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

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bLow temperature coke

✓


cAnthracite coal

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dSub-bituminous coal

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View Answer Low temperature coke

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


a< 120

✓


b> 120

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c> 280

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d300-600

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View Answer < 120

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


aAsh

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bVolatile matter

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cSulphur (4-6%)

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dMoisture

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View Answer Sulphur (4-6%)

High temperature in gasification of coal favours________________?


aHigh production of CO2

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bLow production of CO2

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cHigh production of CO

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dBoth B. and C.

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View Answer Both B. and C.

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


aAir

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bOxygen

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cOxygen enriched air

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dNone of these

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View Answer Oxygen

Kopper-Totzek coal gasifier_________________?


aCan give ammonia synthesis gas (H2 + N2)

✓


bIs a moving bed reactor

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cCannot use coking coal

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dOperate at very high pressure

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


a< 120

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b> 120

✓


c< 90

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d90-110

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View Answer > 120

The main product of high temperature carbonisation of coal is__________________?


aCoke

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bAmmonia

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cTar

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dCoke oven gas

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View Answer Coke

A coal having high amount of volatile matter____________________?


aWould require smaller combustion chamber

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bProduces very little of tar and gas on carbonisation

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cIgnites easily and burns with long smoky flame

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dAll A., B. and C.

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View Answer All A., B. and C.

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


a10

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b25

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c50

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d75

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View Answer 25

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