Which of the following is not true about a gate valve?

____________ is used to measure flows to domestic buildings.

The size of the rainwater pipe commonly used in house drainage is _____

The pedestal type European water closet is also known as ____

Septic action is produced by the septic tank by ______

In the two-pipe system for the drainage of buildings, the discharge from the water closet is connected to the waste pipe…

One pipe system is cheaper than the single stack system for the drainage of buildings.

In a house drainage system, the pipe through which human excreta flows is called ______