SSI Open Water Diver Final Test
questions with answers
Ear squeeze can be prevented by: - ANSWER: ➡ All answers are correct
-Never diving with a cold
-Rotating the jaw, swallowing or Valsalva
-Relaxing
The purpose of equalization is to: - ANSWER: ➡ Introduce additional air into body air spaces in
response to increasing external pressure
Body heat is lost at a rate of ___ than air. - ANSWER: ➡ 25-30 times faster
Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per cubic foot. -
ANSWER: ➡ 64/62.5
Sinus squeeze can be prevented by: - ANSWER: ➡ Not diving with a cold
Earplugs: - ANSWER: ➡ Should never be worn when diving
The condition in which certain colors are diminished as depth increases is called: - ANSWER: ➡
absorption
The first symptom of a sinus squeeze is usually: - ANSWER: ➡ A sharp pain or wedging sensation
above the eyes
The greatest relative pressure change in sea water takes place between ____ and ____ feet. -
ANSWER: ➡ 0/33ft
, If you experience pain in the ear during descent: - ANSWER: ➡ Stop the descent and ascend until
the pain stops.
Proper equalization techniques must be learned in order to: - ANSWER: ➡ - Prevent ear pain
- prevent squeeze injuries
- prevent sinus squeeze
( all answers are correct)
The absolute pressure expressed in terms of atmosphere absolute at 99 feet in salt water is: -
ANSWER: ➡ 4 ata
Gauge pressure is defined as: - ANSWER: ➡ Absolute pressure minus 1 ata
Underwater, the bending of light rays causes objects to appear to be: - ANSWER: ➡ closer
Which of the statements concerning sound transmission underwater is correct? - ANSWER: ➡ all
answers are correct
-travels farther
-4x faster
-hard to know which direction
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) - ANSWER: ➡ 10 cu ft
The event that led to the use of the acronym SCUBA to decried diving was: - ANSWER: ➡ The
development of the demand regulator in 1943
One atmosphere of pressure is defined as: - ANSWER: ➡ all correct:
-1 ata
-Each 34 feet of depth in freshwater
questions with answers
Ear squeeze can be prevented by: - ANSWER: ➡ All answers are correct
-Never diving with a cold
-Rotating the jaw, swallowing or Valsalva
-Relaxing
The purpose of equalization is to: - ANSWER: ➡ Introduce additional air into body air spaces in
response to increasing external pressure
Body heat is lost at a rate of ___ than air. - ANSWER: ➡ 25-30 times faster
Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per cubic foot. -
ANSWER: ➡ 64/62.5
Sinus squeeze can be prevented by: - ANSWER: ➡ Not diving with a cold
Earplugs: - ANSWER: ➡ Should never be worn when diving
The condition in which certain colors are diminished as depth increases is called: - ANSWER: ➡
absorption
The first symptom of a sinus squeeze is usually: - ANSWER: ➡ A sharp pain or wedging sensation
above the eyes
The greatest relative pressure change in sea water takes place between ____ and ____ feet. -
ANSWER: ➡ 0/33ft
, If you experience pain in the ear during descent: - ANSWER: ➡ Stop the descent and ascend until
the pain stops.
Proper equalization techniques must be learned in order to: - ANSWER: ➡ - Prevent ear pain
- prevent squeeze injuries
- prevent sinus squeeze
( all answers are correct)
The absolute pressure expressed in terms of atmosphere absolute at 99 feet in salt water is: -
ANSWER: ➡ 4 ata
Gauge pