PADI OPEN WATER BEING A DIVER 1 PRACTICE
TEST 2026 FULL SOLUTIONS REVIEW PACK
◉ 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 the air in your cylinder. Compared to the surface,
air supply lasts 1/#ata as long along with other factors
◉ What's the most efficient way to breathe dense air underwater?
Answer: Take slow, deep breaths
◉ How do I breathe to reduce anxiety when under stress?
Answer: Do NOT breathe faster - keep breathing slowly
TEST 2026 FULL SOLUTIONS REVIEW PACK
◉ 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 the air in your cylinder. Compared to the surface,
air supply lasts 1/#ata as long along with other factors
◉ What's the most efficient way to breathe dense air underwater?
Answer: Take slow, deep breaths
◉ How do I breathe to reduce anxiety when under stress?
Answer: Do NOT breathe faster - keep breathing slowly
