PADI OPEN WATER DIVER EXAMINATION TEST
2026 QUESTIONS WITH CORRECT ANSWERS
GRADED A+
● What is the pressure change for each 10m/33ft of depth change?
Answer: 1 bar/1 ata/1 atmosphere
● What is the relationship between my depth in water and the pressure?
Answer: The deeper you go in water, the more the pressure increases
Pressure is expressed as the weight of air
● What is the relationship between pressure, and the volume and the
density of air? Answer: As pressure increases, the gas volume decreases
and the gas density increases
● If I take a volume of air from one depth to another depth, how much
will the volume and density change? Answer: Volume will be 1/ata#
Density will be ata#
● What 3 major body air spaces does increasing pressure affect as I
descend? Answer: Ears, sinuses, mask
,● What is a "squeeze"? Answer: The discomfort caused by pressure
imbalance pulling tissue into the air space
● What is "equalization"? Answer: The addition of air to your air spaces
as you descend
● How do I equalize as I descend? Answer: For ears and sinuses, pinch
your nose and blow gently, or wiggle your jaw and swallow
For mask, blow into it with nose
● How often should I equalize? Answer: Every meter/few feet,
BEFORE you feel discomfort
● What should I do if I can't equalize? Answer: Stop your descent,
signal problem and point to your ear, ascend a bit, and try again
● What can happen if I don't or can't equalize gently and keep
descending? Answer: Fluid can rupture the eardrum
Bruising around the face can occur
● Why does a congestion from a cold or allergy temporarily keep me
from diving? Answer: Congestion might block normal air flow, making
equalization difficult or impossible
, ● Why should I never dive with earplugs? Answer: They create air
spaces that you can't equalize
● What other body air spaces are affected by increasing pressure? How
do I equalize them? Answer: In filled teeth - go to a dentist
In a dry suit - learn from an instructor
Lungs - breathe normally and continuously
● What is the most important rule in scuba diving? Answer: Breathe
continuously and never hold your breath
● What can happen if I don't follow the most important rule in scuba
diving? Answer: Your lungs will over expand and rupture
● What is a "reverse block"? Answer: When expanding air becomes
trapped in your body air spaces as you ascend
● What should I do if I feel discomfort in my ears, sinuses, stomach,
intestines, or teeth while ascending? Answer: Stop your ascent and
descend a meter/few feet to reduce discomfort and give trapped air time
to work its way out
● How does depth affect how long my air supply lasts? Answer: The
deeper you are, the more dense air you breathe, and the faster you use
2026 QUESTIONS WITH CORRECT ANSWERS
GRADED A+
● What is the pressure change for each 10m/33ft of depth change?
Answer: 1 bar/1 ata/1 atmosphere
● What is the relationship between my depth in water and the pressure?
Answer: The deeper you go in water, the more the pressure increases
Pressure is expressed as the weight of air
● What is the relationship between pressure, and the volume and the
density of air? Answer: As pressure increases, the gas volume decreases
and the gas density increases
● If I take a volume of air from one depth to another depth, how much
will the volume and density change? Answer: Volume will be 1/ata#
Density will be ata#
● What 3 major body air spaces does increasing pressure affect as I
descend? Answer: Ears, sinuses, mask
,● What is a "squeeze"? Answer: The discomfort caused by pressure
imbalance pulling tissue into the air space
● What is "equalization"? Answer: The addition of air to your air spaces
as you descend
● How do I equalize as I descend? Answer: For ears and sinuses, pinch
your nose and blow gently, or wiggle your jaw and swallow
For mask, blow into it with nose
● How often should I equalize? Answer: Every meter/few feet,
BEFORE you feel discomfort
● What should I do if I can't equalize? Answer: Stop your descent,
signal problem and point to your ear, ascend a bit, and try again
● What can happen if I don't or can't equalize gently and keep
descending? Answer: Fluid can rupture the eardrum
Bruising around the face can occur
● Why does a congestion from a cold or allergy temporarily keep me
from diving? Answer: Congestion might block normal air flow, making
equalization difficult or impossible
, ● Why should I never dive with earplugs? Answer: They create air
spaces that you can't equalize
● What other body air spaces are affected by increasing pressure? How
do I equalize them? Answer: In filled teeth - go to a dentist
In a dry suit - learn from an instructor
Lungs - breathe normally and continuously
● What is the most important rule in scuba diving? Answer: Breathe
continuously and never hold your breath
● What can happen if I don't follow the most important rule in scuba
diving? Answer: Your lungs will over expand and rupture
● What is a "reverse block"? Answer: When expanding air becomes
trapped in your body air spaces as you ascend
● What should I do if I feel discomfort in my ears, sinuses, stomach,
intestines, or teeth while ascending? Answer: Stop your ascent and
descend a meter/few feet to reduce discomfort and give trapped air time
to work its way out
● How does depth affect how long my air supply lasts? Answer: The
deeper you are, the more dense air you breathe, and the faster you use
