Chemical Engineering MCQs

Page No. 739

The main aim behind cooling the digested chip at the bottom portion of the digestor by injecting cold black liquor is to___________________?


aAvoid mechanical weakening of fibre


bRemove lignin by way of crystallisation


cIncrease the cellulose content


dNone of these



Main product in calcium carbide-water reaction is___________________?


aCa(OH)2


bC2H2


cCO2


dCaCO3


View Answer C2H2

The yield of tar from high temperature carbonisation of dry coal is about _______________ percent?


a3


b12


c22


d0.3


View Answer 3

Permanent hardness of water can be removed by____________________?


aSimply boiling


bAdding alum


cPassing it through cation & anion exchangers


dAll (A), B. and (C)



Bitterns is a/an_________________?


aUnsaturated fat


bStarting material for the production of iodine


cBy-product of chlor-alkali industry


dNone of these


View Answer None of these

Nylon-66 is so named because the____________________?


aAverage degree of polymerisation of the polymer is 1966


bNumber of carbon atoms between two nitrogen atoms are 6


cNumber of nitrogen atoms between two carbon atoms are 6


dPolymer was first synthesised in 1966



Salt is added in the kettle during soap manufacture to separate ___________________?


aSoap from lye


bGlycerine from lye


cThe metallic soap


dThe unsaponified fat from soap


View Answer Soap from lye

Percentage of alcohol in beer may be around ______________________ percent?


a2-8


b18-23


c27-32


d1-4


View Answer 2-8

Fatty material used in soap making is _______________________?


aFatty acid


bFatty alcohols


cTallow


dDetergents


View Answer Tallow

The main use of activated carbon in water treatment is to control ___________________?


aBacterial growth


bTaste and odour


cTurbidity


dNone of these


View Answer Taste and odour

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