Chemical Engineering MCQs

Page No. 287

Percentage of nitrogen in blast furnace gas may be around__________________?


a5


b25


c55


d80


View Answer 55

During coking of coal, the ash content (percentage)________________?


aIncreases


bDecreases


cRemain constant


dNone of these


View Answer Increases

Stack (chimney) height in a big thermal power plant is dictated by the___________________?


aPollution control aspect


bDraught to be created


cLimitation of constructional facilities


dNone of these


View Answer Draught to be created

The lowest temperature, at which a solid fuel produces enough vapors to support continuous combustion, is called ?


aFire point


bSmoke point


cBurning temperature


dKindling temperature


View Answer Burning temperature

Ash content in the coke produced from a coking coal having 20% ash may be around _____________ percent?


a6


b12


c18


d24


View Answer 24

The calorific value is the highest out of the following for__________________?


aProducer gas


bWater gas


cCoke oven gas


dBlast furnace gas


View Answer Coke oven gas

A coal having high ratio of volatile matter to fixed carbon as compared to a coal having low ratio of volatile matter to fixed carbon _________________?


aIs less liable to spontaneous combustion on storage


bIs more difficult to ignite and produces a shorter flame


cRequires smaller combustion space and less secondary air


dNone of these


View Answer None of these

Kopper-Totzek coal gasifier (installed in a coal based nitrogeneous fertiliser plant) employs a/an ______________ bed gasifier?


aEntrained


bMoving


cFixed


dFluidised


View Answer Entrained

Ionisation potential applied across the electrodes of electrostatic tar precipitator is around_____________________?


a230 V AC


b60 KV AC


c230 V DC


d60 KV DC


View Answer 60 KV DC

Coal tar (produced by high temperature carbonisation) is the main source of_________________?


aAromatic compounds


bAliphatic compounds


cParaffins


dOlefins


View Answer Aromatic compounds

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