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

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dNet calorific value at constant volume

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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

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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

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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

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dLow adiabatic flame temperature

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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

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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

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bClarain

✓


cFusinite

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dLiptinite

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View Answer Clarain

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