PADI Open Water Diver Certification exam 2023 with 100% correct answers
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Course
PADI Open Water Diver Certification
Institution
PADI Open Water Diver Certification
SCUBA correct answersSelf contained underwater breathing apparatus
What is the pressure change for each 10m/33ft of depth change? correct answers1 bar/1 ata/1 atmosphere
What is the relationship between my depth in water and the pressure? correct answersThe deeper you go in water, the more th...
PADI Open Water Diver Certification
SCUBA correct answersSelf contained underwater breathing apparatus
What is the pressure change for each 10m/33ft of depth change? correct answers1 bar/1 ata/1 atmosphere
What is the relationship between my depth in water and the pressure? correct answersThe 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? correct answersAs 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? correct answersVolume will be 1/ata#
Density will be ata#
What 3 major body air spaces does increasing pressure affect as I descend? correct answersEars, sinuses,
mask
What is a "squeeze"? correct answersThe discomfort caused by pressure imbalance pulling tissue into the air space
What is "equalization"? correct answersThe addition of air to your air spaces as you descend
How do I equalize as I descend? correct answersFor 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? correct answersEvery meter/few feet, BEFORE you feel discomfort
What should I do if I can't equalize? correct answersStop 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? correct answersFluid can rupture the eardrum
Bruising around the face can occur
Why does a congestion from a cold or allergy temporarily keep me from diving? correct answersCongestion might block normal air flow, making equalization difficult or impossible
Why should I never dive with earplugs? correct answersThey create air spaces that you can't equalize
What other body air spaces are affected by increasing pressure? How do I equalize them? correct answersIn 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? correct answersBreathe continuously and never hold your breath
What can happen if I don't follow the most important rule in scuba diving? correct answersYour lungs will over expand and rupture
What is a "reverse block"? correct answersWhen 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? correct answersStop 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? correct answersThe 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? correct answersTake slow, deep breaths
How do I breathe to reduce anxiety when under stress? correct answersDo NOT breathe faster - keep breathing slowly
What are my 4 breathing rules as a scuba diver? correct answers1. 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? correct answersAn upward force acting on an object in the water, canceling the pull of gravity
What causes buoyancy? correct answersThe upwards force is caused by the water displaced by the object, and is equal to the weight of displaced water
positive buoyancy correct answersThe object weighs less than the water it displaces, so it floats
neutral buoyancy correct answersThe object weighs the same as the water it displaces, neither sinking nor floating
negative buoyancy correct answersThe object weighs more than the water it displaces, so it sinks
Why does salt water cause more buoyancy than fresh water? correct answersIt has dissolved minerals in it, so a given volume weighs more than fresh water
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