Question

question 50 which of the following statements is true about water flow and pressure in pipes in residential plumbing systems? the pressure is highest when there is no water flowing the pressure is highest at the outlet point of the pipe as more pressure is applied to a given pipe length with an open faucet at the end the flow rate will remain the same the flow rate in a pipe is greater close to the source than at the outlet the flow rate is usually measured in psi

Explanation:

In residential plumbing systems, pressure is highest when there is no water flowing as there is no frictional loss in the pipes. When water is flowing, friction in the pipes reduces the pressure. Also, pressure decreases along the length of a pipe due to friction and elevation changes, so the pressure at the outlet point of the pipe is lower than at the source. Flow rate is related to pressure and pipe characteristics, and is not simply greater closer to the source.

Answer:

The pressure is highest when there is no water flowing.