Unlocking the Depths: Your Comprehensive Guide
to Hyperbaric Study Questions.
An Ultimate Guide to Guaranteed Pass with top
Grade A+.
Latest Upgraded Guide 2025/2026
Pressure is defined as - ansThe force per unit area acting on a surface in a direction
perpendicular to that surface
Gas is defined as - ansA phase of matter
In the gas phase, the atoms or molecules basically move - ansRandomly
Liquids change to a gas at - anstheir respective boiling points
Hydraulics is a branch of science and engineering concerned with the mechanical properties
of - ansLiquids
When applying pressure to a fluid, the pressure is exerted - ansIn all directions equally
A mechanical gauge is used when measuring gas pressure in a sealed container. For all
common pressure gauges, the pressure indicated on the gauge is - ansLess than absolute
pressure because gauges (and gauge pressures) ignore the ambient (barometric) pressure
around us. They ony measure the extra pressure in the container.
Absolute pressure can be defined as - ansThe amount of pressure within the sealed vessel +
the amount of pressure outside the sealed vessel
Absolute pressure can also be defined as - ansGauge pressure + atmosphere, total pressure
and,true pressure.
1 atmosphere equals - ans760 mmHg<br>14.7 psi<br>33 fsw
The barometric pressure in Denver (elevation 5000 ft) is less than barometric pressure at sea
level - ansTrue
To convert from ATA to fsw - anssubtract 1, then multiply by 33
To convert ATA to mmHg - ansmultiply by 760 mmHg
To convert ATA to PSI - anssubtract 1, then multiply by 14.7
To convert FSW to ATA - ansdivide by 33, then add 1
Boyle's law is about the - anspressure-volume relationship
Which gas law has an inversely proportional relationship - ansBoyle's law
According to Boyle's law, (assuming the temperature remains constant) when the pressure
increases, the volume - ansDecreases proportionally
When applying boyle's Law to the human body, we worry about air-filled spaces being
shrunk (or squeezed) when pressure around the body increases. This particular type of
damage is known as. - ansBarotrauma
Boyle's Equation is - ansP1xV1= P2xV2
Charles law is about the - anstemperature-volume relationship
According to Charle's law, the volume in a flexible container,like a balloon, will ________
when the tempature increases (assuming the pressure remains constant). - ansIncrease
proportionally
According to Charle's law, the temperature in a flexible container, like a balloon, will______
when the volume increases (assuming the pressure remains constant) - ansIncrease
proportionally
Gay-Lussac's law is about - ansTemperature-pressure relationship
According to Gay-Lussac's law, the temperature in a rigid container, like a scuba tank or a
hyperbaric chamber, will______ when the pressure increases (assuming the volume remains
constant) - ansIncrease proportionally
,Unlocking the Depths: Your Comprehensive Guide
to Hyperbaric Study Questions.
An Ultimate Guide to Guaranteed Pass with top
Grade A+.
Latest Upgraded Guide 2025/2026
According to Gay-Lussac's law, the temperature in a rigid container,like a scuba tank or a
hyperbaric chamber, will _______ when the pressure decreases (assuming the volume
remains constant) - ansDecrease proportionally
Gay-Lussac's Law (in the hyperbaric chamber) is important to understand because when we
start increasing the pressure in the chamber, the patient is likely to - ansComplain of being
hot
Gay-Lussac's Law (in the hyperbaric chamber) is important to understand because when we
start decreasing the pressure in the chamber, the patient is likely to - ansComplain of being
cold
"Adiabatic heating" and "adiabatic cooling" refer to - ansThe temperature rise and
temperature drop when chamber pressure changes
GAy-Lussac's Law (in scuba diving) is important to understand because when we start
increasing the pressure in a scuba tank (during a refill at the scuba shop), the tank will get
_____ during the refill_____ while it sits at room temperature. This will cause the pressure of
gas in the cylinder to _______ - ansWarmer;cool;decrease
Gay-Lussac's Law ( in scuba diving) is important to understand because when we let a full
scuba cyllinder lay in the sun and heat up, the pressure in the tank will _______. This could
potentially cause_____. - ansIncrease; the scuba cyllinder to rupture
When working mathematical problems involving Charles' law law or Gay-Lussac's law, it is
necessary to convert the temperature from celcius to _____. To do this you _______ -
ansKelvin; add 237 degrees
When working mathematical problems involving Charles' law or Gay-Lussac's law, it is
necessary to convert the temperature from fahrenheit to______. To do this you______ -
ansRankine; add 460 degrees
Henry's law is about - ansGas in solution
A common example of Henry's law is - ansA newly opened bottle of soda
Henry's law is involved in all of the following except; - ansIncreased intracrainal pressure
The famous study that used the theory behind Henry's Law to keep pigs alive by dissolving
oxygen in the plasma of the blood after all the red blood cells had been removed was done by
- ansBoerema in 1960
Nitrogen nicrosis is often referred to as - ansRapture of the deep
true or false; Nitrogen narcosis is caused by breathing an increased partial pressure of
nitrogen above 2,000 mmHg - anstrue
true or false; Central nervous system oxygen toxicity is caused by breathing an increased
partial pressure of oxygen - ansTrue
true or false; Dalton's law states that the total pressure exerted by a mixture will increase
proportionally as the total pressure increases - ansTrue
Pascal's law is about - ansHydraulic pressure
"A bubble deep within the body's tissues responds to the pressure applied outside the body" is
a statement that exemplifies - ansPascal's Law
Graham's law is about - ansDiffusion of gases
Diffusion can be defined as - ansthe movement of particles from higher concentration to
lower concentration
, Unlocking the Depths: Your Comprehensive Guide
to Hyperbaric Study Questions.
An Ultimate Guide to Guaranteed Pass with top
Grade A+.
Latest Upgraded Guide 2025/2026
The maximum pressure acheived during a hyperbaric exposure is commonaly called the
"depth" or the "treatment pressure", or "the bottom". This is typically measured in -
ansabsolute atmospheres (ATA) feet of sea water (FSW) or millimeters of mercury (mmHg)
The components of gases in air is - ans79% nitrogen and 21% oxygen
The term ascent means - ansA decrease in pressure, decompression
<p>21% oxygen at 1 ATA is the same value as</p> - ans760 x 0.21= 159.6 mmHg oxygen
<p>79% nitrogen at 1 ATA is the same value as</p> - ans<p>600.4 mmHg of nitrogen
If you are giving your patient air to breathe at 2 ATA, what is the percentage of the oxygen
and nitrogen - ans319.2 mmHg O2; 1200.8mmHg nitrogen
<p>The partial pressure of O2 at 5 ATA is</p> - ans5 x 0.21= 1.05<br>1.05 atmospheres
(atm)
A balloon is inflated with 600cc of air, and then taken into the hyperbaric chamber. What will
be the volume of the balloon when it reaches 6 ATA? - ansif the pressure increases 6 times,
the volume will decrease to 1/6 of the original volume.<br>100cc
A balloon is inflated with 600cc of air, and then taken into the hyperbaric chamber. What will
be the volume of the balloon when it reaches, 6 ATA - ans1/6
A balloon with a volume of 3 liters is taken from 6 ATA to 3 ATA. WHat will the volume be
at 3 ATA. - ans6 liters
A skin diver with a lung volume of 6 liters makes a breath-hold dive from the surface. What
is the skin diver's lung volume when he reaches 33 fsw? - ans3 Liters,<br>If the pressure
increases to double the original pressure, the volume will decrease to 1/2 of the original
pressure.
A skin diver with a lung volume of 6L makes a breath hold dive from the surface. What is the
skin diver's lung volume when he reaches 33 fsw? - ans1/2 the original volume
If there is a bubble of gas occluding blood flow at 1 ATA, what chamber pressure is required
to reduce the diameter of the bubble to half the diameter? - ansmore than 6 ATA<br>the
formula for the volume of a sphere is V=4/3 xr3
If a carbonated beverage contains 10cc of dissolved gas at 2 ATA, how much gas remains in
solution when the beverage reaches sea level? (Assume equilibration at sea level) - ans5cc
<br>If the pressure decreases by half the original pressure, the amount of dissolved gas
decreases to 1/2 the original amount.
If a person breathing air at sea level has 1.5 L of dissolved in the plasma, how much would be
dissolved in plasma by breathing air at 33 FSW - ans3.0 Liters <br>It was asking about
dissolved gas, not a volume of gas. This problem calls for Henry's law, which is directly
proportional to the pressure.
A person stayed at 99 FSW long enough for her body to equilibrate to the level of nitrogen.
(assume 8 L of dissolved nitrogen at 99 fsw) When this person returns to the surface,
approximately how much nitrogen will remian? - ans2L<br>The absolute pressure becomes
1/4 of what it was, so the amount of dissolved gas is 1/4 of what it was. 1/4 of 8 is 2
A scuba tank is filled to 2043 PISG at 27 degree Celcius. Placed in the sun, it reaches 42
degree celcius. What is the pressure inside the heated tank? - ans2146 PSGI<br>27degree C=
300 Kelvin, 42 degree C= 315 Kelvin which means the absolute temp increased 5%. 2043
PSIG=140 ATA 5% of 140 =7<br>140+7 or 147 ATA 147 ATA=2146 PSI
to Hyperbaric Study Questions.
