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Botany MCQs for NEET — Practice Questions with Answers

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The treatment of waste water is done by

A. Heterotrophic microbes added after treatment B. Heterotrophic microbes added during treatment C. Heterotrophic microbes which are already present in the sewage D. Mixotrophic bacteria present in human excreta

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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Physical removal of particles in waste water treatment is carried out by

A. Filtration B. Sedimentation C. Both A and B D. Digesters

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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Floating debris is removed by

A. Sequential filtration B. Sedimentation C. Secondary Treatment D. Anaerobic digestion

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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Grit is composed of

A. Soil B. Small pebbles C. Both A and B D. Human excreta+ soil+ small pebbles

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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Removal of grit is carried out by

A. Sedimentation B. Filteration C. Primary digestion D. Secondary digestion

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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The result of sedimentation results in settled solids which is known as

A. Effluent B. Primary sludge C. Activator D. Both B and C

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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Effluent is formed in

A. Primary Settling tank B. Colony sewage C. Secondary Settling tank D. Both B and C

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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The Biological treatment of sewage is also known as

A. Secondary Treatment B. Primary Treatment C. Same treatment D. Floc treatment

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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In Biological treatment, the primary effluent is passed into

A. Large aeration tank B. Large anaerobic tank C. Small aerobic Chambers D. Large anaerobic Chambers

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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Flocs are

A. Masses of fungal Filaments associated with bacteria B. Masses of bacteria associated with fungal Filaments C. Masses of algae associated with fungal Filaments D. Masses of algae and bacteria

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Explanation

NCERT page number 184

10.3 Microbes In Sewage Treatment

Microbes In Human Welfare

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