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NAUI NITROX Exam Study Guide – Practice Questions with Verified Answers. GRADED A+. Latest 2026/2027 Update.

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NAUI NITROX Exam Study Guide – Practice Questions with Verified Answers. GRADED A+. Latest 2026/2027 Update. NAUI NITROX Exam Study Guide – Practice Questions with Verified Answers. GRADED A+. Latest 2026/2027 Update. NAUI NITROX Exam Study Guide – Practice Questions with Verified Answers. GRADED A+. Latest 2026/2027 Update.

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NAUI NITROX Exam Study
Guide – Practice Questions
with Verified Answers. GRADED
A+. Latest 2026/2027 Update.



What is nitrox? - Ans✔✔-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 - Ans✔✔-longer, required surface interval



excess nitrogen is the cause of ----- - Ans✔✔-decompression sickness


Development of Nitrox began in what year? The same year the first diving
decompression tables were published - Ans✔✔-1908


What year did NAUI indorse EANx and official accept certifications from two
specialized nitrox training agencies - Ans✔✔-1992

, What year did NAUI codify standards for enriched air nitrox training and
certification? - Ans✔✔-1996


Advantages of nitrox include...
-extended bottom times
-shorter surface intervals
increased safety factor when used with air tables



true or false? - Ans✔✔-true


TRUE or FALSE
Nitrox is the same as trimix and its used to reduce the effects of narcosis that a
diver might feel. - Ans✔✔-FALSE



Other terms for NOAA Nitrox I and II - Ans✔✔-I=EAN32, II-EAN36


TRUE or FALSE
All of these terms refer to the same breathing mixture
- EAN36
NOAA Nitrox II
Nitrox 36%

35% oxygen mixture - Ans✔✔-TRUE



nitrox is a _____ breathing gas - Ans✔✔-mid-range
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