NAUI INSTRUCTOR SCHOOL QUESTIONS AND CORRECT
ANSWERS NEWEST 2025/2026 GUARANTEED PASS
Alpha flag represents
A vessel restricted in its ability to maneuver
Which of the following is not part of the cylinder valve?
Diaphragm
Burst disc assembly
Prevents cylinder rupture in the event of over pressurization
Benefit of a Capillary tube depth gage
Automatically provides equivalent depth readings
When used at higher elevations
First stage filters that appear green in color may be an
indication of what?
,Corrosion from moisture in the cylinder
Boyles Law
Pressure increases as volume decreases
IVERSLEY PROPORTUNATE
Index marks on a compass
Temporarily mark the bearing that is indicated by the north-
seeking needle
Where does gas exchange occur in the body
Alveolar-capillary membrane
Two main benefits to Nitrox
Longer dive times & Shorter SIT
,Inert gas means
Our bodies do not use the gas
Daltons Law
The partial pressure of any gas in a mixture is directly related
to the fraction of the gas in the total mixture
Central Nervous System (CNS) Oxygen Toxicity results from:
Relatively short exposures to high oxygen partial pressures
Conventid (oxygen poisoning)
Convulsions
Vision (blurriness)
Ears (ringing)
Nausea
Twitching
Irritability
Dizziness
, The maximum contingency partial pressure of oxygen (PO2)
for diving nitrox is
1.6 ATA
MOD
Maximum Operating Depth - calculated by the partial pressure
of oxygen
Nitrox mixing methods
Partial pressure blending
Nitrogen separating membrane
Continuous gas blending
An oxygen analyzer should display oxygen content to an
accuracy of:
1/10 of a percent
Kelvin scale
Absolute temperature scale based on the Celsius scale
ANSWERS NEWEST 2025/2026 GUARANTEED PASS
Alpha flag represents
A vessel restricted in its ability to maneuver
Which of the following is not part of the cylinder valve?
Diaphragm
Burst disc assembly
Prevents cylinder rupture in the event of over pressurization
Benefit of a Capillary tube depth gage
Automatically provides equivalent depth readings
When used at higher elevations
First stage filters that appear green in color may be an
indication of what?
,Corrosion from moisture in the cylinder
Boyles Law
Pressure increases as volume decreases
IVERSLEY PROPORTUNATE
Index marks on a compass
Temporarily mark the bearing that is indicated by the north-
seeking needle
Where does gas exchange occur in the body
Alveolar-capillary membrane
Two main benefits to Nitrox
Longer dive times & Shorter SIT
,Inert gas means
Our bodies do not use the gas
Daltons Law
The partial pressure of any gas in a mixture is directly related
to the fraction of the gas in the total mixture
Central Nervous System (CNS) Oxygen Toxicity results from:
Relatively short exposures to high oxygen partial pressures
Conventid (oxygen poisoning)
Convulsions
Vision (blurriness)
Ears (ringing)
Nausea
Twitching
Irritability
Dizziness
, The maximum contingency partial pressure of oxygen (PO2)
for diving nitrox is
1.6 ATA
MOD
Maximum Operating Depth - calculated by the partial pressure
of oxygen
Nitrox mixing methods
Partial pressure blending
Nitrogen separating membrane
Continuous gas blending
An oxygen analyzer should display oxygen content to an
accuracy of:
1/10 of a percent
Kelvin scale
Absolute temperature scale based on the Celsius scale
