OPEN WATER DIVER ACTUAL QUESTIONS
AND CORRECT ANSWERS COMPLETE
STUDY GUIDE
●● 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
AND CORRECT ANSWERS COMPLETE
STUDY GUIDE
●● 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
