PADI Open Water Diver Final Exam
As a newly certified PADI Open Water Diver, I will be trained to dive with buddy as deep
as - ANSWER...-18 metres/60 feet
As you descend in water, the pressure - ANSWER...-increases
A depth change of 10 metres/33 feet causes a pressure change of - ANSWER...-1
bar/ata (atmosphere)
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be -
ANSWER...-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 - ANSWER...-burst
A squeeze is caused by - ANSWER...-a pressure imbalance between the surrounding
pressure and an air space
Equalization is the process of - ANSWER...-adding air to an air space
The most important rule in scuba diving is to - ANSWER...-breathe continuously and
never hold your breath
During ascent I feel discomfort in my ears. I should - ANSWER...-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 - ANSWER...-faster than
The most efficient way to breathe dense air underwater is to breathe - ANSWER...-
deeply and slowly
Buoyancy - ANSWER...-a force that pushes an object in water upward
Salt water causes more buoyancy than fresh water because it is _____ dense and
weighs _____ - ANSWER...-more
When I descend, my buoyancy tends to ________. When I ascend, it tends to _______
- ANSWER...-decrease, increase
, The three most important considerations in choosing scuba equipment are suitability, fit,
and - ANSWER...-comfort
The two basic fin styles are __________ fins - ANSWER...-adjustable and full-foot
My primary considerations when choosing fins are fit and - ANSWER...-blade size
BCD (buoyancy control device) - ANSWER...-holds your kit together and allows you to
adjust buoyancy throughout the dive
Regulator - ANSWER...-delivers breathing air at the surrounding pressure when you
inhale and directs exhaled air into the air
Cylinder - ANSWER...-holds the high-pressure breathing air supplied by your regulator
during the dive
Weight System - ANSWER...-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 - ANSWER...-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 - ANSWER...-inflates the BCD with air from my scuba cylinder
Burst disk - ANSWER...-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 _________ -
ANSWER...-every 2-5 years, annually
The most important feature in my weight system is its - ANSWER...-quick release
Trim means having the right _____ of weight - ANSWER...-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 - ANSWER...-true
An object that is neutrally bouyant in fresh water will _____ in salt water - ANSWER...-
float
Underwater objects appear - ANSWER...-larger and/or closer
Sound travels about 4 times _____ in water than in air, making it difficult to determine its
source - ANSWER...-faster
As a newly certified PADI Open Water Diver, I will be trained to dive with buddy as deep
as - ANSWER...-18 metres/60 feet
As you descend in water, the pressure - ANSWER...-increases
A depth change of 10 metres/33 feet causes a pressure change of - ANSWER...-1
bar/ata (atmosphere)
if you take 6 liters of air from the surface to 20 metres/66 feet, the volume will be -
ANSWER...-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 - ANSWER...-burst
A squeeze is caused by - ANSWER...-a pressure imbalance between the surrounding
pressure and an air space
Equalization is the process of - ANSWER...-adding air to an air space
The most important rule in scuba diving is to - ANSWER...-breathe continuously and
never hold your breath
During ascent I feel discomfort in my ears. I should - ANSWER...-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 - ANSWER...-faster than
The most efficient way to breathe dense air underwater is to breathe - ANSWER...-
deeply and slowly
Buoyancy - ANSWER...-a force that pushes an object in water upward
Salt water causes more buoyancy than fresh water because it is _____ dense and
weighs _____ - ANSWER...-more
When I descend, my buoyancy tends to ________. When I ascend, it tends to _______
- ANSWER...-decrease, increase
, The three most important considerations in choosing scuba equipment are suitability, fit,
and - ANSWER...-comfort
The two basic fin styles are __________ fins - ANSWER...-adjustable and full-foot
My primary considerations when choosing fins are fit and - ANSWER...-blade size
BCD (buoyancy control device) - ANSWER...-holds your kit together and allows you to
adjust buoyancy throughout the dive
Regulator - ANSWER...-delivers breathing air at the surrounding pressure when you
inhale and directs exhaled air into the air
Cylinder - ANSWER...-holds the high-pressure breathing air supplied by your regulator
during the dive
Weight System - ANSWER...-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 - ANSWER...-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 - ANSWER...-inflates the BCD with air from my scuba cylinder
Burst disk - ANSWER...-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 _________ -
ANSWER...-every 2-5 years, annually
The most important feature in my weight system is its - ANSWER...-quick release
Trim means having the right _____ of weight - ANSWER...-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 - ANSWER...-true
An object that is neutrally bouyant in fresh water will _____ in salt water - ANSWER...-
float
Underwater objects appear - ANSWER...-larger and/or closer
Sound travels about 4 times _____ in water than in air, making it difficult to determine its
source - ANSWER...-faster
