What percentage of the zones shall be tested at the outlet most remote from the source by the verifier to complete the piping particulate test?

The correct answer is that 25% of the zones shall be tested at the outlet most remote from the source by the verifier to complete the piping particulate test. This percentage is a standard requirement set to ensure that a representative sample of the medical gas system's outlets is examined for particulate matter.

Testing at the most remote outlet is critical because it helps identify any issues that may arise within the system as gas travels from the source to the farthest point. If problems such as contamination or inadequate flow occur, these can directly impact patient safety and the efficacy of treatments delivered through these gas systems.

By targeting 25%, the protocol balances thoroughness with practicality. It ensures that a sufficient number of zones are assessed without necessitating excessive resources or time to perform tests on all outlets. This standard aligns with safety practices in medical gas installation and maintenance, facilitating regular checks that contribute to overall system reliability.