of a fuel, the amount of CO2 formed on its complete combustion____________________?


aIncreases


bDecreases


cRemain same


dEither A. or B., depends on other factors


View Answer Increases

Wood charcoal is obtained by the destructive distillation of wood. It is used in the production of activated carbon, which is not used for the____________________?


aDecolourisation of sugar


bSolvent recovery from air and gases


cAbsorption of gases and vapor


dElectrode manufacture


View Answer Electrode manufacture

Advantages of fluidised bed combustion are ____________________?


aReduced NOx formation in flue gas


bLower furnace operating temperature


cHigh heat transfer rate


dAll A., B. & C.


View Answer All A., B. & C.

The main reason for making the copper calorimeter (used in bomb calorimeter) silvery white and shining/polished is to___________________?


aMinimise its corrosion


bAvoid radiation heat loss


cMake it look attractive


dNone of these



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