The correct answer is option B) Grid-iron system.

Explanation:

A water distribution system refers to the network of pipelines, valves, pumps, and storage facilities that are used to deliver potable water to residential, commercial, and industrial areas. There are different types of layouts or configurations for water distribution systems, each with its own advantages and disadvantages.

The interlaced system, also known as the grid-iron system, is one of the layouts used in water distribution systems. It is characterized by a network of interconnected pipelines that form a grid-like pattern. This system is commonly used in urban areas where the demand for water is high and the population density is also high.

Advantages of the interlaced system:

1. Redundancy: The interlaced system provides redundancy, meaning that if one pipeline or section of the system fails, there are alternative pathways for water flow. This helps to ensure a continuous supply of water to consumers and reduces the likelihood of service disruptions.

2. Equal pressure distribution: The interlaced system allows for equal pressure distribution throughout the network. This is important to ensure that all consumers receive water at an adequate pressure for their needs, such as for drinking, showering, and irrigation.

3. Flexibility: The grid-like pattern of the interlaced system allows for flexibility in the operation and maintenance of the system. It is relatively easier to isolate specific sections of the system for repairs or maintenance without affecting the entire network.

4. Expansion and growth: The interlaced system is well-suited for future expansion and growth. As new developments or areas are added to the network, new pipelines can be easily connected to the existing grid, ensuring a seamless integration of the new areas into the system.

Disadvantages of the interlaced system:

1. Complex design: The design and layout of the interlaced system can be more complex compared to other systems. It requires careful planning and coordination to ensure that the network is properly interconnected and balanced.

2. Higher cost: The interlaced system may involve higher initial costs due to the extensive network of pipelines and connections required. However, the long-term benefits and advantages of the system often outweigh the initial investment.

In conclusion, the interlaced system, also known as the grid-iron system, is a layout of a water distribution system that uses a grid-like pattern of interconnected pipelines. This system provides redundancy, equal pressure distribution, flexibility, and allows for future expansion and growth. While it may involve higher initial costs and a more complex design, the advantages of the interlaced system make it a preferred choice for urban areas with high water demand and population density.

B