PADI Open Water Diver Exam Prep – Knowledge
Reviews 1 to 5
1. Knowledge review 1
2. At 10 metres/33 feet you're
b. 2
bar/ata of total pressure and
the air
density is times as great as at the *Pressure increases by one bar/ata for
every 10 me-
surface. tres/33 feet of depth. So, at 10 metres/33 feet,
the to- tal pressure is 2 bar/ata (one from
a. 1 water pressure and one from atmospheric
b. 2 pressure). Density increases proportionally, so
c. 3 at 2 bar/ata the density is 2 times as great, at
d. 4 3 bar/ata the density is 3 times as great, etc.
3. As I descend, I need to a and b
equalize air spaces. Which of
the following *To equalize your ears and sinuses, pinch your
are accepted ways of nose and blow gently against it. This sends air
equalizing my ears? (choose all from your throat into your ears and sinuses.
that apply) Some people find
a.Block my nose and attempt to gen- that wiggling their jaws side-to-side and
swallowing
tly blow through it. rect?
b. Swallow and wiggle the jaw
from side to side. a. Slow my descent, signal
c. Block my nose and blow my bud- dy to slow down,
forcefully for an extended and equalize more
period. forcefully.
4. During a descent, I try to
equalize but discover I'm
having trouble do- ing so.
Which of the following is cor-
, PADI Open Water Diver Exam Prep – Knowledge
Reviews 1 to 5
also works. Do not use forceful or extended equaliza- *If you can't equalize, stop your descent
tions. immediately. Signal your buddy(ies) or
instructor. Ascend slightly until the discomfort
passes and try again. If you still can't
equalize, stop the dive. Continuing to descend
with unequalized air spaces can lead to
b. Stop my descent, signal my buddy, ascend serious in-
slightly and try again.
b. Stop my descent, signal my buddy, juries!
, PADI Open Water Diver Exam Prep – Knowledge
Reviews 1 to 5
ascend slightly and try again.
c. Continue my descent while
equal- izing repeatedly.
d. Signal my buddy, ascend to
the surface and start my
descent over. Submit
5. I should equalize a. early and often, before I feel discomfort.
a. early and often, before I *Equalize every metre/few feet, before you feel
feel dis- comfort. dis- comfort. If you wait until you feel discomfort,
b. only if I experience pain. equal- ization may be diflcult or impossible.
c. the same as When you equalize as often as you should,
you don't feel dis- comfort or pain.
6. I should not dive with a cold, nor use a. True
medications to dive with a cold.
*Never dive with a cold or allergy. They can
a. True cause congestion that might block normal air
b. False flow and may make equalization diflcult or
impossible. Using cold medications is not
recommended. They can wear ott during a dive,
and can cause equalization problems as you
ascend.
7. The most important rule in
scuba diving is: a. Breathe continuously and never hold my
breath.
a. Breathe continuously and
never hold my breath. *If during ascent you hold your breath,
b. Always dive with a buddy. blocking your airway, your lungs would over
c. Keep my mask on while in the expand. Expanding air can cause serious lung
wa- ter, even at the surface. overexpansion injuries. For this reason, the
most important rule in scuba diving is to
Reviews 1 to 5
1. Knowledge review 1
2. At 10 metres/33 feet you're
b. 2
bar/ata of total pressure and
the air
density is times as great as at the *Pressure increases by one bar/ata for
every 10 me-
surface. tres/33 feet of depth. So, at 10 metres/33 feet,
the to- tal pressure is 2 bar/ata (one from
a. 1 water pressure and one from atmospheric
b. 2 pressure). Density increases proportionally, so
c. 3 at 2 bar/ata the density is 2 times as great, at
d. 4 3 bar/ata the density is 3 times as great, etc.
3. As I descend, I need to a and b
equalize air spaces. Which of
the following *To equalize your ears and sinuses, pinch your
are accepted ways of nose and blow gently against it. This sends air
equalizing my ears? (choose all from your throat into your ears and sinuses.
that apply) Some people find
a.Block my nose and attempt to gen- that wiggling their jaws side-to-side and
swallowing
tly blow through it. rect?
b. Swallow and wiggle the jaw
from side to side. a. Slow my descent, signal
c. Block my nose and blow my bud- dy to slow down,
forcefully for an extended and equalize more
period. forcefully.
4. During a descent, I try to
equalize but discover I'm
having trouble do- ing so.
Which of the following is cor-
, PADI Open Water Diver Exam Prep – Knowledge
Reviews 1 to 5
also works. Do not use forceful or extended equaliza- *If you can't equalize, stop your descent
tions. immediately. Signal your buddy(ies) or
instructor. Ascend slightly until the discomfort
passes and try again. If you still can't
equalize, stop the dive. Continuing to descend
with unequalized air spaces can lead to
b. Stop my descent, signal my buddy, ascend serious in-
slightly and try again.
b. Stop my descent, signal my buddy, juries!
, PADI Open Water Diver Exam Prep – Knowledge
Reviews 1 to 5
ascend slightly and try again.
c. Continue my descent while
equal- izing repeatedly.
d. Signal my buddy, ascend to
the surface and start my
descent over. Submit
5. I should equalize a. early and often, before I feel discomfort.
a. early and often, before I *Equalize every metre/few feet, before you feel
feel dis- comfort. dis- comfort. If you wait until you feel discomfort,
b. only if I experience pain. equal- ization may be diflcult or impossible.
c. the same as When you equalize as often as you should,
you don't feel dis- comfort or pain.
6. I should not dive with a cold, nor use a. True
medications to dive with a cold.
*Never dive with a cold or allergy. They can
a. True cause congestion that might block normal air
b. False flow and may make equalization diflcult or
impossible. Using cold medications is not
recommended. They can wear ott during a dive,
and can cause equalization problems as you
ascend.
7. The most important rule in
scuba diving is: a. Breathe continuously and never hold my
breath.
a. Breathe continuously and
never hold my breath. *If during ascent you hold your breath,
b. Always dive with a buddy. blocking your airway, your lungs would over
c. Keep my mask on while in the expand. Expanding air can cause serious lung
wa- ter, even at the surface. overexpansion injuries. For this reason, the
most important rule in scuba diving is to
