PADI Open Water Diver Certification.

PADI Open Water Diver Certification
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SCUBA - correct answer✔ ✔
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Self contained underwater breathing apparatus
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What is the pressure change for each 10m/33ft of depth ch
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ange? - correct answer✔ ✔ 1 bar/1 ata/1 atmosphere
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What is the relationship between my depth in water and th
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e pressure? - correct answer✔ ✔
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The deeper you go in water, the more the pressure increa
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ses
Pressure is expressed as the weight of air
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What is the relationship between pressure, and the volume
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and the density of air? - correct answer✔ ✔
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As pressure increases, the gas volume decreases and the
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gas density increases
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If I take a volume of air from one depth to another depth,
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how much will the volume and density change? -
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correct answer✔ ✔ Volume will be 1/ata#
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,Density will be ata# FG FG FG




What 3 major body air spaces does increasing pressure affe
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ct as I descend? - correct answer✔ ✔
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Ears, sinuses, mask
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What is a "squeeze"? - correct answer✔ ✔
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The discomfort caused by pressure imbalance pulling tissu
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e into the air space
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What is "equalization"? - correct answer✔ ✔
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The addition of air to your air spaces as you descend
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How do I equalize as I descend? - correct answer✔ ✔
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For ears and sinuses, pinch your nose and blow gently, o
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r wiggle your jaw and swallow
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For mask, blow into it with nose
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How often should I equalize? - correct answer✔ ✔
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Every meter/few feet, BEFORE you feel discomfort
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,What should I do if I can't equalize? - correct answer✔
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✔
Stop your descent, signal problem and point to your ear,
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ascend a bit, and try again
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What can happen if I don't or can't equalize gently and ke
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ep descending? - correct answer✔ ✔
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Fluid can rupture the eardrum
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Bruising around the face can occur
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Why does a congestion from a cold or allergy temporarily
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keep me from diving? - correct answer✔ ✔
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Congestion might block normal air flow, making equalizat
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ion difficult or impossible
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Why should I never dive with earplugs? - correct answer✔
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✔ They create air spaces that you can't equalize
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What other body air spaces are affected by increasing press
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ure? How do I equalize them? - correct answer✔ ✔
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In filled teeth - go to a dentist
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In a dry suit - learn from an instructor
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, Lungs - breathe normally and continuously
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What is the most important rule in scuba diving? -
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correct answer✔ ✔
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Breathe continuously and never hold your breath
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What can happen if I don't follow the most important rule
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in scuba diving? - correct answer✔ ✔
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Your lungs will over expand and rupture
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What is a "reverse block"? - correct answer✔ ✔
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When expanding air becomes trapped in your body air sp
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aces as you ascend
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What should I do if I feel discomfort in my ears, sinuses,
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stomach, intestines, or teeth while ascending? -
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correct answer✔ ✔
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Stop your ascent and descend a meter/few feet to reduce
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Gdiscomfort and give trapped air time to work its way out
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How does depth affect how long my air supply lasts? -
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correct answer✔ ✔
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