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Naui Scuba Diving Questions and Answers
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Naui Scuba Diving Questions and Answers
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Naui Scuba Diving Questions and AnswersDiver Down" flags are displayed on the surface when divers are in the water in order to
provide a place for boats to tie up to. - ANSWER-false
A ____________ is used by divers to alert boaters that there are divers in the water
nearby - ANSWER-red & white dive flag
A ______________ is used to document data (max depth, dive time, equipment, weight
worn, etc.) from your dives, both training and otherwise. - ANSWER-dive log
A disadvantage to aluminum as a tank material is its tendency to rust quickly if water
gets inside. - ANSWER-False
A dive compass must have this feature to be useful for navigation. - ANSWER-a
reference (lubber) line
A diver may experience a "squeeze" when descending or a "block" when ascending due
to unequal pressure inside and outside the eardrum. - ANSWER-true
A diver should not fly for at least _______ hours after repetitive dives to ensure that they
have offgassed all additional nitrogen absorbed during their dives. - ANSWER-24
A diver's buoyancy is affected by the diver's body density (weight/volume ratio), the
equipment worn (BC, tank, wetsuit), and the breathing pattern. - ANSWER-true
A hand slashing across the throat is the underwater signal for: - ANSWER-I'm out of air!
A line floating behind an anchored boat provides a safe place to grab if you surface
behind the boat. That line is called a ___________ line. - ANSWER-trail
A lung over-pressurization injury can result in an air embolism or a collapsed lung,
which is also called _____________. - ANSWER-a pneumothorax
A repetitive dive is any dive made within ______________ hours of a previous dive. -
ANSWER-24
A stuck power-inflator mechanism can lead to an over-inflated BC, which can be
dangerous because...? - ANSWER-it can cause an uncontrolled ascent
A thin zone in freshwater lakes where the warm surface water changes rapidly to a
colder, deeper layer is called _____. - ANSWER-a thermocline
A type of alternate air source considered to be a "contingency scuba" air source is: -
ANSWER-a pony bottle
, Air is a mixture of gases in the following proportions: - ANSWER-78% N2, 21% O2, and
1% miscellaneous gases
Alcohol and other recreational drugs should be avoided prior to diving as they can
impair judgment. Even over-the-counter medications can lead to problems while scuba
diving. - ANSWER-True
All of the following are types of currents except __________________. - ANSWER-
transitional
Any diving environment that does not allow direct vertical access to the surface is called
an overhead environment and is not advised for recreational scuba divers. - ANSWER-
true
As a scuba diver, you must be willing to accept the risks of the sport and to take
responsibility for your own actions. - ANSWER-True
As part of planning for any dive, you and your partner should agree on depth, time, and
air supply (at what psi you'll end your dive). - ANSWER-true
As we dive underwater, water also exerts pressure on us that is proportional to our
depth. However, the pressure differs between freshwater (FW) and salt water (SW)
because of all the salts (minerals) dissolved in salt water. Which pair of numbers is
correct for the depth equaling one (1) atmosphere of water pressure? - ANSWER-34
FFW & 33 FSW
At the end of every dive should make a Precautionary Decompression Stop (aka Safety
Stop) at a depth of _____ feet for ______ minutes. - ANSWER-15, 3
Because of water's increased density (compared to air) sound travels faster
underwater...in fact, too fast for your ears and brain to determine the direction of the
sound. This is because sound waves underwater travel about 5 times faster than in air. -
ANSWER-false
Because you wear the basic personal equipment directly on your body (mask, fins, etc.)
the most important considerations are comfort and fit - ANSWER-True
Because your skin is protected when wearing dive gloves it's OK to touch all marine life.
- ANSWER-False
Blood in your dive mask may be the result of: - ANSWER-a sinus squeeze
Both air and water are easily compressed - ANSWER-false
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