Chemical Engineering MCQs

Page No. 66

Pick out the one which is not a chemical coagulant ?


aAluminium sulphate


b Ferrous sulphate


cHydrated lime


dChloramine


View Answer Chloramine

Presence of dissolved impurities of ______________ is responsible for the red brownish color of water?


a Carbonates


b Bi-carbonates


c Iron & manganese


d Arsenic


View Answer Iron & manganese

The concentration of water vapour in troposphere, which depends upon the altitude & temperature, varies in the range of zero to ______________ percent?


a1


b4


c8


d12


View Answer 4

Turbidity of water is an indication of the presence of__________________?


aSuspended inorganic matter


bDissolved solids


c Floating solids


dDissolved gases



‘Particulate’ air pollutants are finely divided solids and liquids. Which of the following is not a „particulate‟ ?


aDust & mists


b Smoke & fumes


c Photochemical smog & soot


dNone of these


View Answer None of these

During which of the following operating conditions of an automobile, carbon monoxide content in the exhaust gas is maximum ?


aIdle running


bAcceleration


cCruising


dDeceleration


View Answer Idle running

Carbon monoxide is a pollutant, which causes_________________?


aRespiratory disease (e.g. asthma)


bAsphyxiation (suffocation) leading to death


cRetardation in crop growth


dDamage to building materials like marble



Which of the following is the most detrimental for water used in high pressure boiler ?


aSilica


b Turbidity


c Phenol


dDissolved oxygen


View Answer Silica

Septic tanks are used for the ______________ of the deposited solids?


a Separation


bAnaerobic decomposition


cAerobic decomposition


dNone of these



Waste/polluted water discharged from electroplating, blast furnace and coal mining industries contain mainly _____________ substances?


aRadioactive


bOrganic


c Inorganic


dNone of these


View Answer Inorganic

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