NAUI Nitrox Diver Final Exam WITH COMPLETE QUESTIONS AND
ANSWERS |GRADED A+| CORRECT SCORE 2024
Nitrogen - (answer)The main reason to dive with "nitrox" is to reduce exposure to some of the problems
in diving caused by:
Our bodies do not use the nitrogen we breathe. - (answer)We say that nitrogen is an inert gas. This
means_____.
Narcosis - (answer)What is the primary safety hazard of breathing nitrogen at depth?
1992 - (answer)NAUI sanctioned enriched air nitrox training in:
Extended bottom time
Increased safety margins
Shorter surface intervals - (answer)Benefits of nitrox include:
15- 33 msw (50-110 fsw) - (answer)The greatest advantages for diving using nitrox occur in what depth
range?
False - (answer)True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis.
0.36 - (answer)If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix?
Boyle's Law - (answer)_____ describes the relationship between absolute pressure and the volume of a
gas.
Multiply the gas fraction by the absolute pressure. - (answer)To find the partial pressure of a gas in a
mixture:
Absolute pressure - (answer)The water pressure plus atmospheric pressure equals:
, 4.4 ata - (answer)What is the absolute pressure at 34 msw (111 fsw)?
2.3 ata - (answer)What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85 fsw)?
1.4 ata - (answer)What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)?
54 msw (178 fsw) - (answer)At what depth in the ocean is the absolute pressure 6.4 ata?
0.35 - (answer)If the PO2 at 30 msw (98 fsw) is 1.4 atmospheres, what is the oxygen fraction of the
breathing mixture?
3.9 ata - (answer)What is the partial pressure of nitrogen in air at 40 msw (130 fsw)?
False - (answer)True or False. Narcosis is reduced significantly when diving with enriched air nitrox.
Anesthesia - (answer)The mechanisms of nitrogen narcosis are thought to be similar to:
Metabolism - (answer)Oxygen is used by the body in:
Hypoxia - (answer)The term used for low oxygen in the body is:
Convulsions - (answer)Breathing high partial pressures of oxygen can cause:
1.4 ata - (answer)The accepted oxygen partial pressure exposure limit for recreational nitrox diving is:
Terminate the dive. - (answer)At the first signs or symptoms of oxygen toxicity, a diver should:
32% oxygen and 36% oxygen - (answer)Historically, what are the two standard nitrox mixes?
ANSWERS |GRADED A+| CORRECT SCORE 2024
Nitrogen - (answer)The main reason to dive with "nitrox" is to reduce exposure to some of the problems
in diving caused by:
Our bodies do not use the nitrogen we breathe. - (answer)We say that nitrogen is an inert gas. This
means_____.
Narcosis - (answer)What is the primary safety hazard of breathing nitrogen at depth?
1992 - (answer)NAUI sanctioned enriched air nitrox training in:
Extended bottom time
Increased safety margins
Shorter surface intervals - (answer)Benefits of nitrox include:
15- 33 msw (50-110 fsw) - (answer)The greatest advantages for diving using nitrox occur in what depth
range?
False - (answer)True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis.
0.36 - (answer)If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix?
Boyle's Law - (answer)_____ describes the relationship between absolute pressure and the volume of a
gas.
Multiply the gas fraction by the absolute pressure. - (answer)To find the partial pressure of a gas in a
mixture:
Absolute pressure - (answer)The water pressure plus atmospheric pressure equals:
, 4.4 ata - (answer)What is the absolute pressure at 34 msw (111 fsw)?
2.3 ata - (answer)What is the nitrogen partial pressure (PN2) in EAN35 at a depth of 26 msw (85 fsw)?
1.4 ata - (answer)What is the oxygen partial pressure (PO2) of EAN38 at 27 msw (87 fsw)?
54 msw (178 fsw) - (answer)At what depth in the ocean is the absolute pressure 6.4 ata?
0.35 - (answer)If the PO2 at 30 msw (98 fsw) is 1.4 atmospheres, what is the oxygen fraction of the
breathing mixture?
3.9 ata - (answer)What is the partial pressure of nitrogen in air at 40 msw (130 fsw)?
False - (answer)True or False. Narcosis is reduced significantly when diving with enriched air nitrox.
Anesthesia - (answer)The mechanisms of nitrogen narcosis are thought to be similar to:
Metabolism - (answer)Oxygen is used by the body in:
Hypoxia - (answer)The term used for low oxygen in the body is:
Convulsions - (answer)Breathing high partial pressures of oxygen can cause:
1.4 ata - (answer)The accepted oxygen partial pressure exposure limit for recreational nitrox diving is:
Terminate the dive. - (answer)At the first signs or symptoms of oxygen toxicity, a diver should:
32% oxygen and 36% oxygen - (answer)Historically, what are the two standard nitrox mixes?
