Chemical Engineering MCQs

Page No. 21

Optimum reaction temperature in steam reforming of naphtha is ______________ °C?


a700 – 1000


b300 – 450


c1500-1700


d100-200


View Answer 700 – 1000

Neutral atmosphere is maintained in a/an ____________ furnace?


aCold rolled steel coil annealing


bOpen hearth


cSoaking pit


dWalking beam reheating



In calcium ammonium nitrate (CAN) fertiliser ____________________?


aNitrate nitrogen is quick acting


bAmmoniacal nitrogen is quick acting


cNitrate nitrogen is slower acting


dNone of these



The thermal efficiency of a steel slab reheating furnace (walking beam type) may be about ____________ percent?


a15


b40


c70


d85


View Answer 40

Catalyst used in desulphurisation of naphtha is____________________?


aCo-Mo


bPt-Rh


c Silica gel


dNickel


View Answer Co-Mo

Pick out the correct statement?


aLike internal energy and enthalpy, the absolute value of standard entropy for elementary substances is zero


bMelting of ice involves increase in enthalpy and a decrease in randomness


cThe internal energy of an ideal gas depends only on its pressure


dMaximum work is done under reversible conditions



Steam reforming of naphtha is a source of hydrogen production for nitrogenous fertiliser industry. What is the usual ratio of steam to carbon maintained in the process of steam reforming of naphtha ?


a1.5 : 1


b3.5 : 1


c 10 : 1


d15 : 1


View Answer 3.5 : 1

In low or standard frequency induction furnace, heat is produced by the_______________________?


aCombination of induced current and skin effect


bInduction and resistance


cCurrent flow through a heating element


dNone of these



Which of the following set of conditions is favourable for the maximum yield of ammonia by Haber’s process ?


aHigh pressure, low reactants concentration, high temperature


bHigh pressure, low reactants concentration, low temperature


c High pressure, high reactants concentration, low temperature


dLow pressure, high reactants concentration, low temperature



The rate of scaling of furnace stock depends upon the_________________?


aTemperature


bTime


cNature of atmosphere


dAll A., B. and C.


View Answer All A., B. and C.

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