SACAA CPL Human Performance Practice Questions - SACAA Commercial Pilot Licence (Aeroplane) Human Performance & Limitations Examination Exam

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Using Boyle's Law (P1 x V1 = P2 x V2), how will a trapped gas volume of 100 mL in a pilot's gastrointestinal tract at sea level (1013 hPa) expand if the aircraft climbs unpressurised to 18,000 ft where atmospheric pressure is 506 hPa?

It will expand to approximately 200 mL (double its original volume) It will expand to approximately 400 mL (quadruple its original volume) It will contract to approximately 50 mL (half its original volume) It will remain unchanged at 100 mL

Correct Answer:

It will expand to approximately 200 mL (double its original volume)

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