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Question 1
What is the approximate volumetric composition of dry air in the lower atmosphere (troposphere)?
Correct Answer:
78% Nitrogen, 21% Oxygen, and 1% Argon, Carbon Dioxide, and trace gases
Question 2
According to Dalton's Law of Partial Pressures, if atmospheric pressure at 18,000 ft is 506 hPa, what is the partial pressure of oxygen (PO2) in dry ambient air at this altitude?
Correct Answer:
Approximately 106 hPa
Question 3
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?
Correct Answer:
It will expand to approximately 200 mL (double its original volume)
Question 4
Which gas law explains why dissolved nitrogen comes out of solution in body tissues to form bubbles during a rapid ambient pressure drop, causing Decompression Sickness (DCS)?
Correct Answer:
Henry's Law
Question 5
What type of hypoxia is caused by a reduced partial pressure of oxygen in inspired air, preventing adequate oxygen transfer across the alveolar membrane?
Correct Answer:
Hypoxic Hypoxia (Altitude Hypoxia)
Question 1
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About this Exam

Prepare with the SACAA CPL Human Performance Practice Questions - SACAA Commercial Pilot Licence (Aeroplane) Human Performance & Limitations Examination Exam practice quiz. This question bank includes 100 questions covering pilot, visual, illusion, pressure, and oxygen. Use it to review important concepts, identify knowledge gaps, and build confidence for the related exam, course, or assessment.

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

This practice set contains 100 questions from the matching question bank and focuses on pilot, visual, illusion, pressure, and oxygen. Work through each question carefully, review the provided solutions, and revisit topics that need more study before your next attempt.

This is an independent study resource intended for practice and review; it is not an official examination or an endorsement by any organization named in the title.

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