Which item is NOT part of the three conditions verified during a monthly external inspection of preaction and deluge valves?

• A. Electrical components are in service
• B. Trim valves are in the proper on and off positions
• C. Valve seat is not leaking
• D. Valve is lubricated

Answer: (D)

During monthly external inspections of preaction and deluge valves, the focus is on confirming external indicators and conditions that affect safe and reliable operation, not on performing lubrication. The three checks typically include verifying that electrical components are in service (so supervisory and alarm circuits are functioning), ensuring trim valves are in the proper on and off positions (so the system’s control valves are in expected states), and confirming that the valve seat is not leaking (external leakage could indicate a problem with sealing or packing). Lubrication, however, is a maintenance action that usually requires disassembly and the use of approved lubricants; it is not part of the routine monthly external inspection.