Chemical Engineering MCQs

Page No. 315

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


aCalorific value

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bCaking power

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cBoth A. & B.

✓


dNeither A. nor B.

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View Answer Both A. & B.

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


aCalorific value

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bHigher C/H ratio

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cSulphur content

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dDifference in gross & net calorific value

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View Answer Higher C/H ratio

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


aKOH

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bAmmoniacal cuprous chloride

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cPyrogallol solution

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dNone of these

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View Answer None of these

Catalyst used in Fischer-Tropsch process is_______________?


aNickel

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bZinc oxide

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cAlumina

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dThorium oxide

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View Answer Nickel

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


a11

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b2

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c20

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d38

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View Answer 11

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


aCaking capacity

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bVolatile matter content

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cFusion point of its ash

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dInherent moisture content

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View Answer Caking capacity

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


aIncreases

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bDecreases

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cRemain same

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dEither A. or B., depends on other factors

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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

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bSolvent recovery from air and gases

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cAbsorption of gases and vapor

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dElectrode manufacture

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View Answer Electrode manufacture

Advantages of fluidised bed combustion are ____________________?


aReduced NOx formation in flue gas

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bLower furnace operating temperature

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cHigh heat transfer rate

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dAll A., B. & C.

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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

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bAvoid radiation heat loss

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cMake it look attractive

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dNone of these

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