Knowledge Review One

1. A depth change of 10 metres/33 feet causes a pressure change of

2. As I descend, I need to equalize air spaces. Which of the following
are accepted ways of equalizing my ears?

3. During a descent, I try to equalize but discover I’m having trouble
doing so. Which of the following is correct?

4. I should equalize

5. I should not dive with a cold, nor use medications to dive
with a cold.

6. What is the number one most important rule in scuba diving?

7. Failure to follow the most important rule in scuba diving can cause
serious lung over expansion (lung rupture) injuries, which in turn
can cause paralysis and death.

8. If I feel discomfort in a body air space while ascending, the
correct action is to:

9. My buddy and I are planning a dive to 18 metres/60 feet. We
would expect our air supply to last ________ at 10 metres/33 feet
all else being the same.

10. During a dive, I swim hard to keep up with a fish that interests
me, but shortly begin to feel like I can’t get enough air. The
correct action would be to:

11. An object that is neutrally buoyant in fresh water will _______ in
salt water.

12. The three overall benefits of the buddy system are practicality,
safety and fun.

13. The primary considerations when choosing any piece of scuba
gear are? Choose all that apply.

14. I’m planning to dive the following week and am checking my
gear. I put my kit together and notice that my regulator seems to
breathe harder than I remember. The appropriate action would be
to:

15. There is no way to use a DIN regulator on a yoke cylinder valve.

16. It is important to master buoyancy control because it allows me to
control whether I descend, float or am neutrally buoyant. I may adjust
my buoyancy frequently while diving.