AVIA 400 Quiz Gases in the Cockpit

AVIA 400 Quiz: Gases in the Cockpit

Covers the Learn material from Module 1: Week 1 — Module 2: Week 2.

1. A prickling, tingling, or itching of the skin caused by altitude decompression sickness (DCS) is called
2. 9 percent of the atmosphere’s mass lies below approximately 164,000 feet MSL, while ________ percent lies below 53,000 feet MSL.
3. At what altitude does water within the body begin to boil?
4. Law states that the amount of gas dissolved in a solution is directly proportional to the pressure of the gas over the solution.
5. Compared to cones during the day, rods are more sensitive to ________ light and less sensitive to light at night.
6. The ________ shift describes what happens to color sensitivity when transitioning from photopic vision to scotopic vision.
7. is the inability to use or understand words and can occur with DCS.
8. A gas under enough pressure will __________ , and when the pressure is reduced it will back into gaseous form.
9. is a pilot’s most important sense when it comes to obtaining information needed to safely y an aircraft.
10. Half the weight of the earth’s atmosphere (i.e., 50 percent of its mass) lies below _________ feet MSL.
11. The physiological deficient zone extends from ________ feet to 50,000 feet.
12. Focusing on an object involves changing the shape of the lens of the eye, a process
    called
13. The creeps is the most common symptom of decompression sickness among aircrew.
14. The ___________ (neurological manifestations) are the least common symptoms of DCS but are very serious and can result in death.
15. DCS is normally only a problem above _________ feet but occasionally can occur as low as 18,000 feet.
16. The __________ involve N2 bubbling into the joints and muscles of the knees, shoulders, elbows, wrists or hands, ankles or feet, and rarely the hips.
17. Less than 1 percent of DCS symptoms occur at 18,000 feet.
18. is a nearsightedness that occurs at high altitudes, in reduced visibility, and at night.
19. A loss of vision in part of the visual eld due to DCS, is known as
20. The process of breathing in oxygen and breathing out carbon dioxide is called
21. As light levels drop, the cones stop functioning while the rods continue increasing their sensitivity until the eyes can better see with lower light intensities. This process is called
22. Your best visual acuity is only good up to a maximum of one to two degrees from the center of the fovea in daylight conditions, which corresponds to size of a ________ held at arm’s length.
23. If sea-level pressure is 1,000 mb (or hPa), the partial pressure of oxygen (O2) is approximately __________ hPa (mb).
24. The air we breathe consists mainly of _________.
25. The altitude at which water within the blood “boils” or changes into water vapor is known as __________ Line.