NITROX EXAM QUESTIONS AND
ANSWERS
Air -Answer-78% Nitrogen, 21% Oxygen
What is Nitrox -Answer-Gas mixture with less Nitrogen (usually more Oxygen)
Nitrox other names -Answer-Oxygen enriched air, Enriched air nitrox, Nitrox, EANx.
"nitrox" can refer to any mixture of nitrogen and oxygen, so plain, ordinary air would
be nitrox, and in the past nitrox has even been used to refer to nitrogen-oxygen
mixtures with less oxygen than air that were used in undersea habitat diving. -
Answer-
Place The Historical Nitrox Events in Chronological Order -Answer-The First Diving
Decompression Tables were published
NAUI endorsed EANX Endorsing Two Specialized Training Agencies
Other Recreational Training Agencies Announced They Would Offer Nitrox
NAUI codified Standards For Enriched Air Nitrox Training and Certification
The Advantages of using Nitrox Include: -Answer-Extended Bottom Times
Shorter Surface Interval
Increased Safety Factor When Used With Air Tables
Nitrox is the same as Trimix and its used to reduce the effects of narcosis that a
diver might feel (T/F) -Answer-False
All of these terms refer to the same breathing mixture (T/F)
- EAN36
-NOAA Nitrox II
-Nitrox 36%
-36% Oxygen Mixture -Answer-
Nitrox is a ____________ breathing gas -Answer-Mid Range
In _____, Paul Bert established that ___________, liberated as bubbles following
sudden decompression was the cause of decompression sickness. -Answer-1878,
Nitrogen
, Nitrox provides the greatest advantages for dives in the __________________ depth
ranges -Answer-15-33m (50-110 ft)
Using Boyles law we can easily know that if you compared two 11 liter (80 cubic foot)
scuba cylinders with different pressures to the one with double the pressure also has
a greater volume of gas (T/F) -Answer-True
Henry's Law -Answer-The amount of any given gas that will dissolve in a liquid at a
given temperature is a function of the partial pressure of the gas that is in contact
with the liquid and the solubility coefficient of the gas in the particular liquid."
Henry's Law addresses the quantity of a gas that will dissolve, and describes the rate
at which the gas will dissolve (T/F) -Answer-False, it does not describe the rate at
which gas disolves
Dalton Law States -Answer-The total pressure exerted by a mixture of gases is equal
to the sum of the pressures that would be exerted by each of the gases if it alone
were present and occupied the volume.
According to Daltons law, the pressure exerted by each gas mixture will add up to
the total pressure of gas (T/F) -Answer-True
Converting between depth and pressure by formula (Metric) -Answer-P barabsolute
= (D msw / 10 msw/bar ) + 1 bar = [(D msw + 10 msw) / 10msw/bar]
P= absolute pressure (ATA)D= Depth in meters
Converting absolute pressure to depth is the reverse:
D msw = (P barabsolute - 1 bar) x 10 msw/bar
Converting between depth and pressure by formula (Imperial) -Answer-P ata = (D
fsw / 33 fsw/atm) + 1 atm = {(D fsw + 33 fsw) / 33 fsw/atm}
P= absolute pressure (ATA)D= Depth in feet
Converting absolute pressure to depth is the reverse:
D fsw = (P ata - 1 atm) x 33 fsw/atm
Partial Pressure formula (If you know the partial pressure and the total pressure) -
Answer-Fg = Pg/Ptotal
Partial Pressure formula (If you know the partial pressure and fraction/percentage of
the gas) -Answer-Ptotal = Pg/Fg
Using diving terms, partial pressure is calculated as: partial pressure = (total
absolute pressure) × (volume fraction of gas component) For the component gas "i":
pi = P × F. -Answer-
If a gas is heated in a rigid closed container the pressure will _____________ -
Answer-Increase
ANSWERS
Air -Answer-78% Nitrogen, 21% Oxygen
What is Nitrox -Answer-Gas mixture with less Nitrogen (usually more Oxygen)
Nitrox other names -Answer-Oxygen enriched air, Enriched air nitrox, Nitrox, EANx.
"nitrox" can refer to any mixture of nitrogen and oxygen, so plain, ordinary air would
be nitrox, and in the past nitrox has even been used to refer to nitrogen-oxygen
mixtures with less oxygen than air that were used in undersea habitat diving. -
Answer-
Place The Historical Nitrox Events in Chronological Order -Answer-The First Diving
Decompression Tables were published
NAUI endorsed EANX Endorsing Two Specialized Training Agencies
Other Recreational Training Agencies Announced They Would Offer Nitrox
NAUI codified Standards For Enriched Air Nitrox Training and Certification
The Advantages of using Nitrox Include: -Answer-Extended Bottom Times
Shorter Surface Interval
Increased Safety Factor When Used With Air Tables
Nitrox is the same as Trimix and its used to reduce the effects of narcosis that a
diver might feel (T/F) -Answer-False
All of these terms refer to the same breathing mixture (T/F)
- EAN36
-NOAA Nitrox II
-Nitrox 36%
-36% Oxygen Mixture -Answer-
Nitrox is a ____________ breathing gas -Answer-Mid Range
In _____, Paul Bert established that ___________, liberated as bubbles following
sudden decompression was the cause of decompression sickness. -Answer-1878,
Nitrogen
, Nitrox provides the greatest advantages for dives in the __________________ depth
ranges -Answer-15-33m (50-110 ft)
Using Boyles law we can easily know that if you compared two 11 liter (80 cubic foot)
scuba cylinders with different pressures to the one with double the pressure also has
a greater volume of gas (T/F) -Answer-True
Henry's Law -Answer-The amount of any given gas that will dissolve in a liquid at a
given temperature is a function of the partial pressure of the gas that is in contact
with the liquid and the solubility coefficient of the gas in the particular liquid."
Henry's Law addresses the quantity of a gas that will dissolve, and describes the rate
at which the gas will dissolve (T/F) -Answer-False, it does not describe the rate at
which gas disolves
Dalton Law States -Answer-The total pressure exerted by a mixture of gases is equal
to the sum of the pressures that would be exerted by each of the gases if it alone
were present and occupied the volume.
According to Daltons law, the pressure exerted by each gas mixture will add up to
the total pressure of gas (T/F) -Answer-True
Converting between depth and pressure by formula (Metric) -Answer-P barabsolute
= (D msw / 10 msw/bar ) + 1 bar = [(D msw + 10 msw) / 10msw/bar]
P= absolute pressure (ATA)D= Depth in meters
Converting absolute pressure to depth is the reverse:
D msw = (P barabsolute - 1 bar) x 10 msw/bar
Converting between depth and pressure by formula (Imperial) -Answer-P ata = (D
fsw / 33 fsw/atm) + 1 atm = {(D fsw + 33 fsw) / 33 fsw/atm}
P= absolute pressure (ATA)D= Depth in feet
Converting absolute pressure to depth is the reverse:
D fsw = (P ata - 1 atm) x 33 fsw/atm
Partial Pressure formula (If you know the partial pressure and the total pressure) -
Answer-Fg = Pg/Ptotal
Partial Pressure formula (If you know the partial pressure and fraction/percentage of
the gas) -Answer-Ptotal = Pg/Fg
Using diving terms, partial pressure is calculated as: partial pressure = (total
absolute pressure) × (volume fraction of gas component) For the component gas "i":
pi = P × F. -Answer-
If a gas is heated in a rigid closed container the pressure will _____________ -
Answer-Increase
