PADI Open Water Diver Final Exam Questions
with Detailed Verified Answers
As you descend in water the pressure Ans: increases
A depth change of 10 meters/33 feet causes a pressure change of Ans: 2 bar/ata
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be
Ans: 2 liters
The density of the air at 20 meters/66 feet would be _______ the density at the
surface of Ans: three times
A balloon fully inflated and sealed at 10 meters/33 feet, would probably ________
during ascent to the surface. Ans: expand/burst
As I descend, increasing pressure affects my _________ Ans: mask, ears, sinuses
A squeeze is caused by Ans: a pressure imbalance between the surrounding pressure
and an air space
Equalization is the process of Ans: adding air to an air space
I should equalize Ans: before i feel pain or discomfort
I'm descending and discovering I can't equalize. The first thing I would do is Ans: 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 Ans: cancel the dive until I'm well
,When scuba diving, normal breathing keeps your lungs equalized to the surrounding
pressure (T/F) Ans: True
The most important rule in scuba diving is to Ans: 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) Ans: true
During ascent I feel discomfort in my ears. I should Ans: stop, descend slightly and
allow trapped air to work its way out
Depth 0m/0ft what is the pressure, volume and density Ans: 1 bar/ata, 1 volume, 1x
density
Depth 10m/33ft what is the pressure, volume and density Ans: 2 bar/ata, 1/2 volume,
2x density
Depth 20m/66ft what is the pressure, volume and density Ans: 3 bar/ata, 1/3 volume,
3x density
Depth 30m/99ft what is the pressure, volume and density Ans: 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
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,c. Block my nose and blow forcefully for an extended period Ans: 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 Ans: 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
Ans: 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 Ans: True
During a descent, I try to equalize but discover I'm having trouble doing so. Which of
the following is correct?
a. Slow my descent, signal my buddy to slow down and equalize more forcefully
b. Stop my descent, signal my buddy to slow down and try again
c. Continue my descent while equalizing repeatedly
d. Signal my buddy, ascend to the surface and start my descent over the Ans: Stop my
descent, signal my buddy to slow down and try again
My buddy and I are planning a dive to 18m/60ft. We would expect our air supply to
last _______ at 10m/33ft, all else being the same.
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, a. longer than
b. shorter than
c. the same as Ans: shorter than
During a dive, I swim hard to keep up with the fish that interests me, but shortly I
begin to feel like I can't get enough air. The correct action would be to:
a. Signal my buddy and head up to the surface
b. Use the regulator purge button to boost air flow
c. Stop all activity and rest to restore proper deep, slow breathing Ans: Stop all
activity and rest to restore proper deep, slow breathing
An object that is neutrally buoyant in fresh water will ______ in salt water.
a. sink
b. float
c. be neutrally buoyant Ans: float
The ocean has more Ans: buoyancy compared to fresh water
The three overall benefits of the buddy system are practicality, safety, and fun. True or
False Ans: True
The primary considerations when choosing any piece of scuba gear are:
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with Detailed Verified Answers
As you descend in water the pressure Ans: increases
A depth change of 10 meters/33 feet causes a pressure change of Ans: 2 bar/ata
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be
Ans: 2 liters
The density of the air at 20 meters/66 feet would be _______ the density at the
surface of Ans: three times
A balloon fully inflated and sealed at 10 meters/33 feet, would probably ________
during ascent to the surface. Ans: expand/burst
As I descend, increasing pressure affects my _________ Ans: mask, ears, sinuses
A squeeze is caused by Ans: a pressure imbalance between the surrounding pressure
and an air space
Equalization is the process of Ans: adding air to an air space
I should equalize Ans: before i feel pain or discomfort
I'm descending and discovering I can't equalize. The first thing I would do is Ans: 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 Ans: cancel the dive until I'm well
,When scuba diving, normal breathing keeps your lungs equalized to the surrounding
pressure (T/F) Ans: True
The most important rule in scuba diving is to Ans: 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) Ans: true
During ascent I feel discomfort in my ears. I should Ans: stop, descend slightly and
allow trapped air to work its way out
Depth 0m/0ft what is the pressure, volume and density Ans: 1 bar/ata, 1 volume, 1x
density
Depth 10m/33ft what is the pressure, volume and density Ans: 2 bar/ata, 1/2 volume,
2x density
Depth 20m/66ft what is the pressure, volume and density Ans: 3 bar/ata, 1/3 volume,
3x density
Depth 30m/99ft what is the pressure, volume and density Ans: 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
© Get it right 2025 Getaway - Stuvia US All rights reserved
,c. Block my nose and blow forcefully for an extended period Ans: 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 Ans: 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
Ans: 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 Ans: True
During a descent, I try to equalize but discover I'm having trouble doing so. Which of
the following is correct?
a. Slow my descent, signal my buddy to slow down and equalize more forcefully
b. Stop my descent, signal my buddy to slow down and try again
c. Continue my descent while equalizing repeatedly
d. Signal my buddy, ascend to the surface and start my descent over the Ans: Stop my
descent, signal my buddy to slow down and try again
My buddy and I are planning a dive to 18m/60ft. We would expect our air supply to
last _______ at 10m/33ft, all else being the same.
© Get it right 2025 Getaway - Stuvia US All rights reserved
, a. longer than
b. shorter than
c. the same as Ans: shorter than
During a dive, I swim hard to keep up with the fish that interests me, but shortly I
begin to feel like I can't get enough air. The correct action would be to:
a. Signal my buddy and head up to the surface
b. Use the regulator purge button to boost air flow
c. Stop all activity and rest to restore proper deep, slow breathing Ans: Stop all
activity and rest to restore proper deep, slow breathing
An object that is neutrally buoyant in fresh water will ______ in salt water.
a. sink
b. float
c. be neutrally buoyant Ans: float
The ocean has more Ans: buoyancy compared to fresh water
The three overall benefits of the buddy system are practicality, safety, and fun. True or
False Ans: True
The primary considerations when choosing any piece of scuba gear are:
© Get it right 2025 Getaway - Stuvia US All rights reserved
