SSI Open Water Final Exam – Comprehensive Study Guide, Key Concepts &
Practice Questions Review
Which of the statements concerning sound transmission underwater is incorrect?
-Sound will travel farther underwater then in air
-Divers find it difficult to locate the direction of a sound producing source
-Divers find it easy to talk to each other directly through water
-Sound travels four times faster underwater than in air - correct answer ✔✔-Divers find it easy
to talk to each other directly through water
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is:
-2 ata
-1 ata
- 4 ata
- 3 ata - correct answer ✔✔2 ata
The condition in which certain colors are diminished as depth increases is called:
-Refraction
-Turbidity
-Diffusion
-Absorption - correct answer ✔✔Absorption
Earplugs
-Aid equalization of the middle of the ear
- Protect against cold
-Should never be worn while diving
, -Protect ears from squeeze - correct answer ✔✔-Should never be worn while diving
Gauge pressure is defined as:
- Hydrostatic pressure minus 1 ata
- The pressure at the surface
- The depth reading on a gauge
- Absolute pressure minus 1 ata - correct answer ✔✔- Absolute pressure minus 1 ata
Sinus squeeze can be prevented by:
-Valsalva technique
- Wearing earplugs
- Tilting the divers head back and forth
- Not diving with a cold - correct answer ✔✔- Not diving with a cold
The event that led to the use of the acronym SCUBA to describe diving was: - correct answer
✔✔The development of the demand regulator in 1943
Ear squeeze can be prevented by
-Relaxing
-All answers are correct
- Never diving with a cold
- rotating the jaw, swallowing or Valsalva - correct answer ✔✔-All answers are correct
The first symptom of a sinus squeeze is usually:
- a dull pain deep within the head
- a sharp pain at the base of the neck
Practice Questions Review
Which of the statements concerning sound transmission underwater is incorrect?
-Sound will travel farther underwater then in air
-Divers find it difficult to locate the direction of a sound producing source
-Divers find it easy to talk to each other directly through water
-Sound travels four times faster underwater than in air - correct answer ✔✔-Divers find it easy
to talk to each other directly through water
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is:
-2 ata
-1 ata
- 4 ata
- 3 ata - correct answer ✔✔2 ata
The condition in which certain colors are diminished as depth increases is called:
-Refraction
-Turbidity
-Diffusion
-Absorption - correct answer ✔✔Absorption
Earplugs
-Aid equalization of the middle of the ear
- Protect against cold
-Should never be worn while diving
, -Protect ears from squeeze - correct answer ✔✔-Should never be worn while diving
Gauge pressure is defined as:
- Hydrostatic pressure minus 1 ata
- The pressure at the surface
- The depth reading on a gauge
- Absolute pressure minus 1 ata - correct answer ✔✔- Absolute pressure minus 1 ata
Sinus squeeze can be prevented by:
-Valsalva technique
- Wearing earplugs
- Tilting the divers head back and forth
- Not diving with a cold - correct answer ✔✔- Not diving with a cold
The event that led to the use of the acronym SCUBA to describe diving was: - correct answer
✔✔The development of the demand regulator in 1943
Ear squeeze can be prevented by
-Relaxing
-All answers are correct
- Never diving with a cold
- rotating the jaw, swallowing or Valsalva - correct answer ✔✔-All answers are correct
The first symptom of a sinus squeeze is usually:
- a dull pain deep within the head
- a sharp pain at the base of the neck
