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Biology 12 Ch-27 BIOLOGY AND HUMAN WELFARE- 55
1.
What is the precipitate produced by sewage treatment called?
Stump
Sludge
Slug
Stub
2.
What is sludge?
Microbes that produce light as well as clean sewage
Clean water produced by sewage treatment
Precipitate produced by sewage treatment
Microbes that produce electricity as well as clean sewage
3.
If sludge is fed into large container, conditions soon become?
Aneroid
Aeronaut
Aerobic
Anaerobic
4.
What should be the initial temperature, if sludge is fed to the enclosed tank?
35ᵒC
30ᵒC
20ᵒC
25ᵒC
5.
Sludge should be fed into?
Anaerobic swallower
Aerobic digesters
Anaerobic digesters
Aerobic swallower
6.
Which of the following in the waste materials digests organic compounds?
Monosaccharides
Amino acids
All of these
Fatty acids
7.
Which of the following in the waste materials digests organic compounds?
Xanthan
Butyric acid
Disaccharides
Fatty acids
8.
Which of the following in the waste materials digests organic compounds?
Xanthan
Disaccharides
Butyric acid
Monosaccharides
9.
Which of the following in the waste materials digests organic compounds?
Amino acids
Butyric acid
Disaccharides
Xanthan
10.
What is produced when other bacteria act upon by them?
Organic acids
Butyric acids
Both b and c
Alcohols
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