If hydraulically most remote nozzle in a deluge system is not accessible, how shall the pressure readings be recorded?

• A. The next nearest nozzle shall be used for the pressure reading.
• B. The nozzle can be checked visually without taking a pressure reading.
• C. Pressure readings should be taken at the next two nearest nozzles.
• D. The riser should be used for the pressure reading

Answer: (B)

When confirming deluge system hydraulics, you want to verify that the most remote nozzle would operate correctly, but if that nozzle isn’t accessible for a pressure test, you cannot obtain a valid reading there. The appropriate approach is to perform a visual verification of that nozzle rather than forcing a pressure measurement at an inaccessible point. A visual check confirms the nozzle’s presence and condition, showing there’s no obvious obstruction or damage and that the system components are in the expected state for activation. Substituting readings at other locations or trying to measure at the riser does not reliably confirm the remote head’s condition, so a visual check is the correct approach when a pressure reading isn’t possible.