DOS II FINAL EXAM QUESTIONS WITH 100 %
CORRECT ANSWERS | VERIFIED
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
To move efficiently as a diver, I should move - ANSWER slowly and steadily
Trim is important for streamlining because - ANSWER poor trim raises or lowers
my feet, causing drag
CORRECT ANSWERS | VERIFIED
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
To move efficiently as a diver, I should move - ANSWER slowly and steadily
Trim is important for streamlining because - ANSWER poor trim raises or lowers
my feet, causing drag
