PADI Open Water Diver Final Exam 2024 GRADED A

As a newly certified PADI Open Water Diver, I will be trained to dive with buddy as deep as - 18 meters/60 feet

As you descend in water, the pressure - increases

A depth change of 10 meters/33 feet causes a pressure change of - 1 bar/ata (atmosphere)

if you take 6 liters of air from the surface to 20 meters/66 feet, the volume will be - 2 liters (the density of the air would be three times the density at the surface)

A balloon fully inflated and sealed at 10 meters/33 feet, would probably ______ during ascent to the surface - burst

A squeeze is caused by - a pressure imbalance between the surrounding pressure and an air space

Equalization is the process of - adding air to an air space

The most important rule in scuba diving is to - breathe continuously and never hold your breath

During ascent I feel discomfort in my ears. I should - stop, descend slightly, and allow trapped air to work its way out

My buddy and I descend to 12 meters/40 feet. I would expect to use my air _____ at 6 meters/20 feet - faster than

The most efficient way to breathe dense air underwater is to breathe - deeply and slowly

Buoyancy - a force that pushes an object in water upward

Salt water causes more buoyancy than fresh water because it is _____ dense and weighs _____ - more

When I descend, my buoyancy tends to ________. When I ascend, it tends to _______ - decrease, increase

The three most important considerations in choosing scuba equipment are suitability, fit, and - comfort

The two basic fin styles are __________ fins - adjustable and full-foot

My primary considerations when choosing fins are fit and - blade size

BCD (buoyancy control device) - holds your kit together and allows you to adjust buoyancy throughout the dive

Regulator - delivers breathing air at the surrounding pressure when you inhale and directs exhaled air into the air

Cylinder - holds the high-pressure breathing air supplied by your regulator during the dive

Weight System - holds lead weight to counteract the positive buoyancy of your body and some of your equipment, with a mechanism for dropping some or all the weight in an emergency

The five components that make up a BCD include - an inflatable bladder, a cylinder band and harness/jacket, an LPI (low-pressure inflator) mechanism, an overpressure/quick exhaust valves, and a weight system

LPI mechanism - inflates the BCD with air from my scuba cylinder

Burst disk - a safety device that relieves accidental overpressure by releasing air before reaching the pressure at which the cylinder would fail

scuba cylinders require pressure testing _______ and visual inspection _________ - every 2-5 years, annually

The most important feature in my weight system is its - quick release

Trim means having the right _____ of weight - distribution

Failure to follow the most important rule in scuba diving can cause serious lung overexpansion injuries, which in turn can cause paralysis and death - true

An object that is neutrally buoyant in fresh water will _____ in salt water - float

Underwater objects appear - larger and/or closer

Sound travels about 4 times _____ in water than in air, making it difficult to determine its source - faster

To move efficiently as a diver, I should move - slowly and steadily