PADI OPEN WATER DIVER FINAL EXAM 140
QUESTIONS & CORRECT ANSWERS LATEST 2025
As you descend in water the pressure - ANSWER-increases
A depth change of 10 meters/33 feet causes a pressure change of - ANSWER-2
bar/ata
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be
- ANSWER-2 liters
The density of the air at 20 meters/66 feet would be _______ the density at the
surface of - ANSWER-three times
A balloon fully inflated and sealed at 10 meters/33 feet, would probably
________ during ascent to the surface. - ANSWER-expand/burst
As I descend, increasing pressure affects my _________ - ANSWER-mask, ears,
sinuses
A squeeze is caused by - ANSWER-a pressure imbalance between the surrounding
pressure and an air space
Equalization is the process of - ANSWER-adding air to an air space
,I should equalize - ANSWER-before i feel pain or discomfort
I'm descending and discovering I can't equalize. The first thing I would do is -
ANSWER-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 - ANSWER-cancel the dive until I'm well
When scuba diving, normal breathing keeps your lungs equalized to the
surrounding pressure (T/F) - ANSWER-True
The most important rule in scuba diving is to - ANSWER-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) - ANSWER-true
During ascent I feel discomfort in my ears. I should - ANSWER-stop, descend
slightly and allow trapped air to work its way out
Depth 0m/0ft what is the pressure, volume and density - ANSWER-1 bar/ata, 1
volume, 1x density
Depth 10m/33ft what is the pressure, volume and density - ANSWER-2 bar/ata,
1/2 volume, 2x density
, Depth 20m/66ft what is the pressure, volume and density - ANSWER-3 bar/ata,
1/3 volume, 3x density
Depth 30m/99ft what is the pressure, volume and density - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-True
QUESTIONS & CORRECT ANSWERS LATEST 2025
As you descend in water the pressure - ANSWER-increases
A depth change of 10 meters/33 feet causes a pressure change of - ANSWER-2
bar/ata
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be
- ANSWER-2 liters
The density of the air at 20 meters/66 feet would be _______ the density at the
surface of - ANSWER-three times
A balloon fully inflated and sealed at 10 meters/33 feet, would probably
________ during ascent to the surface. - ANSWER-expand/burst
As I descend, increasing pressure affects my _________ - ANSWER-mask, ears,
sinuses
A squeeze is caused by - ANSWER-a pressure imbalance between the surrounding
pressure and an air space
Equalization is the process of - ANSWER-adding air to an air space
,I should equalize - ANSWER-before i feel pain or discomfort
I'm descending and discovering I can't equalize. The first thing I would do is -
ANSWER-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 - ANSWER-cancel the dive until I'm well
When scuba diving, normal breathing keeps your lungs equalized to the
surrounding pressure (T/F) - ANSWER-True
The most important rule in scuba diving is to - ANSWER-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) - ANSWER-true
During ascent I feel discomfort in my ears. I should - ANSWER-stop, descend
slightly and allow trapped air to work its way out
Depth 0m/0ft what is the pressure, volume and density - ANSWER-1 bar/ata, 1
volume, 1x density
Depth 10m/33ft what is the pressure, volume and density - ANSWER-2 bar/ata,
1/2 volume, 2x density
, Depth 20m/66ft what is the pressure, volume and density - ANSWER-3 bar/ata,
1/3 volume, 3x density
Depth 30m/99ft what is the pressure, volume and density - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-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 - ANSWER-True
