SPC - Student Pilot Certificate Aeromedical Factors Questions and Answers 1 — Questions and Answers
Question 1: A pilot flying at 13,000 feet MSL for over 40 minutes without supplemental oxygen begins to experience a false sense of well-being and impaired judgment. Which aeromedical condition is the most likely cause?
- Hyperventilation
- Carbon monoxide poisoning
- Hypoxic hypoxia (Correct answer)
- Spatial disorientation
Correct answer: Hypoxic hypoxia
Hypoxic hypoxia is a state of oxygen deficiency in the body. It occurs at high altitudes where there is less partial pressure of oxygen. FAA regulations (14 CFR § 91.211) require flight crew to use supplemental oxygen for any portion of a flight over 30 minutes at cabin pressure altitudes between 12,500 and 14,000 feet. Symptoms like euphoria and impaired judgment are classic signs of the onset of hypoxia.
Question 2: During a stressful flight in turbulent conditions, a student pilot begins to breathe rapidly and feels light-headed with tingling in their fingertips. What is the most effective corrective action for these symptoms?
- Descend to a lower altitude immediately
- Consciously slow the breathing rate, or talk or sing aloud (Correct answer)
- Increase the rate of breathing to get more oxygen
- Request immediate assistance from air traffic control
Correct answer: Consciously slow the breathing rate, or talk or sing aloud
These are classic symptoms of hyperventilation, a condition caused by breathing too rapidly and expelling too much carbon dioxide. The proper response is to consciously control the breathing rate. Talking, singing, or breathing into a paper bag (if available) helps restore the proper carbon dioxide balance in the body.
Question 3: A pilot inadvertently flies into a cloud and loses all visual reference to the horizon. They feel a strong sensation of being in a left turn, but the attitude indicator shows the aircraft is in a slight right bank. The pilot should:
- Maneuver the aircraft to match the physical sensation they are feeling.
- Average the inputs from their body and the instruments to find a compromise.
- Execute a 180-degree turn to exit the cloud immediately.
- Trust the flight instruments and disregard the conflicting physical sensations. (Correct answer)
Correct answer: Trust the flight instruments and disregard the conflicting physical sensations.
This scenario describes spatial disorientation, a condition where a pilot's perception of their position and motion relative to the Earth is incorrect. In the absence of visual references, the vestibular system (inner ear) can be unreliable and create powerful false sensations. The correct and safe procedure is to rely entirely on the flight instruments.
Question 4: Which of the following is a primary symptom of carbon monoxide poisoning, which can result from a faulty aircraft cabin heating system?
- A bluish discoloration of the lips and fingernails
- Tingling sensations in the fingers and toes
- Headache, dizziness, and drowsiness (Correct answer)
- A sharp, acidic smell in the cockpit
Correct answer: Headache, dizziness, and drowsiness
Carbon monoxide (CO) is a colorless, odorless gas that, when inhaled, prevents the blood from carrying oxygen. Early symptoms often include headache, dizziness, and drowsiness. Bluish discoloration (cyanosis) is a sign of severe hypoxia, while tingling sensations are characteristic of hyperventilation.
Question 5: According to 14 CFR Part 91, a pilot is prohibited from acting as a crewmember of a civil aircraft within how many hours of consuming any alcoholic beverage?
- 12 hours
- 24 hours
- 4 hours
- 8 hours (Correct answer)
Correct answer: 8 hours
14 CFR § 91.17 states that no person may act as a crewmember of a civil aircraft within 8 hours after the consumption of any alcoholic beverage. The regulation also prohibits flying with a blood alcohol concentration of 0.04% or greater or while under the influence of alcohol.
Question 6: To avoid the risk of decompression sickness, what is the recommended minimum waiting period before flying to an altitude of 8,000 feet MSL after a scuba dive that did not require a controlled ascent?
- At least 12 hours (Correct answer)
- At least 4 hours
- At least 24 hours
- At least 8 hours
Correct answer: At least 12 hours
The Aeronautical Information Manual (AIM) recommends waiting at least 12 hours before flying to altitudes up to 8,000 feet after a scuba dive that did not require a controlled ascent (a non-decompression stop dive). For dives requiring a controlled ascent or for flights above 8,000 feet, the recommended waiting period is at least 24 hours.
SPC - Student Pilot Certificate Aeromedical Factors Questions and Answers 1
A pilot flying at 13,000 feet MSL for over 40 minutes without supplemental oxygen begins to experience a false sense of well-being and impaired judgment.
Which aeromedical condition is the most likely cause?