Chemical Engineering MCQs

Page No. 298

Which of the following is the most reactive (as regards the formation of CO + H2 from C + H2O) ?


aBlast furnace coke


bLow temperature coke


cAnthracite coal


dSub-bituminous coal


View Answer Low temperature coke

Abel apparatus is used for those oils, whose flash points are ___________°F?


a< 120


b> 120


c> 280


d300-600


View Answer < 120

Assam (India) coals suffers mainly from the disadvantage of high ______________ content?


aAsh


bVolatile matter


cSulphur (4-6%)


dMoisture


View Answer Sulphur (4-6%)

High temperature in gasification of coal favours________________?


aHigh production of CO2


bLow production of CO2


cHigh production of CO


dBoth B. and C.


View Answer Both B. and C.

During its calorific value determination by bomb calorimeter, coal is combusted by _________________?


aAir


bOxygen


cOxygen enriched air


dNone of these


View Answer Oxygen

Kopper-Totzek coal gasifier_________________?


aCan give ammonia synthesis gas (H2 + N2)


bIs a moving bed reactor


cCannot use coking coal


dOperate at very high pressure



Pensky-Marten apparatus is used for those oils, whose flash points are _____________ °F?


a< 120


b> 120


c< 90


d90-110


View Answer > 120

The main product of high temperature carbonisation of coal is__________________?


aCoke


bAmmonia


cTar


dCoke oven gas


View Answer Coke

A coal having high amount of volatile matter____________________?


aWould require smaller combustion chamber


bProduces very little of tar and gas on carbonisation


cIgnites easily and burns with long smoky flame


dAll A., B. and C.


View Answer All A., B. and C.

Yield of charcoal in high temperature carbonisation of wood is about _____________ percent?


a10


b25


c50


d75


View Answer 25

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