Module One Quiz

1. Something underwater that does not float and does not sink is

2. If an object is neutrally buoyant in salt water, what will happen to the object
if I put it into fresh water?

3. A diver is 30 metres/99 feet underwater. The water pressure at this depth
would be ______ times more than the pressure at the surface.

4. If I hold a glass full of air upside down, and I take it to the bottom of the
swimming pool without tipping it, the density (thickness) of the air inside the
glass will be ______ at the surface.

5. What should I do if I can’t equalize (clear) my ears or sinuses while I am
descending (going down)?

6. What should I do to prevent mask squeeze (a sucking or pulling feeling on my
face and eyes)?

7. I put air into a balloon underwater at 10 metres/ 33 feet and
then I take it to the surface. The balloon will

8. What can happen to me if I hold my breath while ascending
on a scuba dive?

9. What is the most important feature of a scuba regulator?

10. Diving is easier, safer and more fun when I