During testing of CO2 agent, what must occur?

During testing of CO2 agent, what must occur?

• A. Lockout must occur
• B. Power must be increased
• C. Alarm must be silenced
• D. Valve must be opened

Answer: (A)

During testing of a CO2 agent, the essential safety step is to isolate the release path so the agent cannot discharge. This is achieved by applying a lockout (often with a tag) to the release controls, which prevents the CO2 system from actuating during the test. The lockout keeps the discharge valve closed and disables the release circuitry, protecting occupants and allowing testing of detectors, alarms, and sequencing without risk of releasing gas. Increasing power isn’t part of the testing action, silencing alarms could hide real hazards, and opening a valve would release CO2 intentionally. So, lockout must occur.

During testing of a CO2 agent, the essential safety step is to isolate the release path so the agent cannot discharge. This is achieved by applying a lockout (often with a tag) to the release controls, which prevents the CO2 system from actuating during the test. The lockout keeps the discharge valve closed and disables the release circuitry, protecting occupants and allowing testing of detectors, alarms, and sequencing without risk of releasing gas. Increasing power isn’t part of the testing action, silencing alarms could hide real hazards, and opening a valve would release CO2 intentionally. So, lockout must occur.