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SDI Open Water Set Questions and Answers | 100% Pass

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SDI Open Water Set Questions and Answers | 100% Pass What is the absolute pressure (in atm) at 66 feet? - Answer-2 atm What will be the volume in a ball that is filled with two cubic feet of air at 99 feet when it's taken to the surface? - Answer-8 cubic feet How many more times dense is the a...

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  • October 7, 2024
  • 13
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
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EmillyCharlotte
EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER
©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024

SDI Open Water Set Questions and
Answers | 100% Pass

What is the absolute pressure (in atm) at 66 feet? - Answer✔✔-2 atm


What will be the volume in a ball that is filled with two cubic feet of air at 99 feet when

it's taken to the surface? - Answer✔✔-8 cubic feet

How many more times dense is the air in a balloon at 4 atm compared to the air density

at the surface? - Answer✔✔-4 X as dense

What is the abbreviation for an atmosphere? - Answer✔✔-atm

If a scuba cylindar lasts 2 hours (120 minutes) at sea level, how long will it last at 66

feet? - Answer✔✔-40 minutes

How often should a diver equalize during a descent? - Answer✔✔-Early and often

What should you do if you experience discomfort in your ears while descending? -

Answer✔✔-Stop descent, ascend a few feet. Equalize, then descend again.

What is a reverse block? - Answer✔✔-Pressure caused by air spaces in your body

expanding during ascent.

What is squeeze? - Answer✔✔-The painful compression of air spaces in your body or

equipment during descent.

What should you do if you experience a reverse block upon ascending? - Answer✔✔-

Descend a few feet until the pain subsides. Wait a few moments. Then, ascend again.


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, EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER
©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024
What is the most important rule in scuba diving? - Answer✔✔-Never hold your

breath!

What is the most serious injury that a diver can suffer from if they hold their breath while

ascending? - Answer✔✔-Lung over-expansion injury (possibly fatal)

Which gas component in air causes decompression sickness and narcosis? -

Answer✔✔-Nitrogen

What medical problem can occur if a diver ascends much too rapidly for nitrogen to be

slowly released, or off-gassed? - Answer✔✔-Decompression Sickness

List at least 5 factors that can predispose a diver to decompression sickness. -

Answer✔✔-1. Obesity

2. Age

3. Illness

4. Past/Present Injuries

5. Prior History of DCS

6. Fatigue

7. Dehydration

8. Smoke inhalation

9. Use of drugs/alcohol prior to dive

10. Repetative Dives

11. Overexertion

12. Cold Water

13. Diving at higher altitudes

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