Human Performance And Limitations (L)

67 Questions | Total Attempts: 286

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Human Performance And Limitations (L)

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Questions and Answers
  • 1. 
    Which statement is true regarding alcohol in the human system?
    • A. 

      (1) Alcohol renders a pilot more susceptible to hypoxia.

    • B. 

      (2) Small amounts of alcohol will not impair flying skills.

    • C. 

      (3) Coffee helps metabolize alcohol and alleviates a hangover.

  • 2. 
    If advice is needed concerning possible flight with an illness, a pilot should contact
    • A. 

      (1) an Aviation Medical Examiner.

    • B. 

      (2) their family doctor.

    • C. 

      (3) the nearest hospital.

  • 3. 
    Which will always affect your ability to fly?
    • A. 

      (1) Over-the-counter analgesics and antihistamines.

    • B. 

      (2) Antibiotics and anesthetics drugs.

    • C. 

      (3) Prescription analgesics and antihistamines.

  • 4. 
    As a pilot, flying for long periods in hot summer temperatures increases the susceptibilityof dehydration since the
    • A. 

      (1) dry air at altitude tends to increase the rate of water loss from the body.

    • B. 

      (2) moist air at altitude helps retain the body┬┤s moisture.

    • C. 

      (3) temperature decreases with altitude.

  • 5. 
    Motion sickness is caused by
    • A. 

      (1) continued stimulation of the tiny portion of the inner ear which controls sense of balance.

    • B. 

      (2) an instability in the brain cells which affect balance and will generally be overcome with experience.

    • C. 

      (3) the movement of an aircraft causing the stomach to create an acid substance which causes the stomach lining to contract.

  • 6. 
    What suggestion could you make to your pilot fellow who is experiencing motionsickness?
    • A. 

      (1) Recommend taking medication to prevent motion sickness.

    • B. 

      (2) Lower her/his head, shut her/his eyes, and take deep breaths.

    • C. 

      (3) Avoid unnecessary head movement and to keep her/his eyes on a point outside the aircraft.

  • 7. 
    In an unpressurised aircraft, at high altitudes the amount of oxygen that diffuses acrossthe lung membranes into the blood is
    • A. 

      (1) decreased because of the low partial pressure of oxygen.

    • B. 

      (2) decreased because of the lower temperatures.

    • C. 

      (3) unchanged to that at sea level.

  • 8. 
    During a climb to 18,000 ft, the percentage of oxygen in the atmosphere
    • A. 

      (1) increases.

    • B. 

      (2) decreases.

    • C. 

      (3) remains the same.

  • 9. 
    Although not required, supplemental oxygen is recommended for use when flying atnight above
    • A. 

      (1) 1,500 m (5,000 ft).

    • B. 

      (2) 3,050 m (10,000 ft).

    • C. 

      (3) 3,800 m (12,500 ft).

  • 10. 
    Hypoxia is the result of
    • A. 

      (1) shortage of oxygen in the body.

    • B. 

      (2) insufficient oxygen in the air.

    • C. 

      (3) excessive nitrogen in the bloodstream.

  • 11. 
    Which statement best defines hypoxia?
    • A. 

      (1) A state of oxygen deficiency in the body.

    • B. 

      (2) An abnormal increase in the volume of air breathed.

    • C. 

      (3) A condition of gas bubble formation around the joints or muscles.

  • 12. 
    Which statement concerning hypoxia is true?
    • A. 

      (1) Hypoxia is caused by nitrogen bubbles in the joints and bloodstream.

    • B. 

      (2) Tingling of the skin and a false sense of security may be symptoms of hypoxia.

    • C. 

      (3) Forcing oneself to concentrate on the flight instruments will help to overcome the effects of hypoxia.

  • 13. 
    Which occurs when climbing above 18,000 feet in an unpressurized aircraft withoutsupplemental oxygen?
    • A. 

      (1) Gases trapped in the body contract and prevent nitrogen from escaping the bloodstream.

    • B. 

      (2) The pressure in the middle ear becomes less than the atmospheric pressure in the cabin.

    • C. 

      (3) The oxygen pressure within the lungs cannot be maintained without an increase in inhaled oxygen pressure.

  • 14. 
    Susceptibility to carbon monoxide poisoning increases as
    • A. 

      (1) altitude increases.

    • B. 

      (2) altitude decreases.

    • C. 

      (3) air pressure increases.

  • 15. 
    Hypemic hypoxia has the same symptoms as hypoxic hypoxia, but it is most often aresult of
    • A. 

      (1) poor blood circulation.

    • B. 

      (2) a leaking exhaust manifold.

    • C. 

      (3) use of alcohol or drugs before flight.

  • 16. 
    Carbon monoxide in an aircraft cabin is
    • A. 

      (1) easily recognizable because of its peculiar odor.

    • B. 

      (2) easily recognizable because of its peculiar color.

    • C. 

      (3) difficult to recognize because of its odorless and colorless.

  • 17. 
    Large accumulations of carbon monoxide in the human body result in
    • A. 

      (1) tightness across the forehead.

    • B. 

      (2) loss of muscular power.

    • C. 

      (3) an increased sense of well-being.

  • 18. 
    What is one effect smoking has on a pilot?
    • A. 

      (1) Decreases night vision by 50 percent.

    • B. 

      (2) Increases body heat which, in turn, creates a demand for more oxygen.

    • C. 

      (3) Creates additional carbon dioxide gases in the body which often leads to hyperventilation.

  • 19. 
    A person may not act as a crewmember of a civil aircraft if alcoholic beverages havebeen consumed by that person within the preceding
    • A. 

      (1) 8 hours.

    • B. 

      (2) 12 hours.

    • C. 

      (3) 24 hours.

  • 20. 
    Which would most likely result in hyperventilation?
    • A. 

      (1) Emotional tension, anxiety, or fear.

    • B. 

      (2) The excessive consumption of alcohol.

    • C. 

      (3) An extremely slow rate of breathing and insufficient oxygen.

  • 21. 
    Rapid or extra deep breathing while using oxygen can cause a condition known as
    • A. 

      (1) aerosinusitis.

    • B. 

      (2) aerotitis.

    • C. 

      (3) hyperventilation.

  • 22. 
    Hyperventilation results from
    • A. 

      (1) a lack of carbon dioxide in the body.

    • B. 

      (2) flying too high without supplemental oxygen.

    • C. 

      (3) breathing too rapidly causing a lack of oxygen.

  • 23. 
    A pilot should be able to overcome the symptoms or avoid future occurrences ofhyperventilation by
    • A. 

      (1) closely monitoring the flight instruments to control the airplane.

    • B. 

      (2) slowing the breathing rate, breathing into a bag, or talking aloud.

    • C. 

      (3) increasing the breathing rate in order to increase lung ventilation.

  • 24. 
    If an individual has gone scuba diving which has not required a controlled ascent and willbe flying to cabin pressure altitudes of 8,000 feet or less, the recommended waiting time is at least
    • A. 

      (1) 4 hours.

    • B. 

      (2) 12 hours.

    • C. 

      (3) 24 hours.

  • 25. 
    If an individual has gone scuba diving which has required a controlled ascent and will beflying to cabin pressure altitudes of 8,000 feet or less, the recommended waiting time is at least
    • A. 

      (1) 4 hours.

    • B. 

      (2) 12 hours.

    • C. 

      (3) 24 hours.

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