DIVE SSI - SPECIALTY COURSE
ENRICHED AIR NITROX LEVEL 2
(40%) (SC-EAN)
What nitrox mixture can be used at any depth shallower than 99 feet? - Correct
Answers -EAN32
Compared to air, nitrox has a higher concentration of: - Correct Answers -Oxygen
Nitrox and the acronym EANx refer to mixtures with oxygen concentrations (FO2) higher
than: - Correct Answers -21
You can improve your safety while diving with nitrox by: - Correct Answers -Using the
same depth and time limitations as an air table or air computer
The major benefit of diving with nitrox is that it has a lower concentration of______,
which limits our time at depth. - Correct Answers -Nitrogen
Which of the following is true about diving with nitrox: - Correct Answers -Which of the
following is true about diving with nitrox:
Nitrox has more restrictive depth limitations than air
The generally-accepted threshold for CNS oxygen toxicity is at a ppO2 of: - Correct
Answers -1.1 ata
Any cylinder containing a gas other than air must be: - Correct Answers -Clearly labeled
Which rules and regulations do you have to follow if you want to use your equipment
with nitrox? - Correct Answers -Manufacturers specifications, local laws and regulations
To make sure your personal equipment is suitable for nitrox, you have to: - Correct
Answers -Ask your SSI Dive Center/Dive Professional if your equipment needs special
preparation/modification
What nitrox mixture can be used at any depth shallower than 99 feet? - Correct
Answers -EAN32
, Which gas adds many benefits to multi-level computer diving? - Correct Answers -Nitrox
Diving with nitrox has the potential to provide: - Correct Answers -longer no-
decompression limits and longer repetitive dives
A common misconception is that, when compared to air, nitrox enables divers to dive: -
Correct Answers -deeper
The two most commonly used nitrox mixtures in recreational diving are: - Correct
Answers -EAN32/EAN36
The air that we breathe consists mainly of: - Correct Answers -Nitrogen 78% / Oxygen
21%
Remaining within the recommended limiting ppO2 of 1.4 ata helps nitrox divers avoid: -
Correct Answers -Oxygen Toxicity
What is the best way to compare the levels of oxygen found in mixtures of our breathing
gas?: - Correct Answers -Partialp pressure of oxygen
Since CNS Oxygen Toxicity is among the greatest of risks in nitrox diving, you must be
able to recognize: - Correct Answers -Its warning signs and symptoms, both in yourself
and others
The risk of CNS Oxygen Toxicity becomes more substantial above: - Correct Answers -
The risk of CNS Oxygen Toxicity becomes more substantial above:
A ppO2 of 1.6 ata
If you notice symptoms of CNS oxygen toxicity in yourself or your buddy while
underwater, you should immediately begin: - Correct Answers -a controlled ascent
together
What is the primary sign of CNS Oxygen Toxicity that can cause the loss of the second
stage and drowning? - Correct Answers -Convulsions
How can the ppO2 of a breathing gas be calculated? - Correct Answers -Multiply
ambient pressure by the fraction of oxygen (FO2) found in the breathing gas.
The recommended limiting ppO2 and maximum limiting ppO2 for recreational nitrox
dives are: - Correct Answers -1.4/1.6
Oxygen can be toxic to all body tissues. Its most noticeable and immediate effects take
place in the: - Correct Answers -Lungs and central nervous system
ENRICHED AIR NITROX LEVEL 2
(40%) (SC-EAN)
What nitrox mixture can be used at any depth shallower than 99 feet? - Correct
Answers -EAN32
Compared to air, nitrox has a higher concentration of: - Correct Answers -Oxygen
Nitrox and the acronym EANx refer to mixtures with oxygen concentrations (FO2) higher
than: - Correct Answers -21
You can improve your safety while diving with nitrox by: - Correct Answers -Using the
same depth and time limitations as an air table or air computer
The major benefit of diving with nitrox is that it has a lower concentration of______,
which limits our time at depth. - Correct Answers -Nitrogen
Which of the following is true about diving with nitrox: - Correct Answers -Which of the
following is true about diving with nitrox:
Nitrox has more restrictive depth limitations than air
The generally-accepted threshold for CNS oxygen toxicity is at a ppO2 of: - Correct
Answers -1.1 ata
Any cylinder containing a gas other than air must be: - Correct Answers -Clearly labeled
Which rules and regulations do you have to follow if you want to use your equipment
with nitrox? - Correct Answers -Manufacturers specifications, local laws and regulations
To make sure your personal equipment is suitable for nitrox, you have to: - Correct
Answers -Ask your SSI Dive Center/Dive Professional if your equipment needs special
preparation/modification
What nitrox mixture can be used at any depth shallower than 99 feet? - Correct
Answers -EAN32
, Which gas adds many benefits to multi-level computer diving? - Correct Answers -Nitrox
Diving with nitrox has the potential to provide: - Correct Answers -longer no-
decompression limits and longer repetitive dives
A common misconception is that, when compared to air, nitrox enables divers to dive: -
Correct Answers -deeper
The two most commonly used nitrox mixtures in recreational diving are: - Correct
Answers -EAN32/EAN36
The air that we breathe consists mainly of: - Correct Answers -Nitrogen 78% / Oxygen
21%
Remaining within the recommended limiting ppO2 of 1.4 ata helps nitrox divers avoid: -
Correct Answers -Oxygen Toxicity
What is the best way to compare the levels of oxygen found in mixtures of our breathing
gas?: - Correct Answers -Partialp pressure of oxygen
Since CNS Oxygen Toxicity is among the greatest of risks in nitrox diving, you must be
able to recognize: - Correct Answers -Its warning signs and symptoms, both in yourself
and others
The risk of CNS Oxygen Toxicity becomes more substantial above: - Correct Answers -
The risk of CNS Oxygen Toxicity becomes more substantial above:
A ppO2 of 1.6 ata
If you notice symptoms of CNS oxygen toxicity in yourself or your buddy while
underwater, you should immediately begin: - Correct Answers -a controlled ascent
together
What is the primary sign of CNS Oxygen Toxicity that can cause the loss of the second
stage and drowning? - Correct Answers -Convulsions
How can the ppO2 of a breathing gas be calculated? - Correct Answers -Multiply
ambient pressure by the fraction of oxygen (FO2) found in the breathing gas.
The recommended limiting ppO2 and maximum limiting ppO2 for recreational nitrox
dives are: - Correct Answers -1.4/1.6
Oxygen can be toxic to all body tissues. Its most noticeable and immediate effects take
place in the: - Correct Answers -Lungs and central nervous system
