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PADI Open Water Exam Study Guide Exam/134 Questions and Answers
PADI Open Water Exam Study Guide Exam/134 Questions and Answers
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PADI Open Water Exam Study GuideExam/134 Questions and Answers
When is an object positively buoyant? - -When it displaces a volume of water
weighing more than its own weight.
-When is an object negatively buoyant? - -When it displaces a volume of
water weighing less than its own weight.
-When is an object neutrally buoyant? - -When it displaces a volume of
water weighing the same as its own weight.
-Why two pieces of equipment do you use to control your buoyancy? - -BCD,
Lead weight
-What does buoyancy help with when you are underwater? - -Controlling
where you are
-What does buoyancy help with when you are at the surface? - -Floatation,
conserving energy
-How does the buoyancy of an object differ in fresh/salt water? - -More
buoyant in salt than fresh
-When you exhale what happens? - -Lung volume decreases so you have
less buoyancy.
-When you inhale what happens? - -Lung volume increases so you have
more buoyancy.
-Why don't you feel air pressure? - -Your body is primarily liquid, which is
incompressible and distribute pressure equally throughout your whole body.
-Where are some air spaces located in the body? - -Ears, sinuses, lungs
-Do you always feel the pressure in body air spaces? - -Only if the pressure
is different inside and outside the air spaces.
-1 bar is what depth? - -0m/0ft
-2 bar is what depth? - -33ft/10m
-3 bar is what depth? - -66ft/20m
, -4 bar is what depth? - -99ft/30m
-How is air volume affected when depth is increased? - -It decreases
-How is air density affected when depth is increased? - -It increases
-What happens if you take an air volume underwater with you in a flexible
container or inverted jar? - -As pressure increases the volume decreases,
same air but smaller space.
-How do you maintain air volume as you descend? - -Equalize
-What is a "squeeze"? - -As volume decreases, pressure pushes body
tissues inwards toward air space, causing discomfort. Pressure outside air
space is more than pressure inside air space.
-Where can you get a squeeze? - -Ears, sinuses, mask, lungs, teeth
-How do you equalise air spaces in ears? - -Blow and squeeze nose, wiggle
jaw, swallowing
-How often should you equalise? - -Every metre before discomfort
-What do you do if you feel discomfort? - -Ascend until discomfort eases,
equalise, continue descent slowly
-Why can't you scuba while sick? - -Congestion can plug air passages so you
can't equalize
-What is mask equalisation? - -exhale into mask by nose
-What does your nose need to be in the mask? - -To equalize
-First rule of diving - -Always breathe continuously
-What happens if you hold your breath during ascent? - -Lung over
expansion, forces air into bloodstream and chest cavity, leading to paralysis
or death.
-What is a reverse block? - -When air cannot escape from a air space during
ascent
-How do you react to reverse block? - -Slow/stop ascent and give air time to
work its way out
-As you go deeper you use your air ___? - -faster
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