SSI SCUBA Open Water Diving
Certification Exam Question and Answers
(Latest 2025)
The purpose of equalization is to - Correct Answers
✅Introduce additional air into body air spaces in response to
increasing external pressure
Body heat is lost ________ than in air - Correct Answers
✅25 to 30 times faster
The absolute pressure expressed in terms of atmospheres
absolute at 99 feet in salt water - Correct Answers ✅4 ata
One atmosphere of pressure is defined as - Correct Answers
✅- Each 34 feet of depth in freshwater
- 1 ata
- Each 33 feet of depth in sea water
Describing diving with the acronym SCUBA came from what
event? - Correct Answers ✅The development of the
demand regulator in 1943
Sinus squeeze can be prevented by - Correct Answers
✅Not diving with a cold
The greatest relative pressure change in sea water takes
place between ___ and ___ feet - Correct Answers ✅0 and
33
, SSI SCUBA Open Water Diving
Certification Exam Question and Answers
(Latest 2025)
Underwater, the bending of light rays causes objects to
appear to be: - Correct Answers ✅closer
Ear squeeze can be prevented by: - Correct Answers ✅-
Relaxing
- Never diving with a cold
- Rotating the jaw, swallowing, or Valsalva
Earplugs... - Correct Answers ✅should never been worn
while diving
If you experience pain in your ears during descent: - Correct
Answers ✅Stop the descent and ascend until the pain stops
Which of the statements concerning sound transmission
underwater is correct? - Correct Answers ✅- Divers find it
difficult to locate the direction of a sound producing source
- Sound will travel farther underwater than in air
- Sound travels four times faster underwater than in air
The absolute pressure expressed in terms of atmospheres
absolute at 33 feet in sea water is - Correct Answers ✅2
ata
Certification Exam Question and Answers
(Latest 2025)
The purpose of equalization is to - Correct Answers
✅Introduce additional air into body air spaces in response to
increasing external pressure
Body heat is lost ________ than in air - Correct Answers
✅25 to 30 times faster
The absolute pressure expressed in terms of atmospheres
absolute at 99 feet in salt water - Correct Answers ✅4 ata
One atmosphere of pressure is defined as - Correct Answers
✅- Each 34 feet of depth in freshwater
- 1 ata
- Each 33 feet of depth in sea water
Describing diving with the acronym SCUBA came from what
event? - Correct Answers ✅The development of the
demand regulator in 1943
Sinus squeeze can be prevented by - Correct Answers
✅Not diving with a cold
The greatest relative pressure change in sea water takes
place between ___ and ___ feet - Correct Answers ✅0 and
33
, SSI SCUBA Open Water Diving
Certification Exam Question and Answers
(Latest 2025)
Underwater, the bending of light rays causes objects to
appear to be: - Correct Answers ✅closer
Ear squeeze can be prevented by: - Correct Answers ✅-
Relaxing
- Never diving with a cold
- Rotating the jaw, swallowing, or Valsalva
Earplugs... - Correct Answers ✅should never been worn
while diving
If you experience pain in your ears during descent: - Correct
Answers ✅Stop the descent and ascend until the pain stops
Which of the statements concerning sound transmission
underwater is correct? - Correct Answers ✅- Divers find it
difficult to locate the direction of a sound producing source
- Sound will travel farther underwater than in air
- Sound travels four times faster underwater than in air
The absolute pressure expressed in terms of atmospheres
absolute at 33 feet in sea water is - Correct Answers ✅2
ata
