Coincident draft in relation to water demand is based on?

OPSC Civil Services Pre 2011

⭕ (a) Peak hourly demand

⭕ (b) Maximum daily demand

⭕ (c) Maximum daily demand + fire demand

⭕ (d) Greater of (a) and (c)

Explanation: Coincident draft refers to the maximum water demand during fire-fighting conditions. It is calculated as:

• Coincident draft = Maximum daily demand + Fire demand
• This value is generally higher than peak hourly demand.
• Used in urban planning to ensure adequate water supply in emergencies.

Coincident Draft in Water Demand: MCQ Explanation

In water supply engineering, coincident draft is a critical parameter used during emergency water supply estimation. It includes both daily needs and additional firefighting demand.

Why Coincident Draft Matters?

• Helps in designing adequate storage and supply capacity.
• Essential for firefighting and peak demand scenarios.
• Recommended by standard urban water supply norms.

Conclusion:

The correct answer is Maximum daily demand + fire demand. Always consider coincident draft in city water planning and emergency preparedness.