PADI Open Water Questions And 100% Correct
Answers Latest Update
SCUBA - ANSWER Self contained underwater breathing apparatus
What is the pressure change for every 10m/33ft of depth change? - ANSWER 1 bar/1
ata/1 atmosphere
What is the relation 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 relation of pressure, to the volume and the density of air? ANSWER As
pressure 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 act upon as I descend? -
ANSWER Ears, sinuses, mask
What is a "squeeze"? - ANSWER The discomfort of tissue being pulled into the air space
by a pressure imbalance
What is "equalization"? - ANSWER Adding air to your air spaces as you descend
Equalise while descending how? - 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 equalise? - ANSWER Every meter/few feet, BEFORE you feel discomfort
What if you can't equalise? - ANSWER Stop your descent, signal problem and point to
your ear, ascend a bit, and try again
What could happen if I fail to, or am unable to, equalize gently and continue my descent?
- ANSWER Fluid may rupture the eardrum Bruising of the face may occur
Why does a congestion from a cold or allergy temporarily prevent me from diving? -
ANSWER Congestion may block normal air flow preventing equalization
Why must I never dive wearing earplugs? - ANSWER They introduce air spaces you
cannot 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
If I break the most fundamental of all scuba diving rules, what might happen? - ANSWER
Your lungs will over inflate and burst
What is a "reverse block"? - ANSWER Trapped expanding air in your body air spaces
during ascent
, What should I do if I have discomfort in my ears, sinuses, stomach, intestines, or teeth
during an ascent? -ANSWER Stop your ascent and then descend a metre / few feet to
alleviate discomfort and allow trapped air some time to work its way out.
How does depth affect how long my air supply lasts? - ANSWER The deeper you are, the
denser 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 would I breathe when anxious under stress? - ANSWER Not faster - keep breathing
slowly
What are my 4 breathing rules as a scuba diver? - ANSWER 1. Always breathe - never
hold your breath
2. Breathe slowly and deeply
3. Never get winded or out of breath
4. When experiencing a problem - stop - through slow and deep breathing, you decrease
anxiety
What is buoyancy? - ANSWER A force upward on an object in the water. It counteracts,
or cancels, the pull of gravity.
What causes buoyancy? - ANSWER The upward force is caused by the water displaced
by the object, and is equal to the weight of displaced water
positive buoyancy - ANSWER The object weighs less than the water it displaces, so it
floats
neutral buoyancy - ANSWER The object weighs the same as the water it displaces,
neither sinking nor floating
Answers Latest Update
SCUBA - ANSWER Self contained underwater breathing apparatus
What is the pressure change for every 10m/33ft of depth change? - ANSWER 1 bar/1
ata/1 atmosphere
What is the relation 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 relation of pressure, to the volume and the density of air? ANSWER As
pressure 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 act upon as I descend? -
ANSWER Ears, sinuses, mask
What is a "squeeze"? - ANSWER The discomfort of tissue being pulled into the air space
by a pressure imbalance
What is "equalization"? - ANSWER Adding air to your air spaces as you descend
Equalise while descending how? - 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 equalise? - ANSWER Every meter/few feet, BEFORE you feel discomfort
What if you can't equalise? - ANSWER Stop your descent, signal problem and point to
your ear, ascend a bit, and try again
What could happen if I fail to, or am unable to, equalize gently and continue my descent?
- ANSWER Fluid may rupture the eardrum Bruising of the face may occur
Why does a congestion from a cold or allergy temporarily prevent me from diving? -
ANSWER Congestion may block normal air flow preventing equalization
Why must I never dive wearing earplugs? - ANSWER They introduce air spaces you
cannot 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
If I break the most fundamental of all scuba diving rules, what might happen? - ANSWER
Your lungs will over inflate and burst
What is a "reverse block"? - ANSWER Trapped expanding air in your body air spaces
during ascent
, What should I do if I have discomfort in my ears, sinuses, stomach, intestines, or teeth
during an ascent? -ANSWER Stop your ascent and then descend a metre / few feet to
alleviate discomfort and allow trapped air some time to work its way out.
How does depth affect how long my air supply lasts? - ANSWER The deeper you are, the
denser 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 would I breathe when anxious under stress? - ANSWER Not faster - keep breathing
slowly
What are my 4 breathing rules as a scuba diver? - ANSWER 1. Always breathe - never
hold your breath
2. Breathe slowly and deeply
3. Never get winded or out of breath
4. When experiencing a problem - stop - through slow and deep breathing, you decrease
anxiety
What is buoyancy? - ANSWER A force upward on an object in the water. It counteracts,
or cancels, the pull of gravity.
What causes buoyancy? - ANSWER The upward force is caused by the water displaced
by the object, and is equal to the weight of displaced water
positive buoyancy - ANSWER The object weighs less than the water it displaces, so it
floats
neutral buoyancy - ANSWER The object weighs the same as the water it displaces,
neither sinking nor floating
