Chemical Engineering MCQs

Page No. 317

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


aYoung


bMature


cBoth A & B


dNeither A nor B


View Answer Both A & B

High excess air in combustion of fuels results in____________________?


aIncreased fuel consumption


bIncomplete combustion


cSmoky flame


dNone of these



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


aReactivity


bPorosity


cBulk density


dHardness & strength


View Answer Hardness & strength

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


aHydrogen


bCarbon monoxide


cAcetylene


dMethane


View Answer Acetylene

A good metallurgical coke___________________?


aShould have high porosity


bShould be brittle


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


dShould have low fusion point of its ash



The cuprous chloride used in orsat apparatus can absorb___________________?


aOnly CO


bBoth CO and CO2


cBoth CO and O2


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


bHydrocarbons


cHydrogen


dOxygen


View Answer Hydrocarbons

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


aCO (upto 65%) & CO2


bCO2 & H2


cCO & O2


dCO2 & O2


View Answer CO (upto 65%) & CO2

Highly caking coals_____________________?


aProduce weak coke


bProduce strong coke


cMay damage the coke oven walls during carbonisation


dBoth B. and C.


View Answer Both B. and C.

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


aNon-luminous


bLuminous


cYellow


dUnburnt gases


View Answer Non-luminous

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