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Test: PADI Open Water Chapter One Quiz

Category: Sports

Description: Questions from the PADI Open Water Diver Manual

Keywords: Scuba

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

BCD, fins BCD, lungs lead weight, BCD

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

If a sealed, flexible bag of air is taken from the water surface to a depth of 30m/99ft, what is the Pressure on the bag, the Volume relative the the volume at the surface and the density o the air relative to the density at the surface

Depth Pressure Volume Density 0m/oft 1 bar/ata x 1 x 1 10m/33ft 2 bar/ata 1/2 x 2 20m/66ft 3 bar/ata 1/3 x 3 30m/99ft 4 bar/ata 1/4 x 4 40m/132ft 5 bar/ata 1/5 x 5 5 bar/ata, 1/5, X5 3 bar/ata, 1/3, X3 4 bar/ata, 1/4, X4 2 bar/ata, 1/2, X2

A squeeze is:

a pressure imbalance in which pressure inside an air space exceeds pressure outside an air space, resulting in pain or discomfort a pressure imbalance in which pressure outside an air space exceeds pressure inside an air space, resulting in pain or discomfort

You usually only feel pressure in body air spaces because:

Your body is mostly made of incompressable liquid, but air is compressible and changes volume with pressure changes. Water is denser than air, which resists pressure better

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

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

True False

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

sinuses, lungs stomach mask, ears and sinuses lungs, mask and ears

When you exhale, your lung volume decreases. This means you have _____ buoyancy.

more less

An object will be more buoyant in _____ than it will be in _____.

fresh water, salt water salt water, fresh water

An object is positively 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 to its own weight

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