SSI Open Water Diver – Sections 1 & 2 Study Guide, Key Concepts & Practice
Questions Review
Describing diving with the acronym SCUBA came from what event? - correct answer ✔✔The
development of the demand regulator in 1943
The condition in which certain colors are diminished as depth increases is called: - correct
answer ✔✔Absorption
The greatest relative pressure change in the sea water takes place between _____ and _____
feet. - correct answer ✔✔0/33
The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water is: -
correct answer ✔✔4 ata
One atmosphere of pressure is defined as: - correct answer ✔✔- each 33 feet in saltwater
- each 34 feet in freshwater
- 1 ata
Sinus squeeze can be prevented by: - correct answer ✔✔Not diving with a cold
Body heat is lost underwater _____ than in air. - correct answer ✔✔25 to 30 times faster
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in salt water is: -
correct answer ✔✔2 ata
If a flexible air-filled container has a volume of 40 cu ft on the surface, what would the volume
be at 99 feet in sea water? (rounded off) - correct answer ✔✔10 cu ft
Questions Review
Describing diving with the acronym SCUBA came from what event? - correct answer ✔✔The
development of the demand regulator in 1943
The condition in which certain colors are diminished as depth increases is called: - correct
answer ✔✔Absorption
The greatest relative pressure change in the sea water takes place between _____ and _____
feet. - correct answer ✔✔0/33
The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water is: -
correct answer ✔✔4 ata
One atmosphere of pressure is defined as: - correct answer ✔✔- each 33 feet in saltwater
- each 34 feet in freshwater
- 1 ata
Sinus squeeze can be prevented by: - correct answer ✔✔Not diving with a cold
Body heat is lost underwater _____ than in air. - correct answer ✔✔25 to 30 times faster
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in salt water is: -
correct answer ✔✔2 ata
If a flexible air-filled container has a volume of 40 cu ft on the surface, what would the volume
be at 99 feet in sea water? (rounded off) - correct answer ✔✔10 cu ft
