NAUI NITROX EXAM QUESTIONS
WITH VERIFIED SOLUTIONS
What is nitrox? - ANSWER-Fraction of nitrogen is reduced, oxygen increased,
also called EANx for example EAN32 (32% oxygen)
Reducing amount of nitrogen means you can dive ------ to a given depth or reduce -----
between dives - ANSWER-longer, required surface interval
excess nitrogen is the cause of ----- - ANSWER-decompression sickness
Late hypoxia: Bradycardia; Extreme restlessness; Dyspnea
Hyperoxia - ANSWER-Excess oxygen or higher than normal partial pressure of oxygen
a diver suffering from nitrogen narcosis will always be aware that he is impaired -
ANSWER-False
the primary waste product from the metabolism of oxygen is _______ - ANSWER-CO2
the mechanisms of nitrogen narcosis are thought to be similar to _______ - ANSWER-
anesthesia
a stuporous condition characterized by impaired mental and physical performance and
changes in mood and behavior is known as_______ - ANSWER-nitrogen narcosis
Is argon in air essential to sustain life - ANSWER-No
The first precursor symptom of CNS oxygen toxicity is _____ - ANSWER-highly variable
For most persons, symptoms of hypoxia begin to appear when the PO2 falls below
_____ - ANSWER-0.16 ata
Acronym used to remember signs and symptoms of oxygen toxicity is - ANSWER-
ConVENTID
Con-vulsions
V-isual
E-ars
, N-ausea
T-witching
I-rritability
D-izziness
ODIGTML: on dives I go through my life - ANSWER-Oxygen, decompression, inert gas
narcosis, gas management, thermal, mission, logistics
the two most commonly used nitrox mixtures, also known as NOAA nitrox I and II are: -
ANSWER-32% and 36% oxygen
The danger of exceeding the maximum operating depth - ANSWER-CNS Oxygen
Toxicity
What is the best mix - ANSWER-highest percentage of oxygen that can be used at a
partial pressure of 1.4 at the planned dive depth
The maximum operating depth (MOD) of a gas mix is determined by - ANSWER-the
maximum acceptable pressure of oxygen
The best mix (not to exceed 40% O2 to use for an oxygen partial pressure limit of 1.6
ata on a dive to 27 msw (90 fsw) is - ANSWER-EAN40
What is the maximum operating depth for EAN32 at a ppo2 of 1.4 - ANSWER-34 msw
(111 fsw)
a diver using EAN32 makes a dive to 33 msw for 23 minutes. After surface interval of 2
hours they make a second dive with EAN32 to 23 msw. Using NAUI Ean32 dive tables,
the adjusted max dive time for the second dive is - ANSWER-11 minute
If the same diver using NAUI RGBM EAN32 dive tables, the max dive time for the
second dive would be - ANSWER-47 minutes
if flying or ascending to altitude after diving, wait ____ hours after a single dive and
_____ hours after a series of repetitive dives. Another good rule is to wait ____ hours
prior to flying or ascending to altitude - ANSWER-12, 18, 24
NAUI RGBM no calculation sea level tables may be used up to _________ of altitude -
ANSWER-610 m (2000 feet)
standard NAUI dive tables can be used up to altitudes of about - ANSWER-300 meters
(1000ft)
what is the equivalent air depth for 23 msw dive using EAN32 - ANSWER-18 msw (60
fsw)
WITH VERIFIED SOLUTIONS
What is nitrox? - ANSWER-Fraction of nitrogen is reduced, oxygen increased,
also called EANx for example EAN32 (32% oxygen)
Reducing amount of nitrogen means you can dive ------ to a given depth or reduce -----
between dives - ANSWER-longer, required surface interval
excess nitrogen is the cause of ----- - ANSWER-decompression sickness
Late hypoxia: Bradycardia; Extreme restlessness; Dyspnea
Hyperoxia - ANSWER-Excess oxygen or higher than normal partial pressure of oxygen
a diver suffering from nitrogen narcosis will always be aware that he is impaired -
ANSWER-False
the primary waste product from the metabolism of oxygen is _______ - ANSWER-CO2
the mechanisms of nitrogen narcosis are thought to be similar to _______ - ANSWER-
anesthesia
a stuporous condition characterized by impaired mental and physical performance and
changes in mood and behavior is known as_______ - ANSWER-nitrogen narcosis
Is argon in air essential to sustain life - ANSWER-No
The first precursor symptom of CNS oxygen toxicity is _____ - ANSWER-highly variable
For most persons, symptoms of hypoxia begin to appear when the PO2 falls below
_____ - ANSWER-0.16 ata
Acronym used to remember signs and symptoms of oxygen toxicity is - ANSWER-
ConVENTID
Con-vulsions
V-isual
E-ars
, N-ausea
T-witching
I-rritability
D-izziness
ODIGTML: on dives I go through my life - ANSWER-Oxygen, decompression, inert gas
narcosis, gas management, thermal, mission, logistics
the two most commonly used nitrox mixtures, also known as NOAA nitrox I and II are: -
ANSWER-32% and 36% oxygen
The danger of exceeding the maximum operating depth - ANSWER-CNS Oxygen
Toxicity
What is the best mix - ANSWER-highest percentage of oxygen that can be used at a
partial pressure of 1.4 at the planned dive depth
The maximum operating depth (MOD) of a gas mix is determined by - ANSWER-the
maximum acceptable pressure of oxygen
The best mix (not to exceed 40% O2 to use for an oxygen partial pressure limit of 1.6
ata on a dive to 27 msw (90 fsw) is - ANSWER-EAN40
What is the maximum operating depth for EAN32 at a ppo2 of 1.4 - ANSWER-34 msw
(111 fsw)
a diver using EAN32 makes a dive to 33 msw for 23 minutes. After surface interval of 2
hours they make a second dive with EAN32 to 23 msw. Using NAUI Ean32 dive tables,
the adjusted max dive time for the second dive is - ANSWER-11 minute
If the same diver using NAUI RGBM EAN32 dive tables, the max dive time for the
second dive would be - ANSWER-47 minutes
if flying or ascending to altitude after diving, wait ____ hours after a single dive and
_____ hours after a series of repetitive dives. Another good rule is to wait ____ hours
prior to flying or ascending to altitude - ANSWER-12, 18, 24
NAUI RGBM no calculation sea level tables may be used up to _________ of altitude -
ANSWER-610 m (2000 feet)
standard NAUI dive tables can be used up to altitudes of about - ANSWER-300 meters
(1000ft)
what is the equivalent air depth for 23 msw dive using EAN32 - ANSWER-18 msw (60
fsw)
