Chemical Engineering MCQs

Page No. 286

Fuel combustion is never cent per cent efficient due to___________________?


aIncomplete combustion


bDry gas/stack gas loss gas/stack gas loss


cMoisture loss


dAll A., B. and C.


View Answer All A., B. and C.

A coal with high _____________ content, would ignite most easily?


aFixed carbon


bVolatile matter


cAsh


dOxygen


View Answer Volatile matter

Which of the following fuel gases will require maximum amount of air for combustion of 1 Nm3 gas ?


aBlast furnace gas


bNatural gas


cProducer gas


dWater gas


View Answer Natural gas

High ash containing coke____________________?


aProduces more slag when used in the blast furnace


bHas poor strength and abrasion resistance


cIs desirable in producer gas manufacture


dNone of these



Low temperature oxidation of coal resulting from bad storage conditions does not decrease its______________________?


aCaking power


bCalorific value


cHydrogen content


dOxygen content


View Answer Oxygen content

Bright coal__________________?


aContains more than 90% durain


bContains more than 90% fussain


cContains mainly vitrain & clarain and is generally coking


dIs non-coking



A certain thickness of the coal, if stored unscientifically on soft (katcha) ground having no metallic/concrete flooring gets sunked into the ground, which is termed as the ‘carpet loss’. The carpet loss may be of the order of ______________ cms?


a1 to 2


b3 to 4


c5 to 15


d20 to 40


View Answer 5 to 15

A fuel with high heat release rate will_________________?


aRequire smaller combustion chamber


bHave high calorific value


cHave high adiabatic flame temperature


dNone of these



The pyrogallol solution used in Orsat apparatus can absorb_________________?


aOnly O2


bBoth O2 and CO2


cBoth O2 and CO


dAll CO, CO2, and O2


View Answer Both O2 and CO2

In low temperature carbonisation of coal as compared to high temperature carbonisation _____________ produced is less?


aDifference in gross & net calorific value of the coke oven gas


bFree carbon content in tar


cYield percentage of coke


dYield of ammonia present in coke oven gas



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