7/23/25, 8:26 AM PADI Open Water Diver Certification EXAM | ACTUAL exam: QUESTION AND ANSWERS UPDATED 2025 LATEST Flashcards | Q…
PADI Open Water Diver Certification EXAM |
ACTUAL exam: QUESTION AND ANSWERS
UPDATED 2025 LATEST
Save
Terms in this set (167)
SCUBA Self contained underwater breathing apparatus
What is the pressure 1 bar/1 ata/1 atmosphere
change for each 10m/33ft
of depth change?
What is the relationship The deeper you go in water, the more the pressure
between my depth in increases
water and the pressure? Pressure is expressed as the weight of air
What is the relationship As pressure increases, the gas volume decreases and
between pressure, and the the gas density increases
volume and the density of
air?
If I take a volume of air Volume will be 1/ata#
from one depth to another Density will be ata#
depth, how much will the
volume and density
change?
What 3 major body air Ears, sinuses, mask
spaces does increasing
pressure affect as I
descend?
https://quizlet.com/1061782936/padi-open-water-diver-certification-exam-actual-exam-question-and-answers-updated-2025-latest-flash-cards/?new 1/17
,7/23/25, 8:26 AM PADI Open Water Diver Certification EXAM | ACTUAL exam: QUESTION AND ANSWERS UPDATED 2025 LATEST Flashcards | Q…
The discomfort caused by pressure imbalance pulling
What is a "squeeze"?
tissue into the air space
What is "equalization"? The addition of air to your air spaces as you descend
For ears and sinuses, pinch your nose and blow
How do I equalize as I
gently, or wiggle your jaw and swallow
descend?
For mask, blow into it with nose
How often should I Every meter/few feet, BEFORE you feel discomfort
equalize?
What should I do if I can't Stop your descent, signal problem and point to your
equalize? ear, ascend a bit, and try again
What can happen if I don't Fluid can rupture the eardrum
or can't equalize gently Bruising around the face can occur
and keep descending?
Why does a congestion Congestion might block normal air flow, making
from a cold or allergy equalization difficult or impossible
temporarily keep me from
diving?
Why should I never dive They create air spaces that you can't equalize
with earplugs?
What other body air In filled teeth - go to a dentist
spaces are affected by In a dry suit - learn from an instructor
increasing pressure? How Lungs - breathe normally and continuously
do I equalize them?
What is the most Breathe continuously and never hold your breath
important rule in scuba
diving?
What can happen if I don't Your lungs will over expand and rupture
follow the most important
rule in scuba diving?
When expanding air becomes trapped in your body
What is a "reverse block"?
air spaces as you ascend
https://quizlet.com/1061782936/padi-open-water-diver-certification-exam-actual-exam-question-and-answers-updated-2025-latest-flash-cards/?new 2/17
, 7/23/25, 8:26 AM PADI Open Water Diver Certification EXAM | ACTUAL exam: QUESTION AND ANSWERS UPDATED 2025 LATEST Flashcards | Q…
What should I do if I feel Stop your ascent and descend a meter/few feet to
discomfort in my ears, reduce discomfort and give trapped air time to work
sinuses, stomach, its way out
intestines, or teeth while
ascending?
The deeper you are, the more dense air you breathe,
How does depth affect
and the faster you use the air in your cylinder.
how long my air supply
Compared to the surface, air supply lasts 1/#ata as
lasts?
long along with other factors
What's the most efficient Take slow, deep breaths
way to breathe dense air
underwater?
How do I breathe to Do NOT breathe faster - keep breathing slowly
reduce anxiety when
under stress?
1. Breathe continuously and never hold your breath
2. Breathe slowly and deeply
What are my 4 breathing
3. Don't allow yourself to get winded or out of breath
rules as a scuba diver?
4. If faced with a problem, stop, and reduce anxiety
by breathing slowly and deeply
An upward force acting on an object in the water,
What is buoyancy?
canceling the pull of gravity
The upwards force is caused by the water displaced
What causes buoyancy? by the object, and is equal to the weight of displaced
water
The object weighs less than the water it displaces, so
positive buoyancy
it floats
The object weighs the same as the water it displaces,
neutral buoyancy
neither sinking nor floating
The object weighs more than the water it displaces, so
negative buoyancy
it sinks
https://quizlet.com/1061782936/padi-open-water-diver-certification-exam-actual-exam-question-and-answers-updated-2025-latest-flash-cards/?new 3/17
PADI Open Water Diver Certification EXAM |
ACTUAL exam: QUESTION AND ANSWERS
UPDATED 2025 LATEST
Save
Terms in this set (167)
SCUBA Self contained underwater breathing apparatus
What is the pressure 1 bar/1 ata/1 atmosphere
change for each 10m/33ft
of depth change?
What is the relationship The deeper you go in water, the more the pressure
between my depth in increases
water and the pressure? Pressure is expressed as the weight of air
What is the relationship As pressure increases, the gas volume decreases and
between pressure, and the the gas density increases
volume and the density of
air?
If I take a volume of air Volume will be 1/ata#
from one depth to another Density will be ata#
depth, how much will the
volume and density
change?
What 3 major body air Ears, sinuses, mask
spaces does increasing
pressure affect as I
descend?
https://quizlet.com/1061782936/padi-open-water-diver-certification-exam-actual-exam-question-and-answers-updated-2025-latest-flash-cards/?new 1/17
,7/23/25, 8:26 AM PADI Open Water Diver Certification EXAM | ACTUAL exam: QUESTION AND ANSWERS UPDATED 2025 LATEST Flashcards | Q…
The discomfort caused by pressure imbalance pulling
What is a "squeeze"?
tissue into the air space
What is "equalization"? The addition of air to your air spaces as you descend
For ears and sinuses, pinch your nose and blow
How do I equalize as I
gently, or wiggle your jaw and swallow
descend?
For mask, blow into it with nose
How often should I Every meter/few feet, BEFORE you feel discomfort
equalize?
What should I do if I can't Stop your descent, signal problem and point to your
equalize? ear, ascend a bit, and try again
What can happen if I don't Fluid can rupture the eardrum
or can't equalize gently Bruising around the face can occur
and keep descending?
Why does a congestion Congestion might block normal air flow, making
from a cold or allergy equalization difficult or impossible
temporarily keep me from
diving?
Why should I never dive They create air spaces that you can't equalize
with earplugs?
What other body air In filled teeth - go to a dentist
spaces are affected by In a dry suit - learn from an instructor
increasing pressure? How Lungs - breathe normally and continuously
do I equalize them?
What is the most Breathe continuously and never hold your breath
important rule in scuba
diving?
What can happen if I don't Your lungs will over expand and rupture
follow the most important
rule in scuba diving?
When expanding air becomes trapped in your body
What is a "reverse block"?
air spaces as you ascend
https://quizlet.com/1061782936/padi-open-water-diver-certification-exam-actual-exam-question-and-answers-updated-2025-latest-flash-cards/?new 2/17
, 7/23/25, 8:26 AM PADI Open Water Diver Certification EXAM | ACTUAL exam: QUESTION AND ANSWERS UPDATED 2025 LATEST Flashcards | Q…
What should I do if I feel Stop your ascent and descend a meter/few feet to
discomfort in my ears, reduce discomfort and give trapped air time to work
sinuses, stomach, its way out
intestines, or teeth while
ascending?
The deeper you are, the more dense air you breathe,
How does depth affect
and the faster you use the air in your cylinder.
how long my air supply
Compared to the surface, air supply lasts 1/#ata as
lasts?
long along with other factors
What's the most efficient Take slow, deep breaths
way to breathe dense air
underwater?
How do I breathe to Do NOT breathe faster - keep breathing slowly
reduce anxiety when
under stress?
1. Breathe continuously and never hold your breath
2. Breathe slowly and deeply
What are my 4 breathing
3. Don't allow yourself to get winded or out of breath
rules as a scuba diver?
4. If faced with a problem, stop, and reduce anxiety
by breathing slowly and deeply
An upward force acting on an object in the water,
What is buoyancy?
canceling the pull of gravity
The upwards force is caused by the water displaced
What causes buoyancy? by the object, and is equal to the weight of displaced
water
The object weighs less than the water it displaces, so
positive buoyancy
it floats
The object weighs the same as the water it displaces,
neutral buoyancy
neither sinking nor floating
The object weighs more than the water it displaces, so
negative buoyancy
it sinks
https://quizlet.com/1061782936/padi-open-water-diver-certification-exam-actual-exam-question-and-answers-updated-2025-latest-flash-cards/?new 3/17
