PADI Open Water Diver Final Exam-
Graded A
As a newly certified PADI Open Water Diver, I will be trained to dive with buddy as deep
as - 18 metres/60 feet
As you descend in water, the pressure - increases
A depth change of 10 metres/33 feet causes a pressure change of - 1 bar/ata
(atmosphere)
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be - 2
litres (the density of the air would be three times the density at the surface)
A balloon fully inflated and sealed at 10 metres/33 feet, would probably ______ during
ascent to the surface - burst
A squeeze is caused by - a pressure imbalance between the surrounding pressure and
an air space
Equalization is the process of - adding air to an air space
The most important rule in scuba diving is to - breathe continuously and never hold your
breath
During ascent I feel discomfort in my ears. I should - stop, descend slightly, and allow
trapped air to work its way out
My buddy and I descend to 12 metres/40 feet. I would expect to use my air _____ at 6
metres/20 feet - faster than
The most efficient way to breathe dense air underwater is to breathe - deeply and slowly
Buoyancy - a force that pushes an object in water upward
Salt water causes more buoyancy than fresh water because it is _____ dense and
weighs _____ - more
When I descend, my buoyancy tends to ________. When I ascend, it tends to _______
- decrease, increase
, The three most important considerations in choosing scuba equipment are suitability, fit,
and - comfort
The two basic fin styles are __________ fins - adjustable and full-foot
My primary considerations when choosing fins are fit and - blade size
BCD (buoyancy control device) - holds your kit together and allows you to adjust
buoyancy throughout the dive
Regulator - delivers breathing air at the surrounding pressure when you inhale and
directs exhaled air into the air
Cylinder - holds the high-pressure breathing air supplied by your regulator during the
dive
Weight System - holds lead weight to counteract the positive buoyancy of your body
and some of your equipment, with a mechanism for dropping some or all the weight in
an emergency
The five components that make up a BCD include - an inflatable bladder, a cylinder
band and harness/jacket, an LPI (low-pressure inflator) mechanism, an
overpressure/quick exhaust valves, and a weight system
LPI mechanism - inflates the BCD with air from my scuba cylinder
Burst disk - a safety device that relieves accidental overpressure by releasing air before
reaching the pressure at which the cylinder would fail
scuba cylinders require pressure testing _______ and visual inspection _________ -
every 2-5 years, annually
The most important feature in my weight system is its - quick release
Trim means having the right _____ of weight - distribution
Failure to follow the most important rule in scuba diving can cause serious lung
overexpansion injuries, which in turn can cause paralysis and death - true
An object that is neutrally bouyant in fresh water will _____ in salt water - float
Underwater objects appear - larger and/or closer
Sound travels about 4 times _____ in water than in air, making it difficult to determine its
source - faster
Graded A
As a newly certified PADI Open Water Diver, I will be trained to dive with buddy as deep
as - 18 metres/60 feet
As you descend in water, the pressure - increases
A depth change of 10 metres/33 feet causes a pressure change of - 1 bar/ata
(atmosphere)
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be - 2
litres (the density of the air would be three times the density at the surface)
A balloon fully inflated and sealed at 10 metres/33 feet, would probably ______ during
ascent to the surface - burst
A squeeze is caused by - a pressure imbalance between the surrounding pressure and
an air space
Equalization is the process of - adding air to an air space
The most important rule in scuba diving is to - breathe continuously and never hold your
breath
During ascent I feel discomfort in my ears. I should - stop, descend slightly, and allow
trapped air to work its way out
My buddy and I descend to 12 metres/40 feet. I would expect to use my air _____ at 6
metres/20 feet - faster than
The most efficient way to breathe dense air underwater is to breathe - deeply and slowly
Buoyancy - a force that pushes an object in water upward
Salt water causes more buoyancy than fresh water because it is _____ dense and
weighs _____ - more
When I descend, my buoyancy tends to ________. When I ascend, it tends to _______
- decrease, increase
, The three most important considerations in choosing scuba equipment are suitability, fit,
and - comfort
The two basic fin styles are __________ fins - adjustable and full-foot
My primary considerations when choosing fins are fit and - blade size
BCD (buoyancy control device) - holds your kit together and allows you to adjust
buoyancy throughout the dive
Regulator - delivers breathing air at the surrounding pressure when you inhale and
directs exhaled air into the air
Cylinder - holds the high-pressure breathing air supplied by your regulator during the
dive
Weight System - holds lead weight to counteract the positive buoyancy of your body
and some of your equipment, with a mechanism for dropping some or all the weight in
an emergency
The five components that make up a BCD include - an inflatable bladder, a cylinder
band and harness/jacket, an LPI (low-pressure inflator) mechanism, an
overpressure/quick exhaust valves, and a weight system
LPI mechanism - inflates the BCD with air from my scuba cylinder
Burst disk - a safety device that relieves accidental overpressure by releasing air before
reaching the pressure at which the cylinder would fail
scuba cylinders require pressure testing _______ and visual inspection _________ -
every 2-5 years, annually
The most important feature in my weight system is its - quick release
Trim means having the right _____ of weight - distribution
Failure to follow the most important rule in scuba diving can cause serious lung
overexpansion injuries, which in turn can cause paralysis and death - true
An object that is neutrally bouyant in fresh water will _____ in salt water - float
Underwater objects appear - larger and/or closer
Sound travels about 4 times _____ in water than in air, making it difficult to determine its
source - faster
