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PADI Open Water Dive Course Knowledge Reviews 1-5 with verified answers 100%
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PADI Open Water Dive Course Knowledge Reviews 1-5 with verified answers 100%Knowledge review 1 ANS - At 10 metres/33 feet you're _____ bar/ata of total pressure and the air density is ___ times as great as at the surface.
a. 1
b. 2
c. 3
d. 4 ANS - b. 2
*Pressure increases by one bar/ata for every 10 metres/33 feet of depth. So, at 10 metres/33 feet, the total pressure is 2 bar/ata (one from water pressure and one from atmospheric pressure). Density increases proportionally, so at 2 bar/ata the density is 2 times as great, at 3 bar/ata the density is 3 times as great, etc.
As I descend, I need to equalize air spaces. Which of the following are accepted ways of equalizing my ears? (choose all that apply)
a. Block my nose and attempt to gently blow through it.
b. Swallow and wiggle the jaw from side to side.
c. Block my nose and blow forcefully for an extended period. ANS - a and b *To equalize your ears and sinuses, pinch your nose and blow gently against it. This sends air from your throat into your ears and sinuses. Some people find that wiggling their jaws side-to-side and swallowing also works. Do not use forceful or extended equalizations.
During a descent, I try to equalize but discover I'm having trouble doing so. Which of the following is correct?
a. Slow my descent, signal my buddy to slow down, and equalize more forcefully.
b. Stop my descent, signal my buddy, ascend slightly and try again.
c. Continue my descent while equalizing repeatedly.
d. Signal my buddy, ascend to the surface and start my descent over.
Submit ANS - b. Stop my descent, signal my buddy, ascend slightly and try again.
*If you can't equalize, stop your descent 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 serious injuries!
I should equalize
a. early and often, before I feel discomfort.
b. only if I experience pain.
c. the same as ANS - a. early and often, before I feel discomfort.
*Equalize every metre/few feet, before you feel discomfort. If you wait until you feel discomfort, equalization may be difficult or impossible. When you equalize as often as you should, you don't feel discomfort or pain.
I should not dive with a cold, nor use medications to dive with a cold.
a. True
b. False ANS - a. True
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