PADI Section 1

What breathing rules should I follow as a diver?

-Breathe continuously & never, ever hold my breath -Do not allow myself to get winder/out-of-breath -Breathe slowly & deeply -If faced with a problem, stop, then maintain or restore slow, deep breathing

1-2 As I descend, increasing pressure affects my:

-mask -ears -sinuses

If you take 6 litres of air from the surface to 20meters/66feet, the volume will be ___ litres

2

A depth change of 10meters/33 feet causes a pressure change of

2 bar/ata

The density of the air in the previous question would be ___ the density at the surface

3x

I should equalize:

Before i feel pain/discomfort

On a day I plan to go diving, I wake up with my sinuses blocked due to a cold/allergy. I should:

Cancel the dive until I'm well

1-4 My buddy & I descend to 12meters/40feet. I would expect to use my air ___ at 6meters/20feet

Faster than

Failure to follow the most important rule in scuba diving can cause severe lung overexpansion injuries, which can result in paralysis or death.

TRUE

I equalize gently because an extended, forceful equalization can cause permanent damage to my ears & hearing

TRUE

My body responds to anxiety with increased breathing, but slow breathing helps reduce anxiety

TRUE

When scuba diving, normal breathing keeps your lungs equalized to the surrounding pressure

TRUE

A squeezed is caused by:

a pressure imbalance btwn the surrounding pressure & an air space

Equalization is the process of:

adding air to an air space

1-3 The most important rule in scuba diving is to

breathe continuously & never hold your breath

A balloon fully inflated & sealed at 10meters/33feet, would probably ___ during ascent to the surface

burst

The most efficient way to breathe dense air underwater is to breathe

deeply & slowly

1-1 As you descend in water the presure

increases

I'm descending & discover I can't equalize. The 1st thing I would do is:

stop my descent & signal my buddy/the instructor

During ascent I feel discomfort in my ears. I should:

stop, descend lightly & allow trapped air to work its way out