1. One degree of hardness of water means a content of salts of
2. A water channel supported above the ground over trestles, is generally called
3. Mostly used coagulant, is
4. The best process of disinfection of public water supply, is by
5. The detention period for plain sedimentation water tanks, is usually
6. Pick up the correct statement from the following :
7. The prescribed hardness limit of potable water ranges between
8. Rapid gravity filter can only remove turbidity of water upto
9. Sluice valves are fitted in a distribution system
10. The cast iron pipes for water supply system are used for
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