NAUI Nitrox Diver Questions with Detailed
Verified Answers
the ______ in the air you are breathing limits the time you can stay at depth Ans:
nitrogen
in the early twentieth century, a quantitative model for nitrogen loading and dive tables
were developed by Ans: John Scott Haldane
we say that nitrogen is an inert gas. this means Ans: our bodies do not use the
nitrogen we breathe
credit for developing and introducing nitrox diving techniques for standard scuba goes
to Ans: Dr. Morgan Wells
NAUI sanctioned enriched air nitrox training in Ans: 1992
two benefits of diving with nitrox are Ans: longer dive times and shorter surface
intervals
what does the "x" stand for in the term EANx? Ans: 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 Ans: nitrogen
nitrox is a _____ breathing gas Ans: mid-range
nitrox provides the greatest advantages for dives in the _____ depth range Ans: 15-
33 m (50-110 ft)
as a gas is heated in a rigid closed container its pressure will Ans: 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? Ans: Henry's Law
, atmospheric pressure can be measured in many ways. what is one atmosphere in
millimeters of mercury? Ans: 760 mmHg
the ____ of a specific gas in a mix is the portion of the total pressure exerted by that
gas Ans: partial pressure
what is the absolute pressure at 17 msw (56 fsw)? Ans: 2.7 ata
what is the oxygen partial pressure in EAN35 at a depth of 26 msw (85 fsw)? Ans: 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? Ans: 0.28
what is the partial pressure of oxygen in air at a depth of 21 msw (69 fsw)? Ans: 0.65
ata
the symptoms of nitrogen narcosis parallel those often seen in Ans: 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."
Ans: 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 Ans: true
a diver suffering from nitrogen narcosis will always be aware that he is impaired Ans:
false
the mechanisms of nitrogen narcosis are thought to be similar to Ans: anesthesia
the controlled release of pressure during ascent from a scuba dive is Ans:
decompression
which gas in air is essential to sustain life? Ans: oxygen
© Get it right 2025 Getaway - Stuvia US All rights reserved
Verified Answers
the ______ in the air you are breathing limits the time you can stay at depth Ans:
nitrogen
in the early twentieth century, a quantitative model for nitrogen loading and dive tables
were developed by Ans: John Scott Haldane
we say that nitrogen is an inert gas. this means Ans: our bodies do not use the
nitrogen we breathe
credit for developing and introducing nitrox diving techniques for standard scuba goes
to Ans: Dr. Morgan Wells
NAUI sanctioned enriched air nitrox training in Ans: 1992
two benefits of diving with nitrox are Ans: longer dive times and shorter surface
intervals
what does the "x" stand for in the term EANx? Ans: 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 Ans: nitrogen
nitrox is a _____ breathing gas Ans: mid-range
nitrox provides the greatest advantages for dives in the _____ depth range Ans: 15-
33 m (50-110 ft)
as a gas is heated in a rigid closed container its pressure will Ans: 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? Ans: Henry's Law
, atmospheric pressure can be measured in many ways. what is one atmosphere in
millimeters of mercury? Ans: 760 mmHg
the ____ of a specific gas in a mix is the portion of the total pressure exerted by that
gas Ans: partial pressure
what is the absolute pressure at 17 msw (56 fsw)? Ans: 2.7 ata
what is the oxygen partial pressure in EAN35 at a depth of 26 msw (85 fsw)? Ans: 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? Ans: 0.28
what is the partial pressure of oxygen in air at a depth of 21 msw (69 fsw)? Ans: 0.65
ata
the symptoms of nitrogen narcosis parallel those often seen in Ans: 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."
Ans: 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 Ans: true
a diver suffering from nitrogen narcosis will always be aware that he is impaired Ans:
false
the mechanisms of nitrogen narcosis are thought to be similar to Ans: anesthesia
the controlled release of pressure during ascent from a scuba dive is Ans:
decompression
which gas in air is essential to sustain life? Ans: oxygen
© Get it right 2025 Getaway - Stuvia US All rights reserved
