COMPLETE QUESTIONS| LATEST UPDATE
2026 | VERIFIED ANSWERS | 100%
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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 buoyancy 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