SCUBA NITROX QUIZ QUESTIONS AND
ANSWERS
In _______ Paul Bert established that ______ liberated as bubbles following sudden
decompression was the cause of decompression sickness. - Answer-1878, 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 feet)
Air is mostly comprised of oxygen and other miscellaneous gases with the least
abundant gas being Nitrogen - Answer-False
Using nitrox prevents Nitrogen Narcosis - Answer-False
Using Boyle's Law we can easily know that if you compared two 11 liter scuba cylinders
with different pressures the one with double the pressure also has a greater volume of
gas - Answer-true
Henry's Law addresses the quantity of a gas that will dissolve, and describes the rate at
which the gas will dissolve. - Answer-False
According to Dalton's law, the pressure exerted by each gas in a mixture will add up to
the total pressure of the gas - Answer-True
The pressure at 22.7 msw (75fsw) is 2.27 ATA - Answer-False, 3.27
A diver using EAN 33 at a depth of 21 msw (70fsw) has a 1.025 PP02 - Answer-True
If a gas is heated in a rigid closed container the pressure will - Answer-
Henry's law - Answer-if one quantity of gas will dissolve at one atmosphere of pressure
then three quanitities of gas will dissolve at three ata
Boyle's Law - Answer-the volume of gas varies inversely with the absolute pressure
What is the absolute pressure at 17 msw or 56 fsw - Answer-2.7 ata
the ______ if a specific gas in a mix is the portion of the total pressure exerted by that
gas - Answer-partial pressure
The absolute pressure at 17 msw or 56fsw - Answer-2.7 ata
, the oxygen partial pressure in ean35 at a depth of 26 msw/85 fsw is - Answer-1.3 ata
What is the partial pressure of oxygen in air at a depth of 69fsw - Answer-0.65
If the oxygen partial pressure in your mix is 1.3 ata at a depth of 122 fsw what is the
fraction of oxygen in the mix - Answer-0.28
At 1 ata there is 79% nitrogen or a partial pressure of 0.79 nitrogen as a diver descends
the percentage of the gas doesn't change but the partial pressure of the gas will
increase with increased pressure - Answer-True
The signs and symptoms of DCS do not vary and can be easily identified no matter the
injury or severity of the case. - Answer-False
Pulmonary oxygen toxicity is a significant concern for recreational nitrox divers -
Answer-False
Using the NOAA Oxygen Exposre limits the 24 hour limit at the maximum recreational
Partial pressure of oxygen is 200 minutes - Answer-False 180
The first precursor symptom of CNS oxygen toxicity is - Answer-highly variable
Argon in the air is essential to sustain life - Answer-False
THe primary waste product from the metabolism of oxygen is Carbon Dioxide - Answer-
True
The mechanisms of nitrogen narcosis are thought to be similar to anesthesia - Answer-
True
A stuporous condition characterized by impaired mental and physical performance and
changes in mood and behavior is known as nitrogen narcosis - Answer-True
A diver suffering from nitrogen narcosis will always be aware that he/she is impaired -
Answer-False
The acronym used to remember signs and symptoms of oxygen toxicity is - Answer-
Convulsions, visual, ears, nausea, twitching, irritability, Dizziness
THe recommended maximum P02 for recreational enriched air nitrox diving is _______
with a contingency of _________ - Answer-1.4, 1.6
For most persons, symptoms of hypoxia begin to appear when the PO2 - Answer-falls
below about 0.16 ata
ANSWERS
In _______ Paul Bert established that ______ liberated as bubbles following sudden
decompression was the cause of decompression sickness. - Answer-1878, 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 feet)
Air is mostly comprised of oxygen and other miscellaneous gases with the least
abundant gas being Nitrogen - Answer-False
Using nitrox prevents Nitrogen Narcosis - Answer-False
Using Boyle's Law we can easily know that if you compared two 11 liter scuba cylinders
with different pressures the one with double the pressure also has a greater volume of
gas - Answer-true
Henry's Law addresses the quantity of a gas that will dissolve, and describes the rate at
which the gas will dissolve. - Answer-False
According to Dalton's law, the pressure exerted by each gas in a mixture will add up to
the total pressure of the gas - Answer-True
The pressure at 22.7 msw (75fsw) is 2.27 ATA - Answer-False, 3.27
A diver using EAN 33 at a depth of 21 msw (70fsw) has a 1.025 PP02 - Answer-True
If a gas is heated in a rigid closed container the pressure will - Answer-
Henry's law - Answer-if one quantity of gas will dissolve at one atmosphere of pressure
then three quanitities of gas will dissolve at three ata
Boyle's Law - Answer-the volume of gas varies inversely with the absolute pressure
What is the absolute pressure at 17 msw or 56 fsw - Answer-2.7 ata
the ______ if a specific gas in a mix is the portion of the total pressure exerted by that
gas - Answer-partial pressure
The absolute pressure at 17 msw or 56fsw - Answer-2.7 ata
, the oxygen partial pressure in ean35 at a depth of 26 msw/85 fsw is - Answer-1.3 ata
What is the partial pressure of oxygen in air at a depth of 69fsw - Answer-0.65
If the oxygen partial pressure in your mix is 1.3 ata at a depth of 122 fsw what is the
fraction of oxygen in the mix - Answer-0.28
At 1 ata there is 79% nitrogen or a partial pressure of 0.79 nitrogen as a diver descends
the percentage of the gas doesn't change but the partial pressure of the gas will
increase with increased pressure - Answer-True
The signs and symptoms of DCS do not vary and can be easily identified no matter the
injury or severity of the case. - Answer-False
Pulmonary oxygen toxicity is a significant concern for recreational nitrox divers -
Answer-False
Using the NOAA Oxygen Exposre limits the 24 hour limit at the maximum recreational
Partial pressure of oxygen is 200 minutes - Answer-False 180
The first precursor symptom of CNS oxygen toxicity is - Answer-highly variable
Argon in the air is essential to sustain life - Answer-False
THe primary waste product from the metabolism of oxygen is Carbon Dioxide - Answer-
True
The mechanisms of nitrogen narcosis are thought to be similar to anesthesia - Answer-
True
A stuporous condition characterized by impaired mental and physical performance and
changes in mood and behavior is known as nitrogen narcosis - Answer-True
A diver suffering from nitrogen narcosis will always be aware that he/she is impaired -
Answer-False
The acronym used to remember signs and symptoms of oxygen toxicity is - Answer-
Convulsions, visual, ears, nausea, twitching, irritability, Dizziness
THe recommended maximum P02 for recreational enriched air nitrox diving is _______
with a contingency of _________ - Answer-1.4, 1.6
For most persons, symptoms of hypoxia begin to appear when the PO2 - Answer-falls
below about 0.16 ata
