2026 Public Health CPH Exam Study Guide with Verified
Solutions
As you descend in water the pressure - ANSWERincreases
A depth change of 10 meters/33 feet causes a pressure change of - ANSWER2
bar/ata
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume
will be - ANSWER2 liters
The density of the air at 20 meters/66 feet would be _______ the density at
the surface of - ANSWERthree times
A balloon fully inflated and sealed at 10 meters/33 feet, would probably
________ during ascent to the surface. - ANSWERexpand/burst
As I descend, increasing pressure affects my _________ - ANSWERmask, ears,
sinuses
A squeeze is caused by - ANSWERa pressure imbalance between the
surrounding pressure and an air space
Equalization is the process of - ANSWERadding air to an air space
,I should equalize - ANSWERbefore i feel pain or discomfort
I'm descending and discovering I can't equalize. The first thing I would do is -
ANSWERstop my descent and signal my buddy/the instructor
On a day I plan to go diving, I wake up with my sinuses blocked due to a cold
or allergy. I should - ANSWERcancel the dive until I'm well
When scuba diving, normal breathing keeps your lungs equalized to the
surrounding pressure (T/F) - ANSWERTrue
The most important rule in scuba diving is to - ANSWERbreathe continuously
and never hold your breath
Failure to follow the most important rule in scuba diving can cause severe
lung overexpansion injuries, which can result in paralysis or death (T/F) -
ANSWERtrue
During ascent I feel discomfort in my ears. I should - ANSWERstop, descend
slightly and allow trapped air to work its way out
Depth 0m/0ft what is the pressure, volume and density - ANSWER1 bar/ata, 1
volume, 1x density
Depth 10m/33ft what is the pressure, volume and density - ANSWER2
bar/ata, 1/2 volume, 2x density
, Depth 20m/66ft what is the pressure, volume and density - ANSWER3
bar/ata, 1/3 volume, 3x density
Depth 30m/99ft what is the pressure, volume and density - ANSWER4
bar/ata, 1/4 volume, 4x density
As I descend, I need to equalize air spaces. Which of the following are
accepted ways of equalizing my ears?
a. Block my nose and attempt to gently blow through it.
b. Swallow and wiggle the jaw from side to side
c. Block my nose and blow forcefully for an extended period - ANSWERBlock
my nose and attempt to gently blow through it + swallow and wiggle the jaw
from side to side
I should equalize
a. early and often, before I feel discomfort
b. when I begin to feel discomfort
c. only if I experience pain - ANSWERearly and often, before I feel discomfort
I should not dive with a cold, nor use medications to dive with a cold. True or
False - ANSWERTrue
Failure to follow the most important rule in scuba diving can cause serious
lung overexpansion (lung rupture) injuries, which in turn can cause paralysis
and death. True or False - ANSWERTrue
Solutions
As you descend in water the pressure - ANSWERincreases
A depth change of 10 meters/33 feet causes a pressure change of - ANSWER2
bar/ata
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume
will be - ANSWER2 liters
The density of the air at 20 meters/66 feet would be _______ the density at
the surface of - ANSWERthree times
A balloon fully inflated and sealed at 10 meters/33 feet, would probably
________ during ascent to the surface. - ANSWERexpand/burst
As I descend, increasing pressure affects my _________ - ANSWERmask, ears,
sinuses
A squeeze is caused by - ANSWERa pressure imbalance between the
surrounding pressure and an air space
Equalization is the process of - ANSWERadding air to an air space
,I should equalize - ANSWERbefore i feel pain or discomfort
I'm descending and discovering I can't equalize. The first thing I would do is -
ANSWERstop my descent and signal my buddy/the instructor
On a day I plan to go diving, I wake up with my sinuses blocked due to a cold
or allergy. I should - ANSWERcancel the dive until I'm well
When scuba diving, normal breathing keeps your lungs equalized to the
surrounding pressure (T/F) - ANSWERTrue
The most important rule in scuba diving is to - ANSWERbreathe continuously
and never hold your breath
Failure to follow the most important rule in scuba diving can cause severe
lung overexpansion injuries, which can result in paralysis or death (T/F) -
ANSWERtrue
During ascent I feel discomfort in my ears. I should - ANSWERstop, descend
slightly and allow trapped air to work its way out
Depth 0m/0ft what is the pressure, volume and density - ANSWER1 bar/ata, 1
volume, 1x density
Depth 10m/33ft what is the pressure, volume and density - ANSWER2
bar/ata, 1/2 volume, 2x density
, Depth 20m/66ft what is the pressure, volume and density - ANSWER3
bar/ata, 1/3 volume, 3x density
Depth 30m/99ft what is the pressure, volume and density - ANSWER4
bar/ata, 1/4 volume, 4x density
As I descend, I need to equalize air spaces. Which of the following are
accepted ways of equalizing my ears?
a. Block my nose and attempt to gently blow through it.
b. Swallow and wiggle the jaw from side to side
c. Block my nose and blow forcefully for an extended period - ANSWERBlock
my nose and attempt to gently blow through it + swallow and wiggle the jaw
from side to side
I should equalize
a. early and often, before I feel discomfort
b. when I begin to feel discomfort
c. only if I experience pain - ANSWERearly and often, before I feel discomfort
I should not dive with a cold, nor use medications to dive with a cold. True or
False - ANSWERTrue
Failure to follow the most important rule in scuba diving can cause serious
lung overexpansion (lung rupture) injuries, which in turn can cause paralysis
and death. True or False - ANSWERTrue
