Chemical Engineering MCQs

Page No. 66

Pick out the one which is not a chemical coagulant ?


aAluminium sulphate

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b Ferrous sulphate

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cHydrated lime

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dChloramine

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View Answer Chloramine

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


a Carbonates

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b Bi-carbonates

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c Iron & manganese

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d Arsenic

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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

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b4

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c8

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d12

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View Answer 4

Turbidity of water is an indication of the presence of__________________?


aSuspended inorganic matter

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bDissolved solids

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c Floating solids

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dDissolved gases

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


aDust & mists

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b Smoke & fumes

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c Photochemical smog & soot

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dNone of these

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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

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bAcceleration

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cCruising

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dDeceleration

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View Answer Idle running

Carbon monoxide is a pollutant, which causes_________________?


aRespiratory disease (e.g. asthma)

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bAsphyxiation (suffocation) leading to death

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cRetardation in crop growth

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dDamage to building materials like marble

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


aSilica

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b Turbidity

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c Phenol

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dDissolved oxygen

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View Answer Silica

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


a Separation

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bAnaerobic decomposition

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cAerobic decomposition

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dNone of these

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


aRadioactive

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bOrganic

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c Inorganic

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dNone of these

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View Answer Inorganic

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