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
Overexertion results from - ANSWER-a prolonged increased effort
Buddy Predive Safety Check - ANSWER-Begin With Review And Friend
BCD, Weight, Releases, Air, Final Check
If my buddy and I get separated, the general procedure is to - ANSWER-look for each
other for no more than a minute, then reunite on the surface
My buddy and I are planning a boat dive with the same type cylinders filled to 200
bar/3000 psi. Due to conditions, we are planning very conservatively. We agree on 60
bar/800 psi for our reserve. We agree that we also want an additional 30 bar/500 psi for
our ascent and safety stop. This means we should begin our ascent when either of our
SPGs reads - ANSWER-90 bar/1300 psi
My buddy and I have just started our descent. I begin equalizing - ANSWER-
immediately, as soon as my head goes underwater
During my descent, to control my buoyancy I add air to my BCD - ANSWER-in small
amounts, frequently
To start my ascent, I should - ANSWER-swim up gently
To control my buoyancy while ascending, I should - ANSWER-vent my BCD with in small
amounts frequently
A safety stop is a stop between ______ and ______ for three to five minutes - ANSWER-
6 m/20 ft, 3 m/10 ft
When I reach the surface, the first thing I do is _______ - ANSWER-inflate my BCD
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
Overexertion results from - ANSWER-a prolonged increased effort
Buddy Predive Safety Check - ANSWER-Begin With Review And Friend
BCD, Weight, Releases, Air, Final Check
If my buddy and I get separated, the general procedure is to - ANSWER-look for each
other for no more than a minute, then reunite on the surface
My buddy and I are planning a boat dive with the same type cylinders filled to 200
bar/3000 psi. Due to conditions, we are planning very conservatively. We agree on 60
bar/800 psi for our reserve. We agree that we also want an additional 30 bar/500 psi for
our ascent and safety stop. This means we should begin our ascent when either of our
SPGs reads - ANSWER-90 bar/1300 psi
My buddy and I have just started our descent. I begin equalizing - ANSWER-
immediately, as soon as my head goes underwater
During my descent, to control my buoyancy I add air to my BCD - ANSWER-in small
amounts, frequently
To start my ascent, I should - ANSWER-swim up gently
To control my buoyancy while ascending, I should - ANSWER-vent my BCD with in small
amounts frequently
A safety stop is a stop between ______ and ______ for three to five minutes - ANSWER-
6 m/20 ft, 3 m/10 ft
When I reach the surface, the first thing I do is _______ - ANSWER-inflate my BCD
