NAUI Nitrox Diver Exam Questions with Verified
Answers.
The ______ in the air you are breathing limits the time you can stay at depth - ANS
nitrogen
In the early twentieth century, a quantitative model for nitrogen loading and dive tables
were developed by - ANS John Scott Haldane
We say that nitrogen is an inert gas. This means - ANS our bodies do not use the
nitrogen we breathe
Credit for developing and introducing nitrox diving techniques for standard scuba goes
to - ANS Dr. Morgan Wells
NAUI sanctioned enriched air nitrox training in - ANS 1992
Two benefits of diving with nitrox are - ANS longer dive times and shorter surface
intervals
What does the "x" stand for in the term Eon? - ANS the percentage of oxygen in the mix
In 1878, Paul Bert established that_____, liberated as bubbles following sudden
decompression was the cause of decompression sickness - ANS nitrogen
Nitrox is a _____ breathing gas - ANS mid-range
Nitrox provides the greatest advantages for dives in the _____ depth range - ANS 15-33
m (50-110 ft.)
As a gas is heated in a rigid closed container its pressure will - ANS increase
"If one quantity of gas will dissolve at one atmosphere of pressure, then three quantities
of gas will dissolve at three atmospheres." this statement refers to which law? - ANS
Henry's Law
Atmospheric pressure can be measured in many ways. What is one atmosphere in
millimeters of mercury? - ANS 760 mmHg
The ____ of a specific gas in a mix is the portion of the total pressure exerted by that
gas - ANS partial pressure
What is the absolute pressure at 17 maw (56 few)? - ANS 2.7 at
, What is the oxygen partial pressure in EAN35 at a depth of 26 maw (85 few)? - ANS 1.3
at
If the oxygen partial pressure in your mix is 1.3 at at a depth of 37 maw (122 few), what
is the fraction of oxygen in the mix? - ANS 0.28
What is the partial pressure of oxygen in air at a depth of 21 maw (69 few)? - ANS 0.65
at
The symptoms of nitrogen narcosis parallel those often seen in - ANS alcohol
intoxication
____ Law states: "at a constant temperature, the volume of a gas varies inversely with
absolute pressure, while the density of a gas varies directly with absolute pressure." -
ANS Boyle's
Each 10 meters (33 feet) that you descend in the ocean adds another atmosphere of
pressure to the one atmosphere of surface pressure - ANS true
A diver suffering from nitrogen narcosis will always be aware that he is impaired - ANS
false
The mechanisms of nitrogen narcosis are thought to be similar to - ANS anesthesia
The controlled release of pressure during ascent from a scuba dive is - ANS
decompression
Which gas in air is essential to sustain life? - ANS oxygen
The primary waste product from the metabolism of oxygen is - ANS carbon dioxide
For most people, symptoms of hypoxia begin to appear when the PO2 - ANS falls below
about 0.16 at
Pulmonary oxygen toxicity results from - ANS prolonged exposure to elevated oxygen
partial pressures
One of the factors that can increase susceptibility to CNS oxygen toxicity is - ANS
heavy exercise and carbon dioxide buildup
The acronym used to remember signs and symptoms of oxygen toxicity is - ANS
Convent ID
The recommended maximum PO2 for enriched air nitrox diving is - ANS 1.4 at
The benefits of buying summaries with Stuvia:
Guaranteed quality through customer reviews
Stuvia customers have reviewed more than 700,000 summaries. This how you know that you are buying the best documents.
Quick and easy check-out
You can quickly pay through credit card or Stuvia-credit for the summaries. There is no membership needed.
Focus on what matters
Your fellow students write the study notes themselves, which is why the documents are always reliable and up-to-date. This ensures you quickly get to the core!
Frequently asked questions
What do I get when I buy this document?
You get a PDF, available immediately after your purchase. The purchased document is accessible anytime, anywhere and indefinitely through your profile.
Satisfaction guarantee: how does it work?
Our satisfaction guarantee ensures that you always find a study document that suits you well. You fill out a form, and our customer service team takes care of the rest.
Who am I buying these notes from?
Stuvia is a marketplace, so you are not buying this document from us, but from seller Lectjoe. Stuvia facilitates payment to the seller.
Will I be stuck with a subscription?
No, you only buy these notes for $22.49. You're not tied to anything after your purchase.