NAUI Nitrox Diver Exam Study
Guide – Practice Questions with
Verified Answers. GRADED A+.
Latest 2026/2027 Update
The main reason to dive with "nitrox" is to reduce exposure to some of the
problems in diving caused by: - correct answer ✔✔ -Nitrogen
We say that nitrogen is an inert gas. This means_____. - correct answer ✔✔ -Our
bodies do not use the nitrogen we breathe.
What is the primary safety hazard of breathing nitrogen at depth? - correct
answer
<<<<<💕💕💕✔✔Narcosis
NAUI sanctioned enriched air nitrox training in: - correct answer ✔✔ -1992
Benefits of nitrox include: - correct answer ✔✔ -Extended bottom time
Increased safety margins
Shorter surface intervals
, The greatest advantages for diving using nitrox occur in what depth range? -
correct answer ✔✔ -15- 33 msw (50-110 fsw)
True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis. -
correct answer
<<<<<💕💕💕✔✔False
If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix? -
correct answer
<<<<<💕💕💕✔✔0.36
_____ describes the relationship between absolute pressure and the volume of a
gas. - correct answer
<<<<<💕💕💕✔✔Boyle's Law
To find the partial pressure of a gas in a mixture: - correct answer ✔✔ -Multiply
the gas fraction by the absolute pressure.
The water pressure plus atmospheric pressure equals: - correct answer ✔✔ -
Absolute pressure
What is the absolute pressure at 34 msw (111 fsw)? - correct answer ✔✔ -4.4 ata
What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85
fsw)? - correct answer
<<<<<💕💕💕✔✔2.3 ata
Guide – Practice Questions with
Verified Answers. GRADED A+.
Latest 2026/2027 Update
The main reason to dive with "nitrox" is to reduce exposure to some of the
problems in diving caused by: - correct answer ✔✔ -Nitrogen
We say that nitrogen is an inert gas. This means_____. - correct answer ✔✔ -Our
bodies do not use the nitrogen we breathe.
What is the primary safety hazard of breathing nitrogen at depth? - correct
answer
<<<<<💕💕💕✔✔Narcosis
NAUI sanctioned enriched air nitrox training in: - correct answer ✔✔ -1992
Benefits of nitrox include: - correct answer ✔✔ -Extended bottom time
Increased safety margins
Shorter surface intervals
, The greatest advantages for diving using nitrox occur in what depth range? -
correct answer ✔✔ -15- 33 msw (50-110 fsw)
True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis. -
correct answer
<<<<<💕💕💕✔✔False
If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix? -
correct answer
<<<<<💕💕💕✔✔0.36
_____ describes the relationship between absolute pressure and the volume of a
gas. - correct answer
<<<<<💕💕💕✔✔Boyle's Law
To find the partial pressure of a gas in a mixture: - correct answer ✔✔ -Multiply
the gas fraction by the absolute pressure.
The water pressure plus atmospheric pressure equals: - correct answer ✔✔ -
Absolute pressure
What is the absolute pressure at 34 msw (111 fsw)? - correct answer ✔✔ -4.4 ata
What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85
fsw)? - correct answer
<<<<<💕💕💕✔✔2.3 ata
