# Test: PADI Open Water Chapter One Quiz

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

## 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

## 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

True False

True False

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

BCD, fins BCD, lungs lead weight, BCD

## 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

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