Chemical Engineering MCQs

Page No. 310

A carbonaceous fuel (containing no H2 or hydrocarbons) is burnt and the resulting flue gas contains 21% CO2. It means that___________________?


a21% excess air has been used for combustion


b21% excess oxygen has been used for combustion


cComplete combustion of fuel has taken place


dNo excess air has been used for combustion



Percentage of methane in coke oven gas may be around _____________________?


a5


b15


c25


d50


View Answer 25

Gobar gas is produced by the _______________ of ‘gobar’ (cow dung) ?


aHydrolysis


bFermentation


cOxidation


dDehydration


View Answer Fermentation

Atomising steam to fuel oil ratio in a burner should be around__________________?


a0.5


b1.5


c2.5


d3.5


View Answer 0.5

The maximum adiabatic flame temperature is attained, when the fuel is burnt with ______________________?


aTheoretically required amount of air


bMore than theoretically required amount of air


cLess than theoretically required amount of air


dTheoretically required amount of oxygen



Volatile matter content in coking coal may be about _____________ percent?


a1


b7


c22


d46


View Answer 22

With increase in the temperature of carbonisation of coal ___________________?


aHydrogen content of coke oven gas increases due to cracking of hydrocarbons


bMethane content in the coke oven gas decreases and carbon monoxide content increases


cCalorific value of the coke oven gas decreases due to cracking of hydrocarbons which is not compensated by increase in CO & H2 content


dAll A., B. and C.


View Answer All A., B. and C.

The catalyst used in shift converter is _____________________?


aNickel


bVanadium


cSilica gel


dAlumina


View Answer Nickel

Calorific value of a typical dry anthracite coal may be around _____________ Kcal/kg?


a1000


b4000


c8000


d15000


View Answer 8000

Low temperature oxidation of coal during storage does not decrease its__________________?


aOxygen content


bCaking power


cCalorific value


dNone of these


View Answer None of these

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