NAUI Nitrox Diver Exam with Complete
Solutions
the ______ in the air you are breathing limits the time you can stay at depth - correct
Answer-nitrogen
in the early twentieth century, a quantitative model for nitrogen loading and dive tables
were developed by - correct Answer-John Scott Haldane
we say that nitrogen is an inert gas. this means - correct Answer-our bodies do not use
the nitrogen we breathe
credit for developing and introducing nitrox diving techniques for standard scuba goes to
- correct Answer-Dr. Morgan Wells
NAUI sanctioned enriched air nitrox training in - correct Answer-1992
two benefits of diving with nitrox are - correct Answer-longer dive times and shorter
surface intervals
what does the "x" stand for in the term EANx? - correct 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 - correct Answer-nitrogen
nitrox is a _____ breathing gas - correct Answer-mid-range
nitrox provides the greatest advantages for dives in the _____ depth range - correct
Answer-15-33 m (50-110 ft)
as a gas is heated in a rigid closed container its pressure will - correct 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? - correct
Answer-Henry's Law
atmospheric pressure can be measured in many ways. what is one atmosphere in
millimeters of mercury? - correct Answer-760 mmHg
, the ____ of a specific gas in a mix is the portion of the total pressure exerted by that gas
- correct Answer-partial pressure
what is the absolute pressure at 17 msw (56 fsw)? - correct Answer-2.7 ata
what is the oxygen partial pressure in EAN35 at a depth of 26 msw (85 fsw)? - correct
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? - correct Answer-0.28
what is the partial pressure of oxygen in air at a depth of 21 msw (69 fsw)? - correct
Answer-0.65 ata
the symptoms of nitrogen narcosis parallel those often seen in - correct 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." -
correct 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 - correct Answer-true
a diver suffering from nitrogen narcosis will always be aware that he is impaired -
correct Answer-false
the mechanisms of nitrogen narcosis are thought to be similar to - correct Answer-
anesthesia
the controlled release of pressure during ascent from a scuba dive is - correct Answer-
decompression
which gas in air is essential to sustain life? - correct Answer-oxygen
the primary waste product from the metabolism of oxygen is - correct Answer-carbon
dioxide
for most people, symptoms of hypoxia begin to appear when the PO2 - correct Answer-
falls below about 0.16 ata
pulmonary oxygen toxicity results from - correct Answer-prolonged exposure to elevated
oxygen partial pressures
one of the factors that can increase susceptibility to CNS oxygen toxicity is - correct
Answer-heavy exercise and carbon dioxide buildup
Solutions
the ______ in the air you are breathing limits the time you can stay at depth - correct
Answer-nitrogen
in the early twentieth century, a quantitative model for nitrogen loading and dive tables
were developed by - correct Answer-John Scott Haldane
we say that nitrogen is an inert gas. this means - correct Answer-our bodies do not use
the nitrogen we breathe
credit for developing and introducing nitrox diving techniques for standard scuba goes to
- correct Answer-Dr. Morgan Wells
NAUI sanctioned enriched air nitrox training in - correct Answer-1992
two benefits of diving with nitrox are - correct Answer-longer dive times and shorter
surface intervals
what does the "x" stand for in the term EANx? - correct 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 - correct Answer-nitrogen
nitrox is a _____ breathing gas - correct Answer-mid-range
nitrox provides the greatest advantages for dives in the _____ depth range - correct
Answer-15-33 m (50-110 ft)
as a gas is heated in a rigid closed container its pressure will - correct 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? - correct
Answer-Henry's Law
atmospheric pressure can be measured in many ways. what is one atmosphere in
millimeters of mercury? - correct Answer-760 mmHg
, the ____ of a specific gas in a mix is the portion of the total pressure exerted by that gas
- correct Answer-partial pressure
what is the absolute pressure at 17 msw (56 fsw)? - correct Answer-2.7 ata
what is the oxygen partial pressure in EAN35 at a depth of 26 msw (85 fsw)? - correct
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? - correct Answer-0.28
what is the partial pressure of oxygen in air at a depth of 21 msw (69 fsw)? - correct
Answer-0.65 ata
the symptoms of nitrogen narcosis parallel those often seen in - correct 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." -
correct 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 - correct Answer-true
a diver suffering from nitrogen narcosis will always be aware that he is impaired -
correct Answer-false
the mechanisms of nitrogen narcosis are thought to be similar to - correct Answer-
anesthesia
the controlled release of pressure during ascent from a scuba dive is - correct Answer-
decompression
which gas in air is essential to sustain life? - correct Answer-oxygen
the primary waste product from the metabolism of oxygen is - correct Answer-carbon
dioxide
for most people, symptoms of hypoxia begin to appear when the PO2 - correct Answer-
falls below about 0.16 ata
pulmonary oxygen toxicity results from - correct Answer-prolonged exposure to elevated
oxygen partial pressures
one of the factors that can increase susceptibility to CNS oxygen toxicity is - correct
Answer-heavy exercise and carbon dioxide buildup