An Ultimate Guide to Guaranteed Pass with top
Grade A+.
Latest Upgraded Guide 2025/2026
Pressure is defined as - ansThe force per unit area acting on a surface in a direction
perpendicular to that surface
Gas is defined as - ansA phase of matter
In the gas phase, the atoms or molecules basically move - ansRandomly
Liquids change to a gas at - anstheir respective boiling points
Hydraulics is a branch of science and engineering concerned with the mechanical properties
of - ansLiquids
When applying pressure to a fluid, the pressure is exerted - ansIn all directions equally
A mechanical gauge is used when measuring gas pressure in a sealed container. For all
common pressure gauges, the pressure indicated on the gauge is - ansLess than absolute
pressure because gauges (and gauge pressures) ignore the ambient (barometric) pressure
around us. They ony measure the extra pressure in the container.
Absolute pressure can be defined as - ansThe amount of pressure within the sealed vessel +
the amount of pressure outside the sealed vessel
Absolute pressure can also be defined as - ansGauge pressure + atmosphere, total pressure
and,true pressure.
1 atmosphere equals - ans760 mmHg<br>14.7 psi<br>33 fsw
The barometric pressure in Denver (elevation 5000 ft) is less than barometric pressure at sea
level - ansTrue
To convert from ATA to fsw - anssubtract 1, then multiply by 33
To convert ATA to mmHg - ansmultiply by 760 mmHg
To convert ATA to PSI - anssubtract 1, then multiply by 14.7
To convert FSW to ATA - ansdivide by 33, then add 1
Boyle's law is about the - anspressure-volume relationship
Which gas law has an inversely proportional relationship - ansBoyle's law
According to Boyle's law, (assuming the temperature remains constant) when the pressure
increases, the volume - ansDecreases proportionally
When applying boyle's Law to the human body, we worry about air-filled spaces being
shrunk (or squeezed) when pressure around the body increases. This particular type of
damage is known as. - ansBarotrauma
Boyle's Equation is - ansP1xV1= P2xV2
Charles law is about the - anstemperature-volume relationship
According to Charle's law, the volume in a flexible container,like a balloon, will ________
when the tempature increases (assuming the pressure remains constant). - ansIncrease
proportionally
According to Charle's law, the temperature in a flexible container, like a balloon, will______
when the volume increases (assuming the pressure remains constant) - ansIncrease
proportionally
Gay-Lussac's law is about - ansTemperature-pressure relationship
According to Gay-Lussac's law, the temperature in a rigid container, like a scuba tank or a
hyperbaric chamber, will______ when the pressure increases (assuming the volume remains
constant) - ansIncrease proportionally
,Unlocking the Depths: Your Comprehensive Guide
to Hyperbaric Study Questions.
An Ultimate Guide to Guaranteed Pass with top
Grade A+.
Latest Upgraded Guide 2025/2026
According to Gay-Lussac's law, the temperature in a rigid container,like a scuba tank or a
hyperbaric chamber, will _______ when the pressure decreases (assuming the volume
remains constant) - ansDecrease proportionally
Gay-Lussac's Law (in the hyperbaric chamber) is important to understand because when we
start increasing the pressure in the chamber, the patient is likely to - ansComplain of being
hot
Gay-Lussac's Law (in the hyperbaric chamber) is important to understand because when we
start decreasing the pressure in the chamber, the patient is likely to - ansComplain of being
cold
"Adiabatic heating" and "adiabatic cooling" refer to - ansThe temperature rise and
temperature drop when chamber pressure changes
GAy-Lussac's Law (in scuba diving) is important to understand because when we start
increasing the pressure in a scuba tank (during a refill at the scuba shop), the tank will get
_____ during the refill_____ while it sits at room temperature. This will cause the pressure of
gas in the cylinder to _______ - ansWarmer;cool;decrease
Gay-Lussac's Law ( in scuba diving) is important to understand because when we let a full
scuba cyllinder lay in the sun and heat up, the pressure in the tank will _______. This could
potentially cause_____. - ansIncrease; the scuba cyllinder to rupture
When working mathematical problems involving Charles' law law or Gay-Lussac's law, it is
necessary to convert the temperature from celcius to _____. To do this you _______ -
ansKelvin; add 237 degrees
When working mathematical problems involving Charles' law or Gay-Lussac's law, it is
necessary to convert the temperature from fahrenheit to______. To do this you______ -
ansRankine; add 460 degrees
Henry's law is about - ansGas in solution
A common example of Henry's law is - ansA newly opened bottle of soda
Henry's law is involved in all of the following except; - ansIncreased intracrainal pressure
The famous study that used the theory behind Henry's Law to keep pigs alive by dissolving
oxygen in the plasma of the blood after all the red blood cells had been removed was done by
- ansBoerema in 1960
Nitrogen nicrosis is often referred to as - ansRapture of the deep
true or false; Nitrogen narcosis is caused by breathing an increased partial pressure of
nitrogen above 2,000 mmHg - anstrue
true or false; Central nervous system oxygen toxicity is caused by breathing an increased
partial pressure of oxygen - ansTrue
true or false; Dalton's law states that the total pressure exerted by a mixture will increase
proportionally as the total pressure increases - ansTrue
Pascal's law is about - ansHydraulic pressure
"A bubble deep within the body's tissues responds to the pressure applied outside the body" is
a statement that exemplifies - ansPascal's Law
Graham's law is about - ansDiffusion of gases
Diffusion can be defined as - ansthe movement of particles from higher concentration to
lower concentration
, Unlocking the Depths: Your Comprehensive Guide
to Hyperbaric Study Questions.
