Correct Answers 2025
If an object is neutrally buoyant in fresh water, the same object placed into salt water would... - correct
answer -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? - correct answer -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... - correct answer -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... - correct answer -A cold,
allergy or another medical problem
If my ears or sinuses hurt while I am descending, it usually means... - correct answer -I am feeling a
squeeze and need to equalize
The best place for me to position an alternate air source is... - correct answer -In the triangle area
formed by my chin and the lower corners of my rib cage
Lung overexpansion injuries can be caused by... - correct answer -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? - correct answer -20 minutes
How often should I take my scuba cylinder to be visually inspected by my dive center? - correct answer -
Once a year
, The difference between DIN values and yoke valves is that DIN valves... - correct answer -Have threaded
openings to screw the regulator into
Which of the following is not part of proper care for my scuba cylinder? - correct answer -Keep some air
in it
Refer to the regulator picture on the right. Each regulator part has a number next to it. Please choose
the correct numeric order from the choices below - correct answer -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 - correct answer
-Larger and/or nearer
_____ travels faster in water than it does in air. This is why you cannot easily tell where it comes from -
correct answer -Sound
Unless there are laws that say differently, I should stay within _____ of my dive flag - correct answer -15
m/50 ft
If I work too hard and find it difficult to breathe underwater, I should... - correct answer -Stop all activity
and rest, holding onto something for support if possible
As I descend, my wet suit will... - correct answer -Compress from water pressure, and I will lose
buoyancy and warmth
I know I am properly weighted for diving if I... - correct answer -Float at eye level while holding a normal
breath of air and with an empty BCD
Choose the best answer for the signal shown from the choices provided - correct answer -Stop, hold it,
stay there