A diesel fire pump test shall be conducted with flowing water.

A diesel fire pump test shall be conducted with flowing water.

• A. True
• B. False
• C. Not specified
• D. Always

Answer: (B)

Testing a diesel fire pump happens in stages, not all at once with water flowing. You start the engine and run the pump without water or with the discharge valve closed to confirm reliable starting, lubrication, cooling, and the governor/auto-start features work. Only after the unit is running do you introduce water to perform the performance test and verify it can deliver the required flow and pressure. Because some parts of the test are done dry to check the engine and pump operation, the claim that the test must always be conducted with flowing water isn’t accurate.

Testing a diesel fire pump happens in stages, not all at once with water flowing. You start the engine and run the pump without water or with the discharge valve closed to confirm reliable starting, lubrication, cooling, and the governor/auto-start features work. Only after the unit is running do you introduce water to perform the performance test and verify it can deliver the required flow and pressure. Because some parts of the test are done dry to check the engine and pump operation, the claim that the test must always be conducted with flowing water isn’t accurate.