What is the major function of a water distribution system?
- ATo carry water from the source to the filtration unit
- BTo carry water from the source to the pump house
- CTo carry water from individual homes to the treatment plant
- DTo carry water from the treatment plant to individual homesCorrect
Solution
Concept
A distribution system carries treated water from the treatment plant or service reservoir to consumers.
Step-by-step solution
1. Water supply has these parts: source, intake, conveyance, treatment, distribution. 2. Conveyance (transmission) mains carry raw water from the source to the treatment plant. 3. The distribution system starts after treatment. 4. It carries treated water to houses and other consumers. 5. So the answer is D.
Explanation
The water distribution system carries treated water from the treatment plant (or service reservoir) to individual homes. It has pipes, valves, reservoirs and pumps. Water from the source to the plant is conveyance, not distribution.
Why the other options are wrong
A: Source to filtration unit is conveyance or transmission, not distribution. B: Source to pump house is part of intake or conveyance. C: Water from homes to the treatment plant is sewage, carried by the sewerage system.
Shortcut
Distribution means treated water going to consumers.
Common mistake
Mixing up the conveyance (transmission) main with the distribution system.
Correct answer: D) To carry water from the treatment plant to individual homes