NITROX CERTIFICATION EXAM
QUESTIONS AND ANSWERS
Nitrogen - Answer-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...
Nitrogen Narcosis - Answer-What is the primary safety hazard if breathing nitrogen at
depth?
1992 - Answer-NAUI sanctioned enriched air nitrox training
All of the above - Answer-Benefits of Nitrox include
15-33 msw (50-110 fsw) - Answer-The greatest advantages of diving using Nitrox occur
in what depth range?
False - Answer-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 msw)?
*Chapter 2 formula and tables - Answer-What is the nitrogen partial pressure (PN2) in
EAN35 at a depth of 26 msw (85 fsw)?
*Chapter 2 formula and tables - Answer-What is the oxygen partial pressure (PO2) of
EAN38 at 27 msw (87 fsw)?
*Chapter 2 formula and tables - Answer-At what depth in the ocean is the absolute
pressure 6.4 ata?
QUESTIONS AND ANSWERS
Nitrogen - Answer-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...
Nitrogen Narcosis - Answer-What is the primary safety hazard if breathing nitrogen at
depth?
1992 - Answer-NAUI sanctioned enriched air nitrox training
All of the above - Answer-Benefits of Nitrox include
15-33 msw (50-110 fsw) - Answer-The greatest advantages of diving using Nitrox occur
in what depth range?
False - Answer-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 msw)?
*Chapter 2 formula and tables - Answer-What is the nitrogen partial pressure (PN2) in
EAN35 at a depth of 26 msw (85 fsw)?
*Chapter 2 formula and tables - Answer-What is the oxygen partial pressure (PO2) of
EAN38 at 27 msw (87 fsw)?
*Chapter 2 formula and tables - Answer-At what depth in the ocean is the absolute
pressure 6.4 ata?
