Exercise: Water Treatment

Questions for: Water Treatment

The purest form of naturally occurring water is
A:
rain water
B:
river water
C:
pond water
D:
well water
Answer: A
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From the following sanitizers which one comes under category of surface active agents?
A:
Tetra phosphate
B:
Teepol
C:
Meta phosphate
D:
None of these
Answer: B
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The maximum desirable limit (BIS of mercury in the drinking water is
A:
0.05 mg/l
B:
0.9 mg/l
C:
0.1 mg/l
D:
0.001 mg/l
Answer: D
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Temporary hardness of water may be removed by adding
A:
calcium hydroxide
B:
calcium carbonate
C:
calcium chloride
D:
sodium bicarbonate
Answer: A
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Lagoons may be characterized as
A:
anaerobic
B:
facultative
C:
aerated
D:
all of these
Answer: D
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