Q
The amount of oxygen consumed by the aerobic bacterias which cause the aerobic biological decomposition of sewage, is known_________________?
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A
A. Bio-chemical oxygen demand (b.o.d.)
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B
B. Dissolved oxygen (d.o.)
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C
C. Chemical oxygen demand (c.o.d.)
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D
D. None of these
Correct Answer:
B. B. Dissolved oxygen (d.o.)