NAUI Nitrox Diver Final Exam
Exam Coverage
Exam coverage for the NAUI Nitrox Diver Final Exam includes the comprehensive knowledge and
practical application of safe diving practices using enriched air nitrox (EANx), focusing on gas
laws, partial pressures, and the physiological effects of increased oxygen exposure such as central
nervous system (CNS) and pulmonary oxygen toxicity. It evaluates understanding of oxygen limits,
nitrogen absorption, and how nitrox impacts no-decompression limits, while emphasizing dive
planning skills such as calculating maximum operating depth (MOD), equivalent air depth (EAD),
and tracking oxygen exposure. The exam also assesses competence in analyzing gas mixtures,
proper cylinder labeling, use of oxygen analyzers, dive computer settings, equipment
considerations, and adherence to safety protocols, with a strong focus on risk management and
applying safe, responsible diving practices in real-world scenarios.
We say that nitrogen is an inert gas. This means_____.
Our bodies do not use the nitrogen we breathe.
,The main reason to dive with "nitrox" is to reduce exposure to some of the problems in diving
caused by:
Nitrogen
What is the primary safety hazard of breathing nitrogen at depth?
Narcosis
NAUI sanctioned enriched air nitrox training in:
1992
Benefits of nitrox include:
Extended bottom time
Increased safety margins
Shorter surface intervals
, The greatest advantages for diving using nitrox occur in what depth range?
15- 33 msw (50-110 fsw)
True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis.
False
If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix?
0.36
_____ describes the relationship between absolute pressure and the volume of a gas.
Boyle's Law
To find the partial pressure of a gas in a mixture:
Multiply the gas fraction by the absolute pressure.
Exam Coverage
Exam coverage for the NAUI Nitrox Diver Final Exam includes the comprehensive knowledge and
practical application of safe diving practices using enriched air nitrox (EANx), focusing on gas
laws, partial pressures, and the physiological effects of increased oxygen exposure such as central
nervous system (CNS) and pulmonary oxygen toxicity. It evaluates understanding of oxygen limits,
nitrogen absorption, and how nitrox impacts no-decompression limits, while emphasizing dive
planning skills such as calculating maximum operating depth (MOD), equivalent air depth (EAD),
and tracking oxygen exposure. The exam also assesses competence in analyzing gas mixtures,
proper cylinder labeling, use of oxygen analyzers, dive computer settings, equipment
considerations, and adherence to safety protocols, with a strong focus on risk management and
applying safe, responsible diving practices in real-world scenarios.
We say that nitrogen is an inert gas. This means_____.
Our bodies do not use the nitrogen we breathe.
,The main reason to dive with "nitrox" is to reduce exposure to some of the problems in diving
caused by:
Nitrogen
What is the primary safety hazard of breathing nitrogen at depth?
Narcosis
NAUI sanctioned enriched air nitrox training in:
1992
Benefits of nitrox include:
Extended bottom time
Increased safety margins
Shorter surface intervals
, The greatest advantages for diving using nitrox occur in what depth range?
15- 33 msw (50-110 fsw)
True or False: A scuba diver breathing nitrox avoids any risk of nitrogen narcosis.
False
If a nitrox mix is 36% oxygen, what is the fraction of oxygen in the gas mix?
0.36
_____ describes the relationship between absolute pressure and the volume of a gas.
Boyle's Law
To find the partial pressure of a gas in a mixture:
Multiply the gas fraction by the absolute pressure.
