Chemical Engineering MCQs

Page No. 280

Calorific value of gobar gas (containing CH4 = 60% , H2 = 10% ; CO2 = 30%) may be about ______________ Kcal/Nm3?


a1,800


b3,200


c5,400


d10,200


View Answer 5,400

Calorific value as determined by bomb calorimeter is the__________________?


aHigher calorific value at constant volume


bGross calorific value at constant pressure


cLower calorific value at constant pressure


dNet calorific value at constant volume



Which adsorbent is used for removing sulphur compounds (S Q, H2S, RSH etc.) removal from coke oven gas in by-products recovery plant ?


aSilica gel


bDiatomaceous earth


cBasalt


dBog iron (i.e., moist ferric hydroxide)



Which of the following fuels has the highest calorific value per unit mass (kcal/kg) ?


aCoal


bKerosene


cNatural gas


dFurnace oil


View Answer Furnace oil

Fusion point of coal ash generally varies from 1000 to 1700° C. Ash having fusion point less than _______________ °C is liable to form clinker?


a1100


b1250


c1350


d1400


View Answer 1100

The calorific value of natural gas is about ______________ kcal/Nm3?


a10,000


b2,500


c25,000


d35,000


View Answer 10,000

High amount of sulphur and phosphorous in coke causes ____________________ ?


aDecrease in its calorific value


bIncrease in its strength


cBrittleness of steel made by using it


dNone of these



A coal containing high amount of volatile matter will have__________________?


aLow ignition temperature


bVery little ash content


cHigh fusion point of its ash


dLow adiabatic flame temperature



Coke oven gas is a better fuel than blast furnace gas, because of its higher________________?


aCalorific value, cleanliness and relatively low distribution cost (due to its low specific gravity)


bAdiabatic flame temperature


cHeat release rate (thus requiring smaller combustion chamber)


dAll A., B. and C.


View Answer All A., B. and C.

Which of the following is not a micro component present in coal ?


aMicrinite


bClarain


cFusinite


dLiptinite


View Answer Clarain

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