NFPA 25 Inspection, Testing, and Maintenance
NFPA 25 governs ITM of water-based systems after acceptance. The organizing concept is frequency: some tasks are weekly, some monthly, quarterly, semiannual, annual, or every five years. Candidates must know the common ones: gauges (monthly inspection), control valves (weekly/monthly inspection depending on type, annual full operation), alarm devices (quarterly or semiannual test), main drain flow test (annual), waterflow alarm test (quarterly), antifreeze solution testing (annual), and internal pipe inspection (every five years). Standpipe and hose systems, fire pumps, and private mains have their own tables.
The second concept is the distinction between inspection (visual), testing (operational), and maintenance (corrective action), and who may perform each. The third is impairment procedure: when a system is out of service, the impairment coordinator notifies the fire department, the building owner, and occupants, and implements a fire watch or other compensating measures.
Traps: confusing inspection frequency with test frequency; assuming a gauge reading is a test; forgetting that a failed main drain test indicates a supply or valve problem, not a sprinkler problem; and missing the requirement to tag and record. Questions also test that the owner is responsible for ITM even when a contractor performs it.
Worked example: during a quarterly waterflow alarm test, the alarm does not sound. The correct response is to treat the system as impaired for alarm function, notify per the impairment procedure, and repair - not to wait for the annual test. Record the deficiency and the corrective action in the ITM record.