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NAUI Nitrox Diver Questions and Answers Graded A+
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NAUI Nitrox Diver Questions and Answers Graded A+
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NAUI Nitrox Diver Questions andAnswers Graded A+
____ 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." -
ANSWER-Boyle's
_____ is the highest percentage of oxygen that can be used at the planned dive depth -
ANSWER-best mix
______ uses a material called a molecular sieve that selectively adsorbs a thin layer of
nitrogen from the air that passes over or through it - ANSWER-pressure swing
absorption
_______ uses a semi-permeable membrane that allows oxygen to flow through it more
readily than nitrogen - ANSWER-membrane separation
"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? -
ANSWER-Henry's Law
a diver suffering from nitrogen narcosis will always be aware that he is impaired -
ANSWER-false
a diver using EAN32 makes a dive to 33 msw (110 fsw) for 23 minutes. After a surface
interval of 2 hours, he makes a second dive (also using EAN32) to 23 msw (75 fsw).
using NAUI EAN32 dive tables, what is his adjusted maximum dive time for the second
dive? - ANSWER-24 minutes
a stuporous condition characterized by impaired mental and physical performance and
changes in mood and behavior is known as - ANSWER-nitrogen narcosis
after the gas is analyzed and the cylinder is labeled, the diver must - ANSWER-
document the fill by completing an entry in the fill log
all components of the ____ are required for a fire to take place - ANSWER-fire triangle
an essential operation in using an oxygen analyzer is - ANSWER-calibrating it
an oxygen analyzer should display oxygen content to an accuracy of - ANSWER-one-
tenth of one percent
, any equipment that is used with pure oxygen or an oxygen level above ____ must be
cleaned for oxygen service - ANSWER-40%
as a gas is heated in a rigid closed container its pressure will - ANSWER-increase
atmospheric pressure can be measured in many ways. what is one atmosphere in
millimeters of mercury? - ANSWER-760 mmHg
calculate the normal maximum operating depth for EAN32 (PO2 = 1.4 ata) - ANSWER-
34 msw (111 fsw)
credit for developing and introducing nitrox diving techniques for standard scuba goes to
- ANSWER-Dr. Morgan Wells
cylinders and tank valves to be used with enriched air must be cleaned and ____
lubricants used - ANSWER-oxygen-compatible
dive computers offer the advantage of giving the diver - ANSWER-"credit" for the
shallow portions of the dive
each 10 meters (33 feet) that you descend in the ocean adds another atmosphere of
pressure to the one atmosphere of surface pressure - ANSWER-true
even though you will not be using nitrox mixtures above 40% oxygen, your cylinder
should be oxygen cleaned and identified as a nitrox cylinder because - ANSWER-it may
be subjected to pure oxygen at elevated pressures when it is filled
for most people, symptoms of hypoxia begin to appear when the PO2 - ANSWER-falls
below about 0.16 ata
if flying or ascending to altitude after diving, wait ____ hours after a single dive and
_____ hours after a series of repetitive dives - ANSWER-12; 18
if the oxygen partial pressure in your mix is 1.3 ata at a depth of 37 msw (122 fsw), what
is the fraction of oxygen in the mix? - ANSWER-0.28
if the same diver in question 1 were using NAUI RGBM EAN32 dive tables, what would
be his maximum dive time for the second dive? - ANSWER-47 minutes
if using the NAUI RGBM dive tables, a minimum surface interval of ____ is required -
ANSWER-1 hour
in _______ mixing, a measured pressure of oxygen is added to a cylinder, which is then
filled to service pressure with air - ANSWER-partial pressure
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