PADI OPEN WATER FINAL PAPER 2026
QUESTIONS AND VERIFIED 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
QUESTIONS AND VERIFIED 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
