Graded A+
If an object is neutrally buoyant in fresh water, the same object placed into salt water
would...
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?
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...
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...
A cold, allergy or another medical problem
If my ears or sinuses hurt while I am descending, it usually means...
I am feeling a squeeze and need to equalize
The best place for me to position an alternate air source is...
In the triangle area formed by my chin and the lower corners of my rib cage
Lung overexpansion injuries can be caused by...
Holding my breath while scuba diving
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?
20 minutes
How often should a scuba cylinder to be visually inspected
Once a year
The difference between DIN values and yoke valves is that DIN valves...
Have threaded openings to screw the regulator into
Part of proper care for my scuba cylinder?
Keep some air in it
Name the parts of a regulator
1. Regulator first stage, 2. regulator second stage, 3. alternate air source second stage,
4. low pressure inflator hose for the BCD, 5. instrument console/gauges/computer
When I look at things underwater they often seem _____ than they look on the surface
Larger and/or nearer
_____ travels faster in water than it does in air. This is why you cannot easily tell where
it comes from
Sound
Unless there are laws that say differently, I should stay within _____ of my dive flag
15 m/50 ft
If I work too hard and find it difficult to breathe underwater, I should...
Stop all activity and rest, holding onto something for support if possible
As I descend, my wet suit will...
Compress from water pressure, and I will lose buoyancy and warmth
, I know I am properly weighted for diving if I...
Float at eye level while holding a normal breath of air and with an empty BCD
Hand signal for Stop, hold it, stay
Stop, hold it, stay there
Hand signal for Stop, hold it, stay.
. Hand signal for Something is wrong
.
Hand signal for Okay? Okay
.
Hand signal for Low on air
Hand signal for Low on air