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NAUI Nitrox Diver Exam Questions with correct Answers
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NAUI Nitrox Diver Exam Questions with correct Answers
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NAUI Nitrox Diver Exam Questions withcorrect Answers
In 1878, Paul Bert established that _____, liberated as bubbles following sudden
decompression was the cause of decompression sickness. - Answer -Nitrogen
Nitrox is a _____ breathing gas. - Answer -Mid-Range
Nitrox provides the greatest advantages for dives in the _____ depth range. - Answer -
15-33m (50-110ft)
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 -760mmHg
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 (PO2) 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 -.28
What is the partial pressure of oxygen in air at a depth of 21 msw (69 fsw)? - Answer -
.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 Law
True or False: A diver suffering from nitrogen narcosis will always be aware that he/she
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 persons, 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.
One of the factors that can increase susceptibility to CNS oxygen toxicity is: - Answer -
Heavy exercise and carbon dioxide buildup.
The acronym used to remember signs and symptoms of oxygen toxicity is: - Answer -
Con V E N T I D.
The recommended maximum PO2 for enriched air nitrox diving is: - Answer -1.4 ata.
The first precursor symptom of CNS oxygen toxicity is: - Answer -Precursor symptoms
are highly variable.
A stuporous condition characterized by impaired mental and physical performance and
changes in mood and behavior is known as _____. - Answer -Nitrogen narcosis
The two most commonly used nitrox mixtures, also known as NOAA Nitrox I and NOAA
Nitrox II, are: - Answer -32% and 36% oxygen.
The Maximum Operating Depth (MOD) of a gas mix is determined by: - Answer -The
maximum acceptable partial pressure of oxygen.
Calculate the normal maximum operating depth for EAN32 (PO2=1.4 ata). - Answer -34
msw (111 fsw)
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