Urban and rural water-supply engineering typically includes which of the following integrated components?
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ACollection, conveyance, and treatment of source water
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BDistribution to consumers via mains, sub-mains, and branches
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CProvision of hydrants for fire-fighting coverage
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DAll of the above
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EOnly (a) and (b)
Answer
Correct Answer: All of the above
Explanation
Introduction / Context:Water-supply systems are end-to-end solutions that start at the source and terminate at the consumer, while also meeting firefighting and public safety needs. This question checks recognition of the complete scope of a standard water-supply scheme.
Given Data / Assumptions:
- Typical municipal or institutional water-supply scheme.
- Service levels include domestic, commercial, and fire-fighting demand.
Concept / Approach:A water-supply project normally encompasses: raw-water collection, transmission, treatment (clarification, filtration, disinfection), storage, and distribution networks (mains, sub-mains, service connections). Fire-fighting capability via hydrants is an integral design objective influencing pipe sizing, pressure zones, and storage volumes.
Step-by-Step Solution:
Identify core components: source to tap requires collection, conveyance, treatment.Distribution network design includes mains, sub-mains, and branches sized for peak and fire flows.Safety component: hydrants provide fire-fighting flows and pressures.Therefore, the complete answer is 'All of the above'.Verification / Alternative check:Standard design manuals specify hydrant spacing, minimum residual pressures, and storage for fire demand—integral to the system, not an addon.
Why Other Options Are Wrong:
- Any subset omits required elements for a fully functional and code-compliant system.
Common Pitfalls:
- Underestimating fire-flow requirements when sizing mains/reservoirs.
- Ignoring water quality management from source through distribution.
Final Answer:All of the above