NAUI Nitrox Diver Exam Questions with 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 Eon? - 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 sickness - 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 maw (56 few)? - ANS 2.7 at
, What is the oxygen partial pressure in EAN35 at a depth of 26 maw (85 few)? - ANS 1.3
at
If the oxygen partial pressure in your mix is 1.3 at at a depth of 37 maw (122 few), 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 maw (69 few)? - ANS 0.65
at
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
The primary waste product from the metabolism of oxygen is - ANS carbon dioxide
For most people, symptoms of hypoxia begin to appear when the PO2 - ANS falls below
about 0.16 at
Pulmonary oxygen toxicity results from - ANS prolonged exposure to elevated oxygen
partial pressures
One of the factors that can increase susceptibility to CNS oxygen toxicity is - ANS
heavy exercise and carbon dioxide buildup
The acronym used to remember signs and symptoms of oxygen toxicity is - ANS
Convent ID
The recommended maximum PO2 for enriched air nitrox diving is - ANS 1.4 at
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 Eon? - 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 sickness - 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 maw (56 few)? - ANS 2.7 at
, What is the oxygen partial pressure in EAN35 at a depth of 26 maw (85 few)? - ANS 1.3
at
If the oxygen partial pressure in your mix is 1.3 at at a depth of 37 maw (122 few), 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 maw (69 few)? - ANS 0.65
at
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
The primary waste product from the metabolism of oxygen is - ANS carbon dioxide
For most people, symptoms of hypoxia begin to appear when the PO2 - ANS falls below
about 0.16 at
Pulmonary oxygen toxicity results from - ANS prolonged exposure to elevated oxygen
partial pressures
One of the factors that can increase susceptibility to CNS oxygen toxicity is - ANS
heavy exercise and carbon dioxide buildup
The acronym used to remember signs and symptoms of oxygen toxicity is - ANS
Convent ID
The recommended maximum PO2 for enriched air nitrox diving is - ANS 1.4 at
