What type of pressure in a system is indicated by water that is not moving?

Answer: A — Static

The type of pressure indicated by water that is not moving is static pressure. Static pressure refers to the pressure exerted by a fluid at rest within a closed system. This pressure is measured when there is no movement of the water, allowing a clear determination of the force exerted by the fluid regardless of any external influence. Static pressure is critical in various applications, particularly in fire protection systems, where ensuring adequate pressure in the system when not flowing can prevent issues like insufficient water supply during an emergency. Conversely, dynamic pressure relates to the pressure of fluid when it is in motion. It is influenced by flow speed and represents the energy due to the fluid's movement. The terms normal and operating pressure typically refer to pressures under specific conditions or settings but do not specifically address the state of the fluid's motion or rest. Thus, static pressure is the correct classification when assessing water in a non-moving state.