Chemical Engineering MCQs

Page No. 317

Very ______________ coals are completely devoid of cokability i.e., it is non-coking ?


aYoung

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bMature

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cBoth A & B

✓


dNeither A nor B

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View Answer Both A & B

High excess air in combustion of fuels results in____________________?


aIncreased fuel consumption

✓


bIncomplete combustion

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cSmoky flame

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dNone of these

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“Micum Index” of a coke is a measure of its___________________?


aReactivity

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bPorosity

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cBulk density

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dHardness & strength

✓


View Answer Hardness & strength

_____________ has the widest inflammability limit (explosion limit) of all the gases?


aHydrogen

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bCarbon monoxide

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cAcetylene

✓


dMethane

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View Answer Acetylene

A good metallurgical coke___________________?


aShould have high porosity

✓


bShould be brittle

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cMust contain moderate quantities of ash, moisture, sulphur and volatile matters

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dShould have low fusion point of its ash

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The cuprous chloride used in orsat apparatus can absorb___________________?


aOnly CO

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bBoth CO and CO2

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cBoth CO and O2

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dAll CO, CO2, and O2

✓


View Answer All CO, CO2, and O2

A gaseous fuel in order to develop luminosity on burning, must contain __________________?


aCarbon monoxide

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bHydrocarbons

✓


cHydrogen

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dOxygen

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View Answer Hydrocarbons

L.D. converter gas (produced in steel plant) comprises mainly of ___________________?


aCO (upto 65%) & CO2

✓


bCO2 & H2

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cCO & O2

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dCO2 & O2

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View Answer CO (upto 65%) & CO2

Highly caking coals_____________________?


aProduce weak coke

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bProduce strong coke

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cMay damage the coke oven walls during carbonisation

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dBoth B. and C.

✓


View Answer Both B. and C.

The hottest part of the flame lies in its _______________ zone?


aNon-luminous

✓


bLuminous

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cYellow

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dUnburnt gases

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View Answer Non-luminous

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