What should the pump discharge pressure rise by when all valves are closed, according to pressure control test standards?

• A. No more than 20 psi
• B. No more than 25 psi
• C. No more than 30 psi
• D. No more than 35 psi

Answer: (C)

When conducting a pressure control test, a key aspect is the rise in pump discharge pressure when all valves are closed. The standard dictates that this pressure must not exceed a specific limit to ensure that the system is functioning correctly and safely. A rise of no more than 30 psi indicates that the pump's pressure relief system is operating efficiently, preventing excessive pressure buildup that could compromise the integrity of the system or lead to mechanical failure.

If the discharge pressure were to rise significantly above this standard, it might suggest an issue with the pump or the associated plumbing, such as a blockage or malfunctioning pressure-relieving mechanisms. Thus, maintaining the rise to no more than 30 psi is critical for safe operational practices and adherence to testing standards.