Water Distribution Systems MCQ with answer and solution

Concept

The grid iron (interlaced) layout of mains and branches suits well-planned cities with rectangular streets.

Step-by-step solution

1. Layouts of distribution systems are: dead end (tree), grid iron, ring (circular) and radial. 2. In a grid iron system, all pipes are interconnected like a grid of rectangular streets. 3. It is suitable for a planned city with rectangular roads on fairly flat or gentle ground. 4. Answer is D.

Explanation

The grid iron system follows a rectangular street pattern, so it suits planned cities. Water reaches each point from more than one direction, so there are no dead ends.

Why the other options are wrong

A: Irregularly grown old towns suit the dead end (tree) system. B: Undulating topography is not a special requirement of the grid iron system. C: Radial roads suit the radial system.

Shortcut

Grid iron = planned city with rectangular roads. Old irregular town = dead end. Radial roads = radial system.

Common mistake

Students confuse the ring system and the radial system with the grid iron system.