The stone ware sewers

ANS:E - all the above.

The statement "The stone ware sewers" is incomplete, but assuming you're referring to stoneware sewer pipes, let's evaluate each option:

1. Are used for carrying sewage and drainage from houses: Stoneware sewer pipes are indeed used for carrying sewage and drainage from houses. They are durable and resistant to the corrosive effects of sewage, making them suitable for this purpose.
2. Are manufactured from clays and shales: Stoneware sewer pipes are typically manufactured from a mixture of clays and shales. These materials are processed and molded into the desired shape before firing.
3. After casting are dried and burnt at temperature 150°C, 700°C, and 1200°C: Stoneware sewer pipes undergo a firing process after casting to enhance their strength and durability. The firing process typically involves gradually increasing the temperature to around 1200°C. This high temperature firing helps to vitrify the clay, transforming it into a dense, durable ceramic material.
4. Are generally provided with a waterproof cover by vaporizing sodium chloride: This statement is not accurate. Stoneware sewer pipes are not typically provided with a waterproof cover by vaporizing sodium chloride. Instead, they rely on the inherent properties of the fired ceramic material to resist water penetration.

• Are used for carrying sewage and drainage from houses.
• Are manufactured from clays and shales.
• After casting are dried and burnt at temperature 150°C, 700°C, and 1200°C.