PADI OPEN WATER DIVER FINAL EXAM QUESTIONS
WITH COMPLETE SOLUTION
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
WITH COMPLETE SOLUTION
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
