Private Pilot : 2007年 Airman Knowledge Test Question (Written Exam)541.When operating an aircraft at cabin pressure altitudes above 12,500 feet MSL up to and including 14,000 feet MSL, supplemental oxygen shall be used during A) the entire flight time at those altitudes. B) that flight time in excess of 10 minutes at those altitudes. C) that flight time in excess of 30 minutes at those altitudes. 室内の気圧高度が12,500〜14,000 feet MSLを飛行する際、Supplemental Oxygen (予備酸素?)が必要なのは CabinのPressure Altitudeが12,500〜14,000 feet MSLを飛行する際、Supplemental Cabin Pressure Altitude 機内の気圧高度。 与圧式の航空機なら、実際の高度よりもかなり低くなる。 室内の人間が感じる高度。
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