ENRICHED AIR NITROX UPDATED EXAMS SCRIPT
QUESTIONS AND ANSWERS SURE A+
✔✔The smallest ppO2 value on the SSI CNS Clock Exposure Time Table is 0.6. A
conservative approach to tracking oxygen exposure is to treat dives with a ppO2 of 0.5
and less as?
A) If they are equal to 0.6
B) If they are equal to 32%
C) If they are less than 0.6
D) If they are equal to 36% - ✔✔If they are equal to 0.6
✔✔The single most important aspect of managing your exposure to oxygen is,
controlling the intensity of that exposure by determining:
A) A maximum operating depth (MOD), based on a limiting ppO2 of 1.4 bar or less
B) The depth of the last dive
C) A maximum operating depth (MOD), based on limiting ppO2 of 1.6 bar or more
D) A maximum operating depth (MOD), based on a limiting fraction of oxygen FO2 of
.32 or more - ✔✔A maximum operating depth (MOD), based on a limiting ppO2 of 1.4
bar or less
✔✔As a key factor, you have to decide which method you use for diving with nitrox to
achieve:
A) Less exposure to carbon dioxide and more fun
B) More dive time and to ensure a greater safety margin
C) More dive time or to ensure a greater safety margin
D) Less dive time and no safety margin - ✔✔More dive time OR to ensure a greater
safety margin
✔✔If you experience a computer failure underwater, you should.
, A) Signal your buddy and ascend with your buddy while he/she monitors your ascent on
their computer
B) Do not enter the water again for at least 24 hours and watch for the signs of
Decompression Sickness (DCS)
C) Perform a longer than normal safety stop if air supply permits as an added
precaution
D) All answers are correct - ✔✔All answers are correct
✔✔Diving with nitrox reduces the exposure to nitrogen, therefore you can`t get
decompression sickness while diving nitrox. Right or Wrong?
A) Wrong
B) Right - ✔✔Wrong
✔✔ Remaining within the recommended limiting ppO2 of 1.4 bar helps nitrox divers to
avoid:
A) Helium Narcosis
B) Oxygen Toxicity
C) Decompression Illness
D) Nitrogen Narcosis - ✔✔Oxygen Toxicity
✔✔A common misconception is, that compared to air, Nitrox enables Divers to dive:
A) More shallow
B) Longer
C) Deeper
D) Shorter - ✔✔Deeper
✔✔Diving Nitrox has which potential to provide?
A) longer no-decompression limits, longer repetitive dives
B) shorter decompression limits, shorter repetitive dives
C) longer decompression limits, shorter decompression dives
D) longer no-decompression dives, shorter repetitive dives - ✔✔longer no-
decompression limits, longer repetitive dives
✔✔The air that we breathe consist mainly of:
A) Oxygen 78%/Nitrogen 21%
B) 50% Nitrogen/ 50% Oxygen
C) 100% Oxygen
D) Oxygen 21%/ Nitrogen 78% - ✔✔Oxygen 21%/ Nitrogen 78%
QUESTIONS AND ANSWERS SURE A+
✔✔The smallest ppO2 value on the SSI CNS Clock Exposure Time Table is 0.6. A
conservative approach to tracking oxygen exposure is to treat dives with a ppO2 of 0.5
and less as?
A) If they are equal to 0.6
B) If they are equal to 32%
C) If they are less than 0.6
D) If they are equal to 36% - ✔✔If they are equal to 0.6
✔✔The single most important aspect of managing your exposure to oxygen is,
controlling the intensity of that exposure by determining:
A) A maximum operating depth (MOD), based on a limiting ppO2 of 1.4 bar or less
B) The depth of the last dive
C) A maximum operating depth (MOD), based on limiting ppO2 of 1.6 bar or more
D) A maximum operating depth (MOD), based on a limiting fraction of oxygen FO2 of
.32 or more - ✔✔A maximum operating depth (MOD), based on a limiting ppO2 of 1.4
bar or less
✔✔As a key factor, you have to decide which method you use for diving with nitrox to
achieve:
A) Less exposure to carbon dioxide and more fun
B) More dive time and to ensure a greater safety margin
C) More dive time or to ensure a greater safety margin
D) Less dive time and no safety margin - ✔✔More dive time OR to ensure a greater
safety margin
✔✔If you experience a computer failure underwater, you should.
, A) Signal your buddy and ascend with your buddy while he/she monitors your ascent on
their computer
B) Do not enter the water again for at least 24 hours and watch for the signs of
Decompression Sickness (DCS)
C) Perform a longer than normal safety stop if air supply permits as an added
precaution
D) All answers are correct - ✔✔All answers are correct
✔✔Diving with nitrox reduces the exposure to nitrogen, therefore you can`t get
decompression sickness while diving nitrox. Right or Wrong?
A) Wrong
B) Right - ✔✔Wrong
✔✔ Remaining within the recommended limiting ppO2 of 1.4 bar helps nitrox divers to
avoid:
A) Helium Narcosis
B) Oxygen Toxicity
C) Decompression Illness
D) Nitrogen Narcosis - ✔✔Oxygen Toxicity
✔✔A common misconception is, that compared to air, Nitrox enables Divers to dive:
A) More shallow
B) Longer
C) Deeper
D) Shorter - ✔✔Deeper
✔✔Diving Nitrox has which potential to provide?
A) longer no-decompression limits, longer repetitive dives
B) shorter decompression limits, shorter repetitive dives
C) longer decompression limits, shorter decompression dives
D) longer no-decompression dives, shorter repetitive dives - ✔✔longer no-
decompression limits, longer repetitive dives
✔✔The air that we breathe consist mainly of:
A) Oxygen 78%/Nitrogen 21%
B) 50% Nitrogen/ 50% Oxygen
C) 100% Oxygen
D) Oxygen 21%/ Nitrogen 78% - ✔✔Oxygen 21%/ Nitrogen 78%
