Chemical Engineering MCQs

Page No. 20

Reaction of ortho-phosphoric acid with soda ash produces______________?


aSodium Tributyl phosphate (STPP)


bTricresyl phosphate


cTributyl phosphate


dNitrophosphate



Regenerators as compared to recuperators for the same duty_________________?


aStore smaller quantity of waste heat


bAre lighter & compact


cInvolve higher initial cost


dAll A., B. & C.



Phosphatic fertilisers_________________?


aAre useful during early stage of the plant growth


bAccelerate fruit formation in later stages of growth


cLessen the effect of excessive nitrogen application


dNone of these



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


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


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


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



Dampers are located__________________?


aBefore the I.D fan


bAfter the I.D. fan


cNear the top of the chimney


dAnywhere after the I.D. fan


View Answer Before the I.D fan

Which is the best fertiliser for paddy ?


aAmmonium sulphate


bNitro-phosphate


cSuperphosphate


d Potassium nitrate


View Answer Ammonium sulphate

The resistance furnace produces heat by the__________________?


aElectric arc struck between electrodes and the charge


bFlow of current through a heating element


cCombination of induced current and skin effect


dNone of these



Action of phosphoric acid on rock phosphate produces_________________?


aSuperphosphate


bTriple superphosphate


cNitrophosphate


dDiammonium phosphate


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


bHigh thermal conductivity


cBoth A. and B.


dNeither A. nor B.


View Answer Both A. and B.

An example of indirectly heated furnace is the_________________?


aSoaking pit


bMuffle furnace


cReheating furnace


dNone of these


View Answer Muffle furnace

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