NAUI Nitrox Diver Final Exam with verified detailed solutions
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The main reason to dive with "nitrox" is to reduce exposure to some of the problems
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in diving caused by: - ✔✔Nitrogen
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We say that nitrogen is an inert gas. This means_____. - ✔✔Our bodies do not use
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the nitrogen we breathe.
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What is the primary safety hazard of breathing nitrogen at depth? - ✔✔Narcosis
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NAUI sanctioned enriched air nitrox training in: - ✔✔1992
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Benefits of nitrox include: - ✔✔Extended bottom time
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Increased safety margins || ||
Shorter surface intervals || ||
The greatest advantages for diving using nitrox occur in what depth range? - ✔✔15-
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33 msw (50-110 fsw)
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True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis. -
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✔✔False
If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix? - ✔✔0.36
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_____ describes the relationship between absolute pressure and the volume of a gas.
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- ✔✔Boyle's Law
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, To find the partial pressure of a gas in a mixture: - ✔✔Multiply the gas fraction by the
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absolute pressure.
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The water pressure plus atmospheric pressure equals: - ✔✔Absolute pressure
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What is the absolute pressure at 34 msw (111 fsw)? - ✔✔4.4 ata
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What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85 fsw)?
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- ✔✔2.3 ata
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What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)? - ✔✔1.4 ata
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At what depth in the ocean is the absolute pressure 6.4 ata? - ✔✔54 msw (178 fsw)
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If the PO2 at 30 msw (98 fsw) is 1.4 atmospheres, what is the oxygen fraction of the
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breathing mixture? - ✔✔0.35 || || ||
What is the partial pressure of nitrogen in air at 40 msw (130 fsw)? - ✔✔3.9 ata
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True or False. Narcosis is reduced significantly when diving with enriched air nitrox. -
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✔✔False
The mechanisms of nitrogen narcosis are thought to be similar to: - ✔✔Anesthesia
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Oxygen is used by the body in: - ✔✔Metabolism
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The main reason to dive with "nitrox" is to reduce exposure to some of the problems
|| || || || || || || || || || || || || || || ||
in diving caused by: - ✔✔Nitrogen
|| || || || ||
We say that nitrogen is an inert gas. This means_____. - ✔✔Our bodies do not use
|| || || || || || || || || || || || || || || ||
the nitrogen we breathe.
|| || ||
What is the primary safety hazard of breathing nitrogen at depth? - ✔✔Narcosis
|| || || || || || || || || || || ||
NAUI sanctioned enriched air nitrox training in: - ✔✔1992
|| || || || || || || ||
Benefits of nitrox include: - ✔✔Extended bottom time
|| || || || || || ||
Increased safety margins || ||
Shorter surface intervals || ||
The greatest advantages for diving using nitrox occur in what depth range? - ✔✔15-
|| || || || || || || || || || || || || ||
33 msw (50-110 fsw)
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True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis. -
|| || || || || || || || || || || || || || ||
✔✔False
If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix? - ✔✔0.36
|| || || || || || || || || || || || || || || || || ||
_____ describes the relationship between absolute pressure and the volume of a gas.
|| || || || || || || || || || || || ||
- ✔✔Boyle's Law
|| ||
, To find the partial pressure of a gas in a mixture: - ✔✔Multiply the gas fraction by the
|| || || || || || || || || || || || || || || || ||
absolute pressure.
|| ||
The water pressure plus atmospheric pressure equals: - ✔✔Absolute pressure
|| || || || || || || || ||
What is the absolute pressure at 34 msw (111 fsw)? - ✔✔4.4 ata
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What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85 fsw)?
|| || || || || || || || || || || || || || || || ||
- ✔✔2.3 ata
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What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)? - ✔✔1.4 ata
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At what depth in the ocean is the absolute pressure 6.4 ata? - ✔✔54 msw (178 fsw)
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If the PO2 at 30 msw (98 fsw) is 1.4 atmospheres, what is the oxygen fraction of the
|| || || || || || || || || || || || || || || || || ||
breathing mixture? - ✔✔0.35 || || ||
What is the partial pressure of nitrogen in air at 40 msw (130 fsw)? - ✔✔3.9 ata
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True or False. Narcosis is reduced significantly when diving with enriched air nitrox. -
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✔✔False
The mechanisms of nitrogen narcosis are thought to be similar to: - ✔✔Anesthesia
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Oxygen is used by the body in: - ✔✔Metabolism
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