An Ultimate Guide to Guaranteed Pass with top
Grade A+.
Latest Upgraded Guide 2025/2026
The maximum pressure acheived during a hyperbaric exposure is commonaly called the
"depth" or the "treatment pressure", or "the bottom". This is typically measured in -
ansabsolute atmospheres (ATA) feet of sea water (FSW) or millimeters of mercury (mmHg)
The components of gases in air is - ans79% nitrogen and 21% oxygen
The term ascent means - ansA decrease in pressure, decompression
<p>21% oxygen at 1 ATA is the same value as</p> - ans760 x 0.21= 159.6 mmHg oxygen
<p>79% nitrogen at 1 ATA is the same value as</p> - ans<p>600.4 mmHg of nitrogen
If you are giving your patient air to breathe at 2 ATA, what is the percentage of the oxygen
and nitrogen - ans319.2 mmHg O2; 1200.8mmHg nitrogen
<p>The partial pressure of O2 at 5 ATA is</p> - ans5 x 0.21= 1.05<br>1.05 atmospheres
(atm)
A balloon is inflated with 600cc of air, and then taken into the hyperbaric chamber. What will
be the volume of the balloon when it reaches 6 ATA? - ansif the pressure increases 6 times,
the volume will decrease to 1/6 of the original volume.<br>100cc
A balloon is inflated with 600cc of air, and then taken into the hyperbaric chamber. What will
be the volume of the balloon when it reaches, 6 ATA - ans1/6
A balloon with a volume of 3 liters is taken from 6 ATA to 3 ATA. WHat will the volume be
at 3 ATA. - ans6 liters
A skin diver with a lung volume of 6 liters makes a breath-hold dive from the surface. What
is the skin diver's lung volume when he reaches 33 fsw? - ans3 Liters,<br>If the pressure
increases to double the original pressure, the volume will decrease to 1/2 of the original
pressure.
A skin diver with a lung volume of 6L makes a breath hold dive from the surface. What is the
skin diver's lung volume when he reaches 33 fsw? - ans1/2 the original volume
If there is a bubble of gas occluding blood flow at 1 ATA, what chamber pressure is required
to reduce the diameter of the bubble to half the diameter? - ansmore than 6 ATA<br>the
formula for the volume of a sphere is V=4/3 xr3
If a carbonated beverage contains 10cc of dissolved gas at 2 ATA, how much gas remains in
solution when the beverage reaches sea level? (Assume equilibration at sea level) - ans5cc
<br>If the pressure decreases by half the original pressure, the amount of dissolved gas
decreases to 1/2 the original amount.
If a person breathing air at sea level has 1.5 L of dissolved in the plasma, how much would be
dissolved in plasma by breathing air at 33 FSW - ans3.0 Liters <br>It was asking about
dissolved gas, not a volume of gas. This problem calls for Henry's law, which is directly
proportional to the pressure.
A person stayed at 99 FSW long enough for her body to equilibrate to the level of nitrogen.
(assume 8 L of dissolved nitrogen at 99 fsw) When this person returns to the surface,
approximately how much nitrogen will remian? - ans2L<br>The absolute pressure becomes
1/4 of what it was, so the amount of dissolved gas is 1/4 of what it was. 1/4 of 8 is 2
A scuba tank is filled to 2043 PISG at 27 degree Celcius. Placed in the sun, it reaches 42
degree celcius. What is the pressure inside the heated tank? - ans2146 PSGI<br>27degree C=
300 Kelvin, 42 degree C= 315 Kelvin which means the absolute temp increased 5%. 2043
PSIG=140 ATA 5% of 140 =7<br>140+7 or 147 ATA 147 ATA=2146 PSI
