Chemical Engineering MCQs

Page No. 319

Mott and Wheeler test is conducted on coke to find its _____________________?


aReactivity with O2


bAbradability


cPhosphorus content


dVolatile matter content


View Answer Reactivity with O2

A coal having high volatile matter content will ________________?


aGive less yield of tar and gas on carbonisation


bBurn with a small non-smoky flame


cHave a very high calorific value


dNone of these


View Answer None of these

Combustion reaction of fuels is a/an ______________ reaction?


aAuto catalytic


bExothermic


cEndothermic


dNone of these


View Answer Exothermic

A fuel containing carbon and carbon monoxide (but containing no hydrogen or its compounds) is burnt in pure oxygen at constant pressure. Its gross calorific value as compared to net calorific value will be_________________?


aMore


bLess


cSame


dData insufficient; can’t be predicted


View Answer Same

Bomb calorimeter can be used to determine the _____________ of the coal?


aSulphur content


bCalorific value


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Largest constituent of coke oven gas is_________________?


aN2


bH2


cCH4


dCO2


View Answer H2

The maximum adiabatic flame temperature in air is _____________ the maximum flame temperature in pure oxygen?


aLower than


bHigher than


cSame as


dNot related to


View Answer Lower than

The main drawback of supplying more excess air in the combustion of fuel is the_________________?


aExcessive power requirement of air blower


bEnhanced sensible heat loss in the flue gas


cIntermittent and uncontrolled combustion of the fuel


dHigh exit flue gas temperature from the furnace



Bunsen burner is an example of a/an _____________ burner?


aInside mixing/premix type


bOutside mixing/diffusion flame/nozzle mix type


cRotary cup


dSubmerged combustion



Bulk density of pulverised coal may be about ______________ kg/m3?


a100


b500


c1000


d1500


View Answer 500

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