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If an object is neutrally buoyant in fresh water, the same object placed into salt water
would... -ANSWERS-Float
I blow up a balloon, tie it off, and take it to the bottom of the swimming pool. What will
happen to the balloon and the air inside it? -ANSWERS-The balloon will get smaller and
the air inside the balloon will be more dense
I turn a glass upside down, trap the air in it by putting it in water, and then I take the
glass down to 10 m/33 ft. The air space would... -ANSWERS-Become half the size it
was at the surface
If I am not able to equalize my body air spaces, it may be because I have... -
ANSWERS-A cold, allergy or another medical problem
If my ears or sinuses hurt while I am descending, it usually means... -ANSWERS-I am
feeling a squeeze and need to equalize
The best place for me to position an alternate air source is... -ANSWERS-In the triangle
area formed by my chin and the lower corners of my rib cage
Lung overexpansion injuries can be caused by... -ANSWERS-Holding my breath while
scuba diving
If I were separated from my buddy, the general procedure is to... -ANSWERS-Search
for a minute and then go up to reunite with my buddy at the surface
, I am most likely to become confused about which way is up or down... -ANSWERS-In
midwater
I feel a mild current at the start of my dive. How should I begin this dive? -ANSWERS-
Dive against or into the current
What the bottom is made of can cause big changes in... -ANSWERS-Visibility
Most injuries caused by aquatic animals happen because the animals are... -
ANSWERS-Trying to defend themselves
A diver at the surface is moving quickly and jerkily, has the mask off the face, the
regulator/snorkel is out of the mouth, and the diver does not respond to directions. The
diver is... -ANSWERS-Showing signs of distress (trouble)
I am close to my buddy and realize I am out of air. The best response is to... -
ANSWERS-Switch to my buddy's alternate air source
If my regulator begins to free flow while underwater, I should... -ANSWERS-Hold the
regulator without sealing my mouth around the mouthpiece and "sip" the air I need as I
ascend
If my cylinder of air lasts 60 minutes while I am at the surface breathing normally,
assuming all else is the same, how long will it last at 20 m/66 ft breathing normally? -
ANSWERS-20 minutes
How often should I take my scuba cylinder to be visually inspected by my dive center? -
ANSWERS-Once a year
The difference between DIN values and yoke valves is that DIN valves... -ANSWERS-
Have threaded openings to screw the regulator into