NAUI Nitrox Diver Final Exam
Questions and Answers9
The main reason to dive with "nitrox" is to reduce exposure to some of the problems in diving
caused by: - ANSWERS-Nitrogen
We say that nitrogen is an inert gas. This means_____. - ANSWERS-Our bodies do not use the
nitrogen we breathe.
What is the primary safety hazard of breathing nitrogen at depth? - ANSWERS-Narcosis
NAUI sanctioned enriched air nitrox training in: - ANSWERS-1992
Benefits of nitrox include: - ANSWERS-Extended bottom time
Increased safety margins
Shorter surface intervals
The greatest advantages for diving using nitrox occur in what depth range? - ANSWERS-15- 33
msw (50-110 fsw)
True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis. - ANSWERS-
False
If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix? - ANSWERS-0.36
, _____ describes the relationship between absolute pressure and the volume of a gas. -
ANSWERS-Boyle's Law
To find the partial pressure of a gas in a mixture: - ANSWERS-Multiply the gas fraction by the
absolute pressure.
The water pressure plus atmospheric pressure equals: - ANSWERS-Absolute pressure
What is the absolute pressure at 34 msw (111 fsw)? - ANSWERS-4.4 ata
What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85 fsw)? -
ANSWERS-2.3 ata
What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)? - ANSWERS-1.4 ata
At what depth in the ocean is the absolute pressure 6.4 ata? - ANSWERS-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? - ANSWERS-0.35
What is the partial pressure of nitrogen in air at 40 msw (130 fsw)? - ANSWERS-3.9 ata
True or False. Narcosis is reduced significantly when diving with enriched air nitrox. - ANSWERS-
False
The mechanisms of nitrogen narcosis are thought to be similar to: - ANSWERS-Anesthesia
Oxygen is used by the body in: - ANSWERS-Metabolism
Questions and Answers9
The main reason to dive with "nitrox" is to reduce exposure to some of the problems in diving
caused by: - ANSWERS-Nitrogen
We say that nitrogen is an inert gas. This means_____. - ANSWERS-Our bodies do not use the
nitrogen we breathe.
What is the primary safety hazard of breathing nitrogen at depth? - ANSWERS-Narcosis
NAUI sanctioned enriched air nitrox training in: - ANSWERS-1992
Benefits of nitrox include: - ANSWERS-Extended bottom time
Increased safety margins
Shorter surface intervals
The greatest advantages for diving using nitrox occur in what depth range? - ANSWERS-15- 33
msw (50-110 fsw)
True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis. - ANSWERS-
False
If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix? - ANSWERS-0.36
, _____ describes the relationship between absolute pressure and the volume of a gas. -
ANSWERS-Boyle's Law
To find the partial pressure of a gas in a mixture: - ANSWERS-Multiply the gas fraction by the
absolute pressure.
The water pressure plus atmospheric pressure equals: - ANSWERS-Absolute pressure
What is the absolute pressure at 34 msw (111 fsw)? - ANSWERS-4.4 ata
What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85 fsw)? -
ANSWERS-2.3 ata
What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)? - ANSWERS-1.4 ata
At what depth in the ocean is the absolute pressure 6.4 ata? - ANSWERS-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? - ANSWERS-0.35
What is the partial pressure of nitrogen in air at 40 msw (130 fsw)? - ANSWERS-3.9 ata
True or False. Narcosis is reduced significantly when diving with enriched air nitrox. - ANSWERS-
False
The mechanisms of nitrogen narcosis are thought to be similar to: - ANSWERS-Anesthesia
Oxygen is used by the body in: - ANSWERS-Metabolism
