NAUI Nitrox Diver Final Exam UPDATED
ACTUAL Questions and CORRECT
Answers
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
What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)? - CORRECT
ANSWER - 1.4 ata
At what depth in the ocean is the absolute pressure 6.4 ata? - CORRECT ANSWER - 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? - CORRECT ANSWER - 0.35
What is the partial pressure of nitrogen in air at 40 msw (130 fsw)? - CORRECT
ANSWER - 3.9 ata
True or False. Narcosis is reduced significantly when diving with enriched air nitrox. -
CORRECT ANSWER - False
The mechanisms of nitrogen narcosis are thought to be similar to: - CORRECT
ANSWER - Anesthesia
ACTUAL Questions and CORRECT
Answers
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
What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)? - CORRECT
ANSWER - 1.4 ata
At what depth in the ocean is the absolute pressure 6.4 ata? - CORRECT ANSWER - 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? - CORRECT ANSWER - 0.35
What is the partial pressure of nitrogen in air at 40 msw (130 fsw)? - CORRECT
ANSWER - 3.9 ata
True or False. Narcosis is reduced significantly when diving with enriched air nitrox. -
CORRECT ANSWER - False
The mechanisms of nitrogen narcosis are thought to be similar to: - CORRECT
ANSWER - Anesthesia
