In the same situation, what is the second action?

In the same situation, what is the second action?

• A. Check that cylinder is fully opened
• B. Fully open purge valve
• C. Leave contaminated area immediately
• D. Call for help

Answer: (A)

Opening the air supply is essential before you rely on the SCBA. The cylinder valve must be opened fully to allow breathing air to reach the regulator; if it isn’t fully opened, airflow can be restricted and you can’t trust the system to deliver air when you need it. Making sure the cylinder is fully opened as the next step ensures the regulator has a reliable source of air and that the pressure readings reflect real supply. The purge valve is used to clear air from the facepiece after it’s donned, not as a readiness step, so opening it now would waste air and can mask a supply issue. Leaving the contaminated area immediately and calling for help are important safety actions, but they don’t establish the necessary air supply before proceeding with further steps.

Opening the air supply is essential before you rely on the SCBA. The cylinder valve must be opened fully to allow breathing air to reach the regulator; if it isn’t fully opened, airflow can be restricted and you can’t trust the system to deliver air when you need it. Making sure the cylinder is fully opened as the next step ensures the regulator has a reliable source of air and that the pressure readings reflect real supply. The purge valve is used to clear air from the facepiece after it’s donned, not as a readiness step, so opening it now would waste air and can mask a supply issue. Leaving the contaminated area immediately and calling for help are important safety actions, but they don’t establish the necessary air supply before proceeding with further steps.