NAUI Nitrox Diver Test. Questions with
Correct Verified Answers. Latest 2026-
2027. 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." - ANSBoyle's
_____ is the highest percentage of oxygen that can be used at the planned
dive depth - ANSbest 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 -
ANSpressure swing absorption
_______ uses a semi-permeable membrane that allows oxygen to flow
through it more readily than nitrogen - ANSmembrane 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? - ANSHenry's Law
a diver suffering from nitrogen narcosis will always be aware that he is
impaired - ANSfalse
1
, 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? - ANS24 minutes
a stuporous condition characterized by impaired mental and physical
performance and changes in mood and behavior is known as -
ANSnitrogen narcosis
after the gas is analyzed and the cylinder is labeled, the diver must -
ANSdocument the fill by completing an entry in the fill log
all components of the ____ are required for a fire to take place - ANSfire
triangle
an essential operation in using an oxygen analyzer is - ANScalibrating it
an oxygen analyzer should display oxygen content to an accuracy of -
ANSone-tenth of one percent
any equipment that is used with pure oxygen or an oxygen level above
____ must be cleaned for oxygen service - ANS40%
as a gas is heated in a rigid closed container its pressure will -
ANSincrease
2
Correct Verified Answers. Latest 2026-
2027. 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." - ANSBoyle's
_____ is the highest percentage of oxygen that can be used at the planned
dive depth - ANSbest 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 -
ANSpressure swing absorption
_______ uses a semi-permeable membrane that allows oxygen to flow
through it more readily than nitrogen - ANSmembrane 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? - ANSHenry's Law
a diver suffering from nitrogen narcosis will always be aware that he is
impaired - ANSfalse
1
, 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? - ANS24 minutes
a stuporous condition characterized by impaired mental and physical
performance and changes in mood and behavior is known as -
ANSnitrogen narcosis
after the gas is analyzed and the cylinder is labeled, the diver must -
ANSdocument the fill by completing an entry in the fill log
all components of the ____ are required for a fire to take place - ANSfire
triangle
an essential operation in using an oxygen analyzer is - ANScalibrating it
an oxygen analyzer should display oxygen content to an accuracy of -
ANSone-tenth of one percent
any equipment that is used with pure oxygen or an oxygen level above
____ must be cleaned for oxygen service - ANS40%
as a gas is heated in a rigid closed container its pressure will -
ANSincrease
2
