Which gauge has a yellow arc indicating 1200 to 1350 psi?

Which gauge has a yellow arc indicating 1200 to 1350 psi?

• A. Oxygen pressure gauge
• B. Hydraulic pressure gauge
• C. Nitrogen pressure gauge
• D. Fuel pressure gauge

Answer: (C)

Gauge color-coding shows what range is acceptable versus needing attention. For the nitrogen pressurization system on the Beechjet 400A, the yellow arc from 1200 to 1350 psi marks a caution range: the nitrogen supply is getting low and should be checked or serviced before it drops further. This is specific to the nitrogen pressure gauge, whose normal operating range sits above this caution band. The other gauges (oxygen, hydraulic, fuel) have different normal ranges and color cues, so their arcs don’t use this 1200–1350 psi yellow band.

Gauge color-coding shows what range is acceptable versus needing attention. For the nitrogen pressurization system on the Beechjet 400A, the yellow arc from 1200 to 1350 psi marks a caution range: the nitrogen supply is getting low and should be checked or serviced before it drops further. This is specific to the nitrogen pressure gauge, whose normal operating range sits above this caution band. The other gauges (oxygen, hydraulic, fuel) have different normal ranges and color cues, so their arcs don’t use this 1200–1350 psi yellow band.