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PADI Open Water Diver Certification Exam – 167 Questions and Answers
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PADI Open Water Diver CertificationExam – 167 Questions and Answers
SCUBA - -Self contained underwater breathing apparatus
-What is the pressure change for each 10m/33ft of depth change? - -1 bar/1
ata/1 atmosphere
-What is the relationship between my depth in water and the pressure? - -
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? - -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? - -Volume will be 1/ata#
Density will be ata#
-What 3 major body air spaces does increasing pressure affect as I descend?
- -Ears, sinuses, mask
-What is a "squeeze"? - -The discomfort caused by pressure imbalance
pulling tissue into the air space
-What is "equalization"? - -The addition of air to your air spaces as you
descend
-How do I equalize as I descend? - -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? - -Every meter/few feet, BEFORE you feel
discomfort
-What should I do if I can't equalize? - -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? -
-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? - -Congestion might block normal air flow, making equalization
difficult or impossible
-Why should I never dive with earplugs? - -They create air spaces that you
can't equalize
-What other body air spaces are affected by increasing pressure? How do I
equalize them? - -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? - -Breathe continuously
and never hold your breath
-What can happen if I don't follow the most important rule in scuba diving? -
-Your lungs will over expand and rupture
-What is a "reverse block"? - -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? - -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? - -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? - -Take
slow, deep breaths
-How do I breathe to reduce anxiety when under stress? - -Do NOT breathe
faster - keep breathing slowly
-What are my 4 breathing rules as a scuba diver? - -1. Breathe continuously
and never hold your breath
2. Breathe slowly and deeply
3. Don't allow yourself to get winded or out of breath
4. If faced with a problem, stop, and reduce anxiety by breathing slowly and
deeply
-What is buoyancy? - -An upward force acting on an object in the water,
canceling the pull of gravity
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