Open Water 1

Question 1

As an open water diver, you can dive how deep with a partner or instructor?

Answer 1

18m / 60 ft

Question 2

The four Es of Diving

Answer 2

Education, Experience, Equipment, Environment

Question 3

At what rate does pressure change underwater?

Answer 3

One bar for every 10m/33ft

Question 4

How often should you equalize when descending?

Answer 4

Every few feet. Warn others if you can not do it.

Question 5

How do you equalize when ascending?

Answer 5

You don’t. Breathe normally and the extra air should leave

Question 6

What is the most important rule of diving?

Answer 6

Continuously breathe. Never hold your breath.

Question 7

What is a reverse block?

Answer 7

When air does not equalize normally during ascent. If this happens, carefully descend and wait for it to equalize.

Question 8

How should you try to breathe?

Answer 8

Slowly, deeply, constantly. Do not let yourself feel exerted.

Question 9

What is positive vs negative buoyancy?

Answer 9

Is it lighter than the surrounding environment and will therefore float? Then it is positive buoyancy.

If heavier and would sink, that is negative buoyancy.

Neutral is balanced in the middle.

Question 10

How does buoyancy differ in fresh vs salt water?

Answer 10

Salt in saltwater makes the water denser and therefore you more buoyant.

For reference, think of most buoyant sea of the Dead Sea

Question 11

BCD

Answer 11

Buoyancy Control Device

Question 12

How much weight do you need in your weight system?

Answer 12

Just enough to descend, but not so much that you sink quickly.

Question 13

What are the three most important factors in picking equipment?

Answer 13

Suitability, Fit, Comfort

Right for the circumstances, adjusted for you (dive shop can help), enjoyable to wear (up to you)

Question 14

Why do you need a mask?

Answer 14

Eyes must be in air to focus, and nose must be enclosed to equalize mask

Question 15

Signs of a proper mask?

Answer 15

Sits close to face with as wide a field of view as possible

Question 16

Mask strap should be placed

Answer 16

Above ears, over the crown of the head

Question 17

Why do divers use snorkels?

Answer 17

They are good for conserving air supply when near the surface, while still easier than taking head above water

Question 18

Four parts of the scuba kit/scuba unit

Answer 18

BCD
Regulator
Cylinder
Weight System

Question 19

The LPI

Answer 19

Low Pressure Inflator, fills BCD with air from the cylinder

Question 20

Regulator components

Answer 20

• First stage (hub) - Provides air to all components
• Second stage - provides air at surrounding pressure to breathe
• Alternate air source (“octopus”) - Backup air, can share with others if needed. -Often brightly colored to find easily
• SPG (submersible pressure gauge) - Shows remaining air in tank
• Low pressure inflator hose

Question 21

Where does the alternate air source go?

Answer 21

In the triangle between hips and chin

Question 22

What is a burst disk?

Answer 22

Part of the valve on a cylinder that releases excess pressure

Question 23

What is Trim?

Answer 23

Balance and in water. Natural/horizontal position is ideal.

Question 24

Most important feature of a weight system?

Answer 24

The ability to quick release in case of a problem

Question 25

Watch videos, practice hand signals