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NAUI Nitrox Exam Prep (New 2024/ 2025
Update) Questions and Verified Answers|
100% Correct| A Grade
QUESTION
The Signs and Symptoms of DCS Do Not Vary and Can Be Easily Identified No Matter The
Injury or Severity of The Case (T/F)
Answer:
False
QUESTION
Central nervous system toxicity
Answer:
CNS toxicity can result from relatively short exposures to high partial pressures of oxygen.
QUESTION
The other type is called pulmonary toxicity or whole body toxicity
Answer:
Pulmonary toxicity results from prolonged exposure to elevated partial pressures of oxygen
(above about 0.5 atmosphere). As the name implies, its most pronounced effects are on the lungs,
producing signs and symptoms such as chest tightness, breathing discomfort and pain, shortness
of breath, and coughing. Development of pulmonary toxicity requires long-term exposures such
as encountered in saturation diving, certain military and commercial diving, or recompression
chamber treatment.
QUESTION
Pulmonary toxicity is not a concern of the recreational nitrox diver; CNS toxicity is a concern.
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Answer:
QUESTION
Using the NOAA Oxygen Exposure limits the 24 hour limit at the maximum recreational partial
pressure of oxygen (PPO2) is 200 minutes (T/F)
Answer:
False
QUESTION
Match each statement True or False:
Answer:
The mechanisms of nitrogen narcosis are thought to be similar to Anethesia: True
A diver suffering from nitrogen narcosis will always be aware that he/she is impaired: False
Argon in air is essential to sustain life: False
The primary waste product from the metabolism of oxygen is Carbon dioxide: True
A stuporous condition characterized by impaired mental and physical performance and changes
in mood and behavior is known as nitrogen narcosis: True
QUESTION
For most persons, symptoms of hypoxia begin to appear when the PO2
______________________
Answer:
Falls below about 0.16 ata
QUESTION
The acronym used to remember signs and symptoms of oxygen toxicity is:
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Answer:
Con-Convulsions
V-Visual
E-Ears
N-Nausea
T-Twitching
I-Irritability
D-Dizziness
QUESTION
The Recommended maximum PO2 for recreational enriched air nitrox diving is ___________
with a contingency of __________________
Answer:
1.4, 1.6
QUESTION
The first precursor symptoms of CNS oxygen toxicity is ___________________________
Answer:
Highly Variable
QUESTION
The ODIGTML order was originally determined to account for the most potentially serious
physiological concerns facing every diver on every dive (T/F)
Answer:
T
QUESTION
Calculating maximum operating depth with EAN 36:
https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch
NAUI Nitrox Exam Prep (New 2024/ 2025
Update) Questions and Verified Answers|
100% Correct| A Grade
QUESTION
The Signs and Symptoms of DCS Do Not Vary and Can Be Easily Identified No Matter The
Injury or Severity of The Case (T/F)
Answer:
False
QUESTION
Central nervous system toxicity
Answer:
CNS toxicity can result from relatively short exposures to high partial pressures of oxygen.
QUESTION
The other type is called pulmonary toxicity or whole body toxicity
Answer:
Pulmonary toxicity results from prolonged exposure to elevated partial pressures of oxygen
(above about 0.5 atmosphere). As the name implies, its most pronounced effects are on the lungs,
producing signs and symptoms such as chest tightness, breathing discomfort and pain, shortness
of breath, and coughing. Development of pulmonary toxicity requires long-term exposures such
as encountered in saturation diving, certain military and commercial diving, or recompression
chamber treatment.
QUESTION
Pulmonary toxicity is not a concern of the recreational nitrox diver; CNS toxicity is a concern.
https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch
,https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch
Answer:
QUESTION
Using the NOAA Oxygen Exposure limits the 24 hour limit at the maximum recreational partial
pressure of oxygen (PPO2) is 200 minutes (T/F)
Answer:
False
QUESTION
Match each statement True or False:
Answer:
The mechanisms of nitrogen narcosis are thought to be similar to Anethesia: True
A diver suffering from nitrogen narcosis will always be aware that he/she is impaired: False
Argon in air is essential to sustain life: False
The primary waste product from the metabolism of oxygen is Carbon dioxide: True
A stuporous condition characterized by impaired mental and physical performance and changes
in mood and behavior is known as nitrogen narcosis: True
QUESTION
For most persons, symptoms of hypoxia begin to appear when the PO2
______________________
Answer:
Falls below about 0.16 ata
QUESTION
The acronym used to remember signs and symptoms of oxygen toxicity is:
https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch
, https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch
Answer:
Con-Convulsions
V-Visual
E-Ears
N-Nausea
T-Twitching
I-Irritability
D-Dizziness
QUESTION
The Recommended maximum PO2 for recreational enriched air nitrox diving is ___________
with a contingency of __________________
Answer:
1.4, 1.6
QUESTION
The first precursor symptoms of CNS oxygen toxicity is ___________________________
Answer:
Highly Variable
QUESTION
The ODIGTML order was originally determined to account for the most potentially serious
physiological concerns facing every diver on every dive (T/F)
Answer:
T
QUESTION
Calculating maximum operating depth with EAN 36:
https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch https://www.stuvia.com/user/allatopnotch
