When using supplemental oxygen with mask retainers and streamers on the CRJ 700, what is the first step to start the oxygen flow?

When using supplemental oxygen with mask retainers and streamers on the CRJ 700, what is the first step to start the oxygen flow?

• A. Pull streamer firmly downward to start the flow of the oxygen and remove the mask from the mask retainer
• B. Push streamer upward to start the flow of the oxygen
• C. Open the oxygen valve
• D. Turn the oxygen knob clockwise

Answer: (A)

The key idea is that the passenger oxygen system on the CRJ 700 is activated by the streamer on the mask. Pulling the streamer downward opens the flow valve and frees the mask from the retainer, making it ready to wear. This is the first step because the system is designed for immediate activation simply by pulling the streamer; releasing the mask from the retainer ensures you can put it on and breathe the oxygen. Pushing the streamer upward, opening a valve, or turning a knob would not initiate flow in this setup, so they aren’t the correct first actions.

The key idea is that the passenger oxygen system on the CRJ 700 is activated by the streamer on the mask. Pulling the streamer downward opens the flow valve and frees the mask from the retainer, making it ready to wear. This is the first step because the system is designed for immediate activation simply by pulling the streamer; releasing the mask from the retainer ensures you can put it on and breathe the oxygen. Pushing the streamer upward, opening a valve, or turning a knob would not initiate flow in this setup, so they aren’t the correct first actions.