Chemical Engineering MCQs

Page No. 25

A phosphatic fertiliser contains 16% P2O5. It could be________________?


aDicalcium phosphate


bSuperphosphate


c Triple superphosphate


dNone of these


View Answer Superphosphate

Pick out the wrong statemen?


aHardening makes the steel more brittle


bHigh alloy steels contain more than 50% alloying element


c18/8 stainless steel is a magnetic steel


dBoth B. and C.


View Answer Both B. and C.

Reaction of ortho-phosphoric acid with phosphate rock produces _________________?


a Superphosphate


bTriple superphosphate


cMeta-phosphoric acid


dMonoammonium phosphate


View Answer Triple superphosphate

In producer gas making furnace, steam is added along with air to mainly control the____________________?


aFusion of coal ash & clinker formation


bC. V. of producer gas


cTemperature of producer gas


dTar content in producer gas



Biuret formation in urea is kept at minimum (< 1 %), because it is___________________?


aCorrosive in nature


b Toxic and harmful to some crops


cHelpful in decomposition of urea


dExplosive in nature



Pick out the wrong statement ?


aAlloys are harder than their component elements


bPresence of silicon in steel decreases its electrical resistance


cKarbate is an acid resistant material of construction


dNichrome, a steel alloyed with 10% Ni and 20% Cr can be used upto a temperature of 1100°C



Pick out the wrong statement ?


aTin can be readily and very easily drawn into very fine wire


bTin can be severely cold worked without the necessity of annealing due to its low recrystallisation temperature


cTin exists in two allotropic forms


dThe predominant use of tin is in the form of coating for steel & copper alloys



Effectiveness of a fertiliser is independent of the ___________________?


aNature of soil


bType of crop


cpH of soil


dNone of these


View Answer None of these

In a heating process, a heat flow diagram in which the quantities of heat in the various items of a heat balance are represented by the width of a band is called the__________________?


aOstwald chart


bCox chart


cSankey diagram


dNone of these


View Answer Sankey diagram

Presence of SO2 in furnace gases attacks the ferrous metal by way of_________________?


aAccelerating the rate of scaling


bCausing metal embrittlement


cAttacking the grain boundaries; particularly severe on low carbon and nickel bearing steels at high temperature


dAll A., B. and C.


View Answer All A., B. and C.

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