Below what bottle pressure does the CKPT OXY label display amber?

Below what bottle pressure does the CKPT OXY label display amber?

• A. 500
• B. 200
• C. 100
• D. 300

Answer: (B)

The indicator uses color to warn you about the oxygen supply level. When the cockpit oxygen bottle pressure is still sufficient, the CKPT OXY label stays in a normal color. Once the pressure falls to a low level, it changes to amber to alert you that the supply is running out and you should take action (check the system, be prepared to don oxygen, or switch to a reserve). The threshold for this amber indication is 200 psi, so below that pressure the amber warning appears. Higher pressures mean the oxygen is still ample, so no amber warning appears. Very low levels fall into a different, more urgent indication, but the amber cue specifically marks the low-but-not-empty range, which is why 200 psi is the correct cue.

The indicator uses color to warn you about the oxygen supply level. When the cockpit oxygen bottle pressure is still sufficient, the CKPT OXY label stays in a normal color. Once the pressure falls to a low level, it changes to amber to alert you that the supply is running out and you should take action (check the system, be prepared to don oxygen, or switch to a reserve). The threshold for this amber indication is 200 psi, so below that pressure the amber warning appears. Higher pressures mean the oxygen is still ample, so no amber warning appears. Very low levels fall into a different, more urgent indication, but the amber cue specifically marks the low-but-not-empty range, which is why 200 psi is the correct cue.