Exercise: Water Treatment

Questions for: Water Treatment

Both temporary and permanent hardness of water can be removed on boiling water with
A:
calcium hydroxide
B:
sodium carbonate
C:
calcium oxide
D:
calcium carbonate
Answer: B
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Permanent hardness of water may be removed by the addition of
A:
lime
B:
soda ash
C:
potassium permagnate
D:
sodium bicarbonate
Answer: B
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The ultimate source of water is
A:
rivers and lakes
B:
dew and forest
C:
rain and snow
D:
underground and surface
Answer: C
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Sedimentation is a physical process used in wastewater treatment to
A:
remove particles that are less dense than water
B:
remove particles that are more dense than water
C:
remove the pertinacious material from the water
D:
none of the above
Answer: B
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The maximum permissible limit (BIS) of turbidity in drinking water is
A:
5 NTU
B:
10 NTU
C:
15 NTU
D:
20 NTU
Answer: B
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