1. A water channel supported above the ground over trestles, is generally called
2. Sluice valves are fitted in a distribution system
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. One degree of hardness of water means a content of salts of
8. The prescribed hardness limit of potable water ranges between
9. The cast iron pipes for water supply system are used for
10. Rapid gravity filter can only remove turbidity of water upto
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