7/12/25, 8:37 PM PADI Open Water Diver Certification
PADI OPEN WATER DIVER CERTIFICATION ACTUAL
EXAM 2025-2026 LATEST VERSION \UPDATED
QUESTIONS AND CORRECT DETAILED ANSWERS
\VERIFIED 100% \ALREADY GRADED A+ \BRAND
NEW 2025
SCUBA Self contained underwater breathing apparatus
What is the pressure change 1 bar/1 ata/1 atmosphere
for each 10m/33ft of depth
change?
What is the relationship The deeper you go in water, the more the
between my depth in water pressure increases Pressure is
and the pressure? expressed as the weight of air
What is the relationship As pressure increases, the gas volume decreases and the gas
between pressure, density increases
and the volume and the
density of air?
If I take a volume of air Volume will be
from one depth to another 1/ata# Density
depth, how much will the will be ata#
volume and density
change?
What 3 major body air spaces Ears, sinuses, mask
does
increasing pressure affect as I
descend?
What is a "squeeze"? The discomfort caused by pressure imbalance pulling 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 gently,
How do I equalize as I or wiggle your jaw and swallow
descend? For mask, blow into it with nose
1/1
3
, 7/12/25, 8:37 PM PADI Open Water Diver Certification
How often should I equalize? Every meter/few feet, BEFORE you feel discomfort
What should I do if I can't Stop your descent, signal problem and point to your ear, ascend
equalize? a bit, and try again
What can happen if I don't or Fluid can rupture the eardrum
can't equalize gently and Bruising around the face can occur
keep descending?
Why does a congestion from Congestion might block normal air flow, making equalization
a cold or difficult or impossible
allergy temporarily keep me
from diving?
Why should I never dive with They create air spaces that you can't equalize
earplugs?
What other body air spaces In filled teeth - go to a dentist
are affected by increasing In a dry suit - learn from an
pressure? How do I equalize instructor Lungs - breathe
them? normally and continuously
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?
What is a "reverse block"? When expanding air becomes trapped in your body air spaces as
you ascend
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, intestines, its way out
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 reduce Do NOT breathe faster - keep breathing slowly
anxiety when under stress?
2/1
3
PADI OPEN WATER DIVER CERTIFICATION ACTUAL
EXAM 2025-2026 LATEST VERSION \UPDATED
QUESTIONS AND CORRECT DETAILED ANSWERS
\VERIFIED 100% \ALREADY GRADED A+ \BRAND
NEW 2025
SCUBA Self contained underwater breathing apparatus
What is the pressure change 1 bar/1 ata/1 atmosphere
for each 10m/33ft of depth
change?
What is the relationship The deeper you go in water, the more the
between my depth in water pressure increases Pressure is
and the pressure? expressed as the weight of air
What is the relationship As pressure increases, the gas volume decreases and the gas
between pressure, density increases
and the volume and the
density of air?
If I take a volume of air Volume will be
from one depth to another 1/ata# Density
depth, how much will the will be ata#
volume and density
change?
What 3 major body air spaces Ears, sinuses, mask
does
increasing pressure affect as I
descend?
What is a "squeeze"? The discomfort caused by pressure imbalance pulling 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 gently,
How do I equalize as I or wiggle your jaw and swallow
descend? For mask, blow into it with nose
1/1
3
, 7/12/25, 8:37 PM PADI Open Water Diver Certification
How often should I equalize? Every meter/few feet, BEFORE you feel discomfort
What should I do if I can't Stop your descent, signal problem and point to your ear, ascend
equalize? a bit, and try again
What can happen if I don't or Fluid can rupture the eardrum
can't equalize gently and Bruising around the face can occur
keep descending?
Why does a congestion from Congestion might block normal air flow, making equalization
a cold or difficult or impossible
allergy temporarily keep me
from diving?
Why should I never dive with They create air spaces that you can't equalize
earplugs?
What other body air spaces In filled teeth - go to a dentist
are affected by increasing In a dry suit - learn from an
pressure? How do I equalize instructor Lungs - breathe
them? normally and continuously
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?
What is a "reverse block"? When expanding air becomes trapped in your body air spaces as
you ascend
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, intestines, its way out
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 reduce Do NOT breathe faster - keep breathing slowly
anxiety when under stress?
2/1
3
