Open Water Test Flashcards
(31 cards)
Water is ____x more dense than air.
800
Light travels ____ in water.
Slower
‘1 Atmosphere’ is roughly ____ psi.
14.7
Every ____ you descend into water, you add 1 Atmosphere of pressure.
33.
A cubic foot of seawater weighs about ____ lbs.
64
Sound travels ____ times as fast in water.
4x
The clarity of water is referred to as ____. It can be dirt, plankton, or salt.
Turbidity.
When submerged you are always doing one of these 3 things.
Floating, Sinking, or being neutral with the water.
Because of pressure, your wetsuit becomes neutrally buoyant at about ____ ft.
20ft
Visibly, objects in water appear ____ and ____.
Larger and closer
When going from freshwater to salt water, you should usually ____ weight.
Add.
Normal air is about __% Nitrogen and __% Oxygen and other gases.
79,21.
Nitrox is ____ enriched air, and allows you to dive ____.
Oxygen, Longer (NOT DEEPER)
The warmer a scuba tank is, the ____ the pressure will be inside the tank.
More.
What does ‘AGE’ stand for?
Arterial Gas Embolism
‘Martini’s Law’ is technically known as ____
Nitrogen Narcosis
Your Ascent Rate should be less than ____ fpm.
<30 feet per minute
Should you ascend faster than your bubbles?
NO!
Most safety stops for shallow dives are done around ____ ft and for about __ minutes.
15-25 ft, 3 min
SCUBA tanks have to be ____ tested every ____ years per the DOT.
Hydrostatically, 5 years.
What causes ‘Shallow Water Blackout’?
Excessive Hyperventilation
Air with less than ____% O2 will not support life.
10%
The heart works ___ to ___ times harder under water pressure.
1.3-1.5
When using dive tables, make sure to round ____ for depth and time.
UP
