NAUI Nitrox Diver Final Exam with
100% Correct Answers
The main reason to dive with "nitrox" is to reduce exposure to some of the problems in
diving caused by: - ANS-Nitrogen
We say that nitrogen is an inert gas. This means_____. - ANS-Our bodies do not use
the nitrogen we breathe.
What is the primary safety hazard of breathing nitrogen at depth? - ANS-Narcosis
NAUI sanctioned enriched air nitrox training in: - ANS-1992
Benefits of nitrox include: - ANS-Extended bottom time
Increased safety margins
Shorter surface intervals
What is the absolute pressure at 34 msw (111 fsw)? - ANS-4.4 ata
What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85 fsw)? -
ANS-2.3 ata
What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)? - ANS-1.4 ata
At what depth in the ocean is the absolute pressure 6.4 ata? - ANS-54 msw (178 fsw)
If the PO2 at 30 msw (98 fsw) is 1.4 atmospheres, what is the oxygen fraction of the
breathing mixture? - ANS-0.35
What is the partial pressure of nitrogen in air at 40 msw (130 fsw)? - ANS-3.9 ata
True or False. Narcosis is reduced significantly when diving with enriched air nitrox. -
ANS-False
The mechanisms of nitrogen narcosis are thought to be similar to: - ANS-Anesthesia
Oxygen is used by the body in: - ANS-Metabolism
The term used for low oxygen in the body is: - ANS-Hypoxia
Breathing high partial pressures of oxygen can cause: - ANS-Convulsions
100% Correct Answers
The main reason to dive with "nitrox" is to reduce exposure to some of the problems in
diving caused by: - ANS-Nitrogen
We say that nitrogen is an inert gas. This means_____. - ANS-Our bodies do not use
the nitrogen we breathe.
What is the primary safety hazard of breathing nitrogen at depth? - ANS-Narcosis
NAUI sanctioned enriched air nitrox training in: - ANS-1992
Benefits of nitrox include: - ANS-Extended bottom time
Increased safety margins
Shorter surface intervals
What is the absolute pressure at 34 msw (111 fsw)? - ANS-4.4 ata
What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85 fsw)? -
ANS-2.3 ata
What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)? - ANS-1.4 ata
At what depth in the ocean is the absolute pressure 6.4 ata? - ANS-54 msw (178 fsw)
If the PO2 at 30 msw (98 fsw) is 1.4 atmospheres, what is the oxygen fraction of the
breathing mixture? - ANS-0.35
What is the partial pressure of nitrogen in air at 40 msw (130 fsw)? - ANS-3.9 ata
True or False. Narcosis is reduced significantly when diving with enriched air nitrox. -
ANS-False
The mechanisms of nitrogen narcosis are thought to be similar to: - ANS-Anesthesia
Oxygen is used by the body in: - ANS-Metabolism
The term used for low oxygen in the body is: - ANS-Hypoxia
Breathing high partial pressures of oxygen can cause: - ANS-Convulsions
