Aeration of water is done to remove
A. odour
B. colour
C. bacterias
D. hardness
Answer: Option A
A. odour
B. colour
C. bacterias
D. hardness
Answer: Option A
The fire demand of a city may be worked out by
A. Kuichling’s formula
B. Freeman formula
C. Bustan’s formula
D. All the above
Mathamoglobinemia or blue baby disease is caused due to
A. Chlorides
B. Nitrites
C. Nitrates
D. Sulphides
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