.//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
PADI Open Water Diver Certification Final
Exam 2026/2027 | Complete Exam Review |
Practice Questions & Detailed Answer
Explanations | PADI Scuba Diving Exam
Preparation
As you descend in water the pressure
increases
A depth change of 10 meters/33 feet causes a pressure change of
2 bar/ata
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be
2 liters
The density of the air at 20 meters/66 feet would be _______ the density at the surface of
three times
A balloon fully inflated and sealed at 10 meters/33 feet, would probably ________ during ascent
to the surface.
expand/burst
,.//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
As I descend, increasing pressure affects my _________
mask, ears, sinuses
A squeeze is caused by
a pressure imbalance between the surrounding pressure and an air space
Equalization is the process of
adding air to an air space
I should equalize
before i feel pain or discomfort
I'm descending and discovering I can't equalize. The first thing I would do is
stop my descent and signal my buddy/the instructor
On a day I plan to go diving, I wake up with my sinuses blocked due to a cold or allergy. I should
cancel the dive until I'm well
,.//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
When scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure
(T/F)
True
The most important rule in scuba diving is to
breathe continuously and never hold your breath
Failure to follow the most important rule in scuba diving can cause severe lung overexpansion
injuries, which can result in paralysis or death (T/F)
true
During ascent I feel discomfort in my ears. I should
stop, descend slightly and allow trapped air to work its way out
Depth 0m/0ft what is the pressure, volume and density
1 bar/ata, 1 volume, 1x density
Depth 10m/33ft what is the pressure, volume and density
2 bar/ata, 1/2 volume, 2x density
Depth 20m/66ft what is the pressure, volume and density
3 bar/ata, 1/3 volume, 3x density
, .//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
Depth 30m/99ft what is the pressure, volume and density
4 bar/ata, 1/4 volume, 4x density
As I descend, I need to equalize air spaces. Which of the following are accepted ways of
equalizing my ears?
a. Block my nose and attempt to gently blow through it.
b. Swallow and wiggle the jaw from side to side
c. Block my nose and blow forcefully for an extended period
Block my nose and attempt to gently blow through it + swallow and wiggle the jaw from side to
side
I should equalize
a. early and often, before I feel discomfort
b. when I begin to feel discomfort
c. only if I experience pain
early and often, before I feel discomfort
I should not dive with a cold, nor use medications to dive with a cold. True or False
True
Failure to follow the most important rule in scuba diving can cause serious lung overexpansion
(lung rupture) injuries, which in turn can cause paralysis and death. True or False
PADI Open Water Diver Certification Final
Exam 2026/2027 | Complete Exam Review |
Practice Questions & Detailed Answer
Explanations | PADI Scuba Diving Exam
Preparation
As you descend in water the pressure
increases
A depth change of 10 meters/33 feet causes a pressure change of
2 bar/ata
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be
2 liters
The density of the air at 20 meters/66 feet would be _______ the density at the surface of
three times
A balloon fully inflated and sealed at 10 meters/33 feet, would probably ________ during ascent
to the surface.
expand/burst
,.//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
As I descend, increasing pressure affects my _________
mask, ears, sinuses
A squeeze is caused by
a pressure imbalance between the surrounding pressure and an air space
Equalization is the process of
adding air to an air space
I should equalize
before i feel pain or discomfort
I'm descending and discovering I can't equalize. The first thing I would do is
stop my descent and signal my buddy/the instructor
On a day I plan to go diving, I wake up with my sinuses blocked due to a cold or allergy. I should
cancel the dive until I'm well
,.//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
When scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure
(T/F)
True
The most important rule in scuba diving is to
breathe continuously and never hold your breath
Failure to follow the most important rule in scuba diving can cause severe lung overexpansion
injuries, which can result in paralysis or death (T/F)
true
During ascent I feel discomfort in my ears. I should
stop, descend slightly and allow trapped air to work its way out
Depth 0m/0ft what is the pressure, volume and density
1 bar/ata, 1 volume, 1x density
Depth 10m/33ft what is the pressure, volume and density
2 bar/ata, 1/2 volume, 2x density
Depth 20m/66ft what is the pressure, volume and density
3 bar/ata, 1/3 volume, 3x density
, .//.//.,…//////////./././././.;;;../.;.//;./.;./;.;.;/
Depth 30m/99ft what is the pressure, volume and density
4 bar/ata, 1/4 volume, 4x density
As I descend, I need to equalize air spaces. Which of the following are accepted ways of
equalizing my ears?
a. Block my nose and attempt to gently blow through it.
b. Swallow and wiggle the jaw from side to side
c. Block my nose and blow forcefully for an extended period
Block my nose and attempt to gently blow through it + swallow and wiggle the jaw from side to
side
I should equalize
a. early and often, before I feel discomfort
b. when I begin to feel discomfort
c. only if I experience pain
early and often, before I feel discomfort
I should not dive with a cold, nor use medications to dive with a cold. True or False
True
Failure to follow the most important rule in scuba diving can cause serious lung overexpansion
(lung rupture) injuries, which in turn can cause paralysis and death. True or False
