Open Water Diver - Knowledge Review

Open Water Diver - Mini Quiz
This is a sample of our Open Water Diver - Knowledge Review. The full version include 100 questions divided in 5 modules. You can have FREE access to the full version simply by registering.

1. An object is negatively buoyant when:

It displaces a volume of water weighing less than its own weight.
It displaces a volume of water weighing more than its own weight.
It displaces a volume of water weighing equal than its own weight.
Colder than the water.

2. What two pieces of equipment do you use to control your buoyancy?

BCD and Mask.
Mask and Snorkel.
BCD and Lead weight.
Fins and Mask.

3. Buoyancy control is one of the most important skills you can master because it allows you to control
where you are in the water?

True False

4. When you exhale, your lung volume decreases. This mean you have ________ buoyancy.

less more

5. You usually feel pressure only in body air spaces because:

Your body is mostly made of incompressible liquid. but air is compressible and changes volume
with pressure changes.
Water is denser than air, which resists pressure better.
Neoprene protect the rest of my body against the pressure.
Your body is warmer then water.

6. Pressure changes in water for a given ascent or descent are much more substantial than the same
distance ascent or descent in air because the water weighs more?

True False

7. The three major air spaces affected by pressure when you descend are:

Sinuses, Lungs and Stomach.
Lungs, Mask and Ears.
Mask, Sinuses and Ears.
Stomach, Mask and Lungs.

8. Equalization is adding air to an air space as you descend so the pressure in an air space equals the
surrounding water pressure?

True False

9. A squeeze is?

A pressure imbalance in which pressure inside an air space exceeds pressure outside an air space, resulting
in pain and discomfort.
A piece of equipment.
A pressure imbalance in which pressure outside an air space exceeds pressure inside an air space, resulting
in pain and discomfort.
A new type of fish living in the depths of Lake Ontario and discovered last year by your scuba instructor.

10. You want to equalize your ears?

When you feel discomfort.
Every few metre/few feet before you feel discomfort.
Only if they hurt enough to bother you.
Once you reach the bottom of your dive.