Open Water Diver
A depth change of 10 metres/33 feet causes a pressure change of...
1 bar/ata
At 33 feet, my air supply lasts... ...as long as it would at the surface.
1/2
At a depth of 66 ft, the air volume is... (ratio)
1/3
At 30 metres/99 feet, my air supply lasts... ...as long as it would at the surface.
1/4
In water, pressure increases by one bar for each... ... you descend.
10 metres/33 feet
As a PADI Scuba Diver, I may dive under PADI Instructor or PADI Divemast supervision as deep as...
12 metres/40 feet
As a newly certified PADI Open Water Diver, I will be trained to dive with a buddy as deep as...
18 metres/60 feet
If you take 6 litres of air from the surface to 20 metres/66 feet, the volume will be... ... litres.
2
If you take 6 litres of air from the surface to 20 metres/66 feet, the density will be... ... the density at the surface.
3 times
At a depth of 132 ft, the air density is... (x#)
5
PADI's four E philosophy is...
Equipment, Education, Experience, and Environment
The three basic parts of the PADI Open Water Diver course are...
Knowledge Development, Confined Water Dives, and Open Water Dives
... can happen if the most important rule in scuba diving is not followed.
Lung overexpansion
PADI stands for...
Professional Association of Diving Instructors
I should equalize gently because...
a forceful extended equalization can cause serious permanent injuries to my ears and hearing.
Diving with earplugs can cause...
air spaces in my ears.
Equalization is...
balancing body air space pressure with outside pressure
The most important rule in SCUBA diving is...
breathe continuously and never, ever hold your breath.
A balloon fully inflated and sealed at 10 metres/33 feet, would probably... ... during ascent to the surface.
burst
A squeeze is...
compression of body air space
Diving with a cold or allergy can cause...
congestion that might block normal airflow and make equalization impossible.
Air volume... ...with pressure.
decreases proportionally
If I can't equalize and keep descending, ... can happen.
eardrum rupture, sinus rupture, and/or bruising around my eyes
The three major body air spaces that increasing pressure affects are...
ears, sinuses, and mask
The deeper I am, the... ... I use my air.
faster
Other body air spaces that are affected by increasing pressure are...
filled teeth and dry suits.
The requirements for earning my certification are...
five Knowledge Development sections, five Confined Water Dives, and four Open Water Dives over two days.
If I feel discomfort in any air space during ascent, I shall...
immediately slow and stop my ascent, descend a metre/few feet to reduce discomfort, and ascend more slowly.
As you descend in water, the pressure...
increases
Air density... ... with pressure.
increases proportionally
It is important to master buoyancy control because...
it affects almost everything I do in and underwater.
I should equalize every...
metre or few feet
Salt water weighs... ... than fresh water.
more
When I descend, my buoyancy becomes...
negative
When I ascent, my buoyancy becomes...
positive
To reduce anxiety when under stress, I breath in a... ...manner
slow and deep
The most efficient way to breathe dense air underwater is...
slow, deep breaths. Dive relaxed!
If I can't equalize, I should...
stop my descent and signal to my buddies or instructor. Ascend slightly and equalize.
The three most important considerations in choosing scuba equipment are...
suitability, fit, and comfort
Buoyancy is caused by...
water displacement
Two pieces of equipment that I use to control buoyancy are...
weight system and buoyancy control device (BCD)
A reverse block is...
when expanding air becomes trapped in a body air space.
