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

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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

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bInduction and resistance

✓


cCurrent flow through a heating element

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dNone of these

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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

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cNature of atmosphere

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dAll A., B. and C.

✓


View Answer All A., B. and C.

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