NAUI Nitrox Diver Exam with complete
solutions
the ______ in the air you are breathing limits the time you can stay at depth - Answer -
nitrogen
in the early twentieth century, a quantitative model for nitrogen loading and dive tables
were developed by - Answer -John Scott Haldane
we say that nitrogen is an inert gas. this means - Answer -our bodies do not use the
nitrogen we breathe
credit for developing and introducing nitrox diving techniques for standard scuba goes to
- Answer -Dr. Morgan Wells
NAUI sanctioned enriched air nitrox training in - Answer -1992
two benefits of diving with nitrox are - Answer -longer dive times and shorter surface
intervals
what does the "x" stand for in the term EANx? - Answer -the percentage of oxygen in
the mix
in 1878, Paul Bert established that_____, liberated as bubbles following sudden
decompression was the cause of decompression sickeness - Answer -nitrogen
nitrox is a _____ breathing gas - Answer -mid-range
nitrox provides the greatest advantages for dives in the _____ depth range - Answer -
15-33 m (50-110 ft)
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 -760 mmHg
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 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 -0.28
what is the partial pressure of oxygen in air at a depth of 21 msw (69 fsw)? - Answer -
0.65 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
each 10 meters (33 feet) that you descend in the ocean adds another atmosphere of
pressure to the one atmosphere of surface pressure - Answer -true
a diver suffering from nitrogen narcosis will always be aware that he is impaired -
Answer -false
the mechanisms of nitrogen narcosis are thought to be similar to - Answer -anesthesia
the controlled release of pressure during ascent from a scuba dive is - Answer -
decompression
which gas in air is essential to sustain life? - Answer -oxygen
the primary waste product from the metabolism of oxygen is - Answer -carbon dioxide
for most people, symptoms of hypoxia begin to appear when the PO2 - Answer -falls
below about 0.16 ata
pulmonary oxygen toxicity results from - Answer -prolonged exposure to elevated
oxygen partial pressures
solutions
the ______ in the air you are breathing limits the time you can stay at depth - Answer -
nitrogen
in the early twentieth century, a quantitative model for nitrogen loading and dive tables
were developed by - Answer -John Scott Haldane
we say that nitrogen is an inert gas. this means - Answer -our bodies do not use the
nitrogen we breathe
credit for developing and introducing nitrox diving techniques for standard scuba goes to
- Answer -Dr. Morgan Wells
NAUI sanctioned enriched air nitrox training in - Answer -1992
two benefits of diving with nitrox are - Answer -longer dive times and shorter surface
intervals
what does the "x" stand for in the term EANx? - Answer -the percentage of oxygen in
the mix
in 1878, Paul Bert established that_____, liberated as bubbles following sudden
decompression was the cause of decompression sickeness - Answer -nitrogen
nitrox is a _____ breathing gas - Answer -mid-range
nitrox provides the greatest advantages for dives in the _____ depth range - Answer -
15-33 m (50-110 ft)
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 -760 mmHg
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 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 -0.28
what is the partial pressure of oxygen in air at a depth of 21 msw (69 fsw)? - Answer -
0.65 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
each 10 meters (33 feet) that you descend in the ocean adds another atmosphere of
pressure to the one atmosphere of surface pressure - Answer -true
a diver suffering from nitrogen narcosis will always be aware that he is impaired -
Answer -false
the mechanisms of nitrogen narcosis are thought to be similar to - Answer -anesthesia
the controlled release of pressure during ascent from a scuba dive is - Answer -
decompression
which gas in air is essential to sustain life? - Answer -oxygen
the primary waste product from the metabolism of oxygen is - Answer -carbon dioxide
for most people, symptoms of hypoxia begin to appear when the PO2 - Answer -falls
below about 0.16 ata
pulmonary oxygen toxicity results from - Answer -prolonged exposure to elevated
oxygen partial pressures
