Chemical Engineering MCQs

Page No. 20

Reaction of ortho-phosphoric acid with soda ash produces______________?


aSodium Tributyl phosphate (STPP)

✓


bTricresyl phosphate

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cTributyl phosphate

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dNitrophosphate

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Regenerators as compared to recuperators for the same duty_________________?


aStore smaller quantity of waste heat

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bAre lighter & compact

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cInvolve higher initial cost

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dAll A., B. & C.

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Phosphatic fertilisers_________________?


aAre useful during early stage of the plant growth

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bAccelerate fruit formation in later stages of growth

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cLessen the effect of excessive nitrogen application

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dNone of these

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Pick out the wrong statement about cavitation?


aSudden reduction of pressure in a fluid flow system caused by flow separation, vortex formation or abrupt closing of valve leads to cavitation

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bCavitation may be caused due to boiling of liquid by decreasing the pressure resulting in formation & collapse of vapor cavities

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cCavitation begins at higher static pressure and lower velocity in larger diameter pipelines resulting in audible noise

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dLarge scale cavitation cannot damage pipeline, restrict fluid flow and damage steam turbine blades

✓



Dampers are located__________________?


aBefore the I.D fan

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bAfter the I.D. fan

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cNear the top of the chimney

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dAnywhere after the I.D. fan

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View Answer Before the I.D fan

Which is the best fertiliser for paddy ?


aAmmonium sulphate

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bNitro-phosphate

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cSuperphosphate

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d Potassium nitrate

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View Answer Ammonium sulphate

The resistance furnace produces heat by the__________________?


aElectric arc struck between electrodes and the charge

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bFlow of current through a heating element

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cCombination of induced current and skin effect

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dNone of these

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Action of phosphoric acid on rock phosphate produces_________________?


aSuperphosphate

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bTriple superphosphate

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cNitrophosphate

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dDiammonium phosphate

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View Answer Triple superphosphate

Thickness of stock does not affect the fuel economy of furnaces, if the material to be heated is of__________________?


aLow emissivity

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bHigh thermal conductivity

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cBoth A. and B.

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dNeither A. nor B.

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View Answer Both A. and B.

An example of indirectly heated furnace is the_________________?


aSoaking pit

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bMuffle furnace

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cReheating furnace

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dNone of these

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View Answer Muffle furnace

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