12. The supply of oxygen to a pilot flying above 40,000 involved two critical problems

12. The supply of oxygen to a pilot flying above 40,000 involved two critical problems and those problems were… (Select Two) a. inboard mask leakage, which is air being leaked into the mask. The problem was solved by using a face seal b. outboard mask leakage or air being leaked out of the mask. The problem was solved by using a continuous flow of oxygen during inhalation and exhalation into the mask to prevent the outboard leakage c. keeping the mask sealed to the face. The problem was solve by employing a 3 mmHg safety pressure on inhalation to keep the mask sealed to the pilot’s face d. outboard mask leakage which is air being leaked out of the mask. The problem was solved by using a specially designed mask for the user

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