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SDI Exam with Complete Solutions
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SDI Exam with Complete Solutions
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SDI Exam with Complete SolutionsA dive knife or cutting tool can be used to - ANSWER-help free entangled divers or
signal others under water.
A regulator equipped with a conventional alternate-air-source second stage: -
ANSWER-Conventional alternate-air-source second stages offer the benefit of being
widely understood and used, and enable either diver to use either second stage.
A regulator system may include - ANSWER-1: A first stage and primary second stage.
2: An alternate air source second stage (or a connection to an alternate-air-source
inflator on the BC).
3: A submersible pressure gauge (SPG), which is usually part of an instrument console.
A repetitive dive is any dive: - ANSWER-any dive made within 24 hours of a previous
dive, or in which your computer indicates there is residual nitrogen left in your system
from a prior dive.
A rip current is a narrow flow of swiftly moving water that runs ____ to shore. -
ANSWER-perpendicular
A scuba cylinder that normally lasts one hour at the surface will last _______ minutes at
20 meters/66 feet. - ANSWER-20
Activities that may increase the risk of decompression sickness include: - ANSWER-
alcohol and drug use.
After your buddy checks to see that your air is turned all the way on: - ANSWER-take
several deep breaths from your regulator while watching your SPG for changes in
pressure.
Air passages such as your trachea (windpipe), which may contain air your body can't
use, are known as: - ANSWER-Dead air spaces.
Among the easiest ways to don a heavy weight belt, at the surface or under water, is to:
- ANSWER-Roll into it.
Any diver can signal to ______ the dive for any ________ - ANSWER-abort, reason
Any time you cannot inhale while scuba diving (such as when a regulator is out of your
mouth), you must be - ANSWER-Exhaling.
Basic post-dive equipment maintenance and care includes - ANSWER-1: Rinsing
thoroughly with fresh water.
2: Allowing to dry completely.
, 3: Storing in a cool, dry place, away from direct sunlight.
Because sound travels faster under water: - ANSWER-Sound's increases speed under
water makes it harder to determine the direction from which it is coming.
Before adding air to your BC under water, you must: - ANSWER-You need to continue
to breathe normally while adding air to your BC.
best way to prevent or reduce nitrogen narcosis? - ANSWER-Avoid dives below 20
meters/66 feet.
Cause of permanent ocean currents - ANSWER-The sun warming water near the
equator, coupled with the earth's rotation, is the primary cause of permanent ocean
currents.
Common exposure suit types include - ANSWER-1: Dive skins.
2: Wet suits.
3: Dry suits.
Common methods for clearing water from a regulator second stage include: -
ANSWER-exhaling into the second stage and depressing the purge button.
Contact lens wearers should not close their eyes when clearing a mask. - ANSWER-It is
important that contact lens wearers close their eyes when performing this skill, to help
prevent accidental lens loss.
Contributing factors to decompression sickness can include: - ANSWER-Rapid ascents,
'Pushing" or exceeding your computer's no-decompression limits, Heavy exertion and/or
dehydration.
Desirable mask features include - ANSWER-1: Soft, silicone skirt.
2: Low internal volume.
3: Snug, comfortable fit.
Divers should plan to ascend as soon as the first diver: - ANSWER-reaching your
maximum agreed-upon depth, so long as you do not exceed it.
During an independent emergency ascent, you should stop periodically and attempt to
inhale through your regulator because: - ANSWER-The decreasing pressure may allow
your regulator to function, even if it could not do so at depth.
First aid for suspected decompression sickness may include: - ANSWER-1: Activate the
Emergency Medical Service (EMS) system and contact the Divers Alert Network (DAN).
2: Monitor the patient's vital signs.
3. Administer pure oxygen.
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