Open Water Diver Final Exam Study Guide
(Latest 2025/ 2026 Update) Questions and
verified Answers | Grade A (100% Correct
Elaborations)
Describing diving with the acronym SCUBA came from what event?
The development of the demand regulator in 1943.
Earplugs:
Should never be worn while diving.
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)
10 cu
Absolute pressure is defined as:
The total pressure exerted on an object.
The greatest relative pressure change in sea water takes place between and feet.
0/33 ft
One atmosphere of pressure is defined as:
, Open Water Diver Final Exam Study Guide
(Latest 2025/ 2026 Update) Questions and
verified Answers | Grade A (100% Correct
Elaborations)
Each 33 ft of depth in seawater; 34 ft of depth in freshwater; 1 ATA
Underwater, the bending of light rays causes objects to appear to be:
Closer.
If you experience pain in your ears during descent:
Stop the descent and ascend until the pain stops.
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is:
2 ATA
Ear Squeeze can be prevented by:
Relaxing; never diving with a cold; and rotating the jaw, swallowing, or Valsalva
The condition in which certain colors are diminished as depth increases is called:
Absorption.
Gauge pressure is defined as:
(Latest 2025/ 2026 Update) Questions and
verified Answers | Grade A (100% Correct
Elaborations)
Describing diving with the acronym SCUBA came from what event?
The development of the demand regulator in 1943.
Earplugs:
Should never be worn while diving.
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)
10 cu
Absolute pressure is defined as:
The total pressure exerted on an object.
The greatest relative pressure change in sea water takes place between and feet.
0/33 ft
One atmosphere of pressure is defined as:
, Open Water Diver Final Exam Study Guide
(Latest 2025/ 2026 Update) Questions and
verified Answers | Grade A (100% Correct
Elaborations)
Each 33 ft of depth in seawater; 34 ft of depth in freshwater; 1 ATA
Underwater, the bending of light rays causes objects to appear to be:
Closer.
If you experience pain in your ears during descent:
Stop the descent and ascend until the pain stops.
The absolute pressure expressed in terms of atmospheres absolute at 33 feet in sea water is:
2 ATA
Ear Squeeze can be prevented by:
Relaxing; never diving with a cold; and rotating the jaw, swallowing, or Valsalva
The condition in which certain colors are diminished as depth increases is called:
Absorption.
Gauge pressure is defined as:
