Water Distribution Systems MCQ with answer and solution

Concept

Water distribution networks are divided into zones to regulate pressure and ensure equitable water supply across varying elevations.

Step-by-step solution

1. Understand the purpose of dividing a water supply network into zones (pressure zones). 2. Analyze the options: fire protection depends on flow/hydrants, billing depends on meters, flow direction depends on valves/pipes, and pressure regulation is achieved by zoning. 3. Conclude that zoning primarily helps in pressure regulation.

Explanation

Zoning in a water distribution network divides the service area into distinct pressure zones. This helps in maintaining uniform and safe operating pressure throughout the network, avoiding excessively high pressures in low-lying areas and low pressures in elevated areas.

Why the other options are wrong

A: Fire protection is managed by adequate pipe sizing and hydrants. C: Billing is handled by individual water meters installed at consumer connections. D: Flow direction is governed by pipe layout and control valves.

Shortcut

Think 'Zoning = Pressure Zones' in water distribution.

Common mistake

Confusing zoning with metering or billing districts.