Chemical Engineering MCQs

Page No. 25

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


aDicalcium phosphate

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bSuperphosphate

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c Triple superphosphate

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dNone of these

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View Answer Superphosphate

Pick out the wrong statemen?


aHardening makes the steel more brittle

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bHigh alloy steels contain more than 50% alloying element

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c18/8 stainless steel is a magnetic steel

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dBoth B. and C.

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View Answer Both B. and C.

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


a Superphosphate

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bTriple superphosphate

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cMeta-phosphoric acid

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dMonoammonium phosphate

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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

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bC. V. of producer gas

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cTemperature of producer gas

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dTar content in producer gas

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


aCorrosive in nature

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b Toxic and harmful to some crops

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cHelpful in decomposition of urea

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dExplosive in nature

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Pick out the wrong statement ?


aAlloys are harder than their component elements

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bPresence of silicon in steel decreases its electrical resistance

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cKarbate is an acid resistant material of construction

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

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Pick out the wrong statement ?


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

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

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cTin exists in two allotropic forms

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

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Effectiveness of a fertiliser is independent of the ___________________?


aNature of soil

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bType of crop

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cpH of soil

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dNone of these

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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

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bCox chart

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cSankey diagram

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dNone of these

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View Answer Sankey diagram

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


aAccelerating the rate of scaling

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bCausing metal embrittlement

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

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dAll A., B. and C.

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View Answer All A., B. and C.

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