Chemical Engineering MCQs

Page No. 290

The weathering index of a coal________________?


aGives an idea of the fusion temperature of ash


bIs related to its calorific value


cIs a measure of its size stability, when stored & exposed to weather


dIs a measure of its caking tendency



Blast furnace gas is a very poisonous gas because of its predominantly high _______________ content?


aH2O


bCO2


cCO


dCH4


View Answer CO

Stoichiometric combustion of 12 kg of carbon requires _____________ of oxygen?


a1kg mole


b22.4 Nm3


c32 kg


dAll A., B. and C.


View Answer All A., B. and C.

Adiabatic flame temperature of a fuel is dependent on the initial temperature of___________________?


aFuel


bAir


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Main constituents of Benzol are ____________________?


aBenzene, toluene & xylene


bTar & creosote


cAmmonia & phenol


dAnthracene & phenol



Gobar gas is produced by the ______________ of cow dung?


aFermentation


bOxidation


cHydrogenation


dNone of these


View Answer Fermentation

Hard pitch is used for making_____________________?


aPulverised fuel


bPerfumes


cInsecticides


dPlastics


View Answer Pulverised fuel

Undercharging of coal in the by-product coke ovens results in ____________________?


aDecrease in the c.v. of coke oven gas


bIncrease in its throughput


cIncrease in the c.v. of coke oven gas


dNo change in the c.v. of coke oven gas



Benzol is used_____________________?


aAs a motor fuel blend


bFor producing benzene, toluene & xylene by its distillation


cBoth A. & B.


dNeither A. nor B.


View Answer Both A. & B.

Pulverised coal used in boiler firing need not have____________________?


aLess moisture content


bHigh fusion point of its ash


cHigh bulk density


dLower ash content



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