NAUI NITROX DIVER EXAM GUIDE
QUESTIONS AND ANSWERS
In 1878, Paul Bert established that _____, liberated as bubbles following sudden
decompression was the cause of decompression sickness. -Answer-Nitrogen
Nitrox is a _____ breathing gas. -Answer-Mid-Range
Nitrox provides the greatest advantages for dives in the _____ depth range. -
Answer-15-33m (50-110ft)
As a gas is heated in a rigid closed container its pressure will: -Answer-Increase
If one quantity of gas will dissolve at one atmosphere of pressure, then three
quantities of gas will dissolve at three atmospheres." This statement refers to which
law? -Answer-Henry's Law
Atmospheric pressure can be measured in many ways. What is one atmosphere in
millimeters of mercury? -Answer-760mmHg
The _____________ of a specific gas in a mix is the portion of the total pressure
exerted by that gas. -Answer-Partial Pressure
What is the absolute pressure at 17 msw (56 fsw)? -Answer-2.7 ata
What is the oxygen partial pressure (PO2) in EAN35 at a depth of 26 msw (85 fsw)?
-Answer-1.3 ata
If the oxygen partial pressure in your mix is 1.3 ata at a depth of 37 msw (122 fsw),
what is the fraction of oxygen in the mix? -Answer-.28
What is the partial pressure of oxygen in air at a depth of 21 msw (69 fsw)? -
Answer-.65 ata
The symptoms of nitrogen narcosis parallel those often seen in _____. -Answer-
Alcohol Intoxication
_____ Law states: "At a constant temperature, the volume of a gas varies inversely
with absolute pressure, while the density of a gas varies directly with absolute
pressure." -Answer-Boyle's Law
True or False: A diver suffering from nitrogen narcosis will always be aware that
he/she is impaired. -Answer-False
The mechanisms of nitrogen narcosis are thought to be similar to: -Answer-
Anesthesia
QUESTIONS AND ANSWERS
In 1878, Paul Bert established that _____, liberated as bubbles following sudden
decompression was the cause of decompression sickness. -Answer-Nitrogen
Nitrox is a _____ breathing gas. -Answer-Mid-Range
Nitrox provides the greatest advantages for dives in the _____ depth range. -
Answer-15-33m (50-110ft)
As a gas is heated in a rigid closed container its pressure will: -Answer-Increase
If one quantity of gas will dissolve at one atmosphere of pressure, then three
quantities of gas will dissolve at three atmospheres." This statement refers to which
law? -Answer-Henry's Law
Atmospheric pressure can be measured in many ways. What is one atmosphere in
millimeters of mercury? -Answer-760mmHg
The _____________ of a specific gas in a mix is the portion of the total pressure
exerted by that gas. -Answer-Partial Pressure
What is the absolute pressure at 17 msw (56 fsw)? -Answer-2.7 ata
What is the oxygen partial pressure (PO2) in EAN35 at a depth of 26 msw (85 fsw)?
-Answer-1.3 ata
If the oxygen partial pressure in your mix is 1.3 ata at a depth of 37 msw (122 fsw),
what is the fraction of oxygen in the mix? -Answer-.28
What is the partial pressure of oxygen in air at a depth of 21 msw (69 fsw)? -
Answer-.65 ata
The symptoms of nitrogen narcosis parallel those often seen in _____. -Answer-
Alcohol Intoxication
_____ Law states: "At a constant temperature, the volume of a gas varies inversely
with absolute pressure, while the density of a gas varies directly with absolute
pressure." -Answer-Boyle's Law
True or False: A diver suffering from nitrogen narcosis will always be aware that
he/she is impaired. -Answer-False
The mechanisms of nitrogen narcosis are thought to be similar to: -Answer-
Anesthesia
