Safety, Plans, and Jobsite Administration
This domain tests jobsite safety and administration: hazard controls, hot work, testing, submittals, and documentation. The exam favors practical sequences, such as flush before test and test before cover.
Safety controls
Use OSHA-based hazard assessment, PPE, fall protection, and excavation protections. Hot work requires a permit, fire watch, and clearance of combustibles. Lockout/tagout applies to pumps, valves, and electrical work. Keep access and egress clear, and protect sprinkler components during construction.
Plans and testing
Shop drawings and hydraulic calculations must be approved before installation. Coordinate sprinkler locations with ducts, lights, and structure. Flush underground and aboveground piping before hydrostatic testing. For a standard NFPA 13 system, hydrostatically test at 200 psi for two hours, or at the required higher pressure, with calibrated gauges. Record test pressure, duration, and result.
Worked example
A crew installs branch lines and wants to test immediately. The correct sequence is to flush the piping, install temporary caps, fill, purge air, and pressurize to 200 psi. Hold for two hours with no leakage or pressure drop beyond the allowed amount. If the gauge is uncalibrated or the test is done before flushing, the result is not credible; repeat after correction.
Traps
Testing before flushing; using air pressure where hydrostatic testing is required; skipping the hot work permit; covering work before inspection; and submitting calculations that do not match the approved plans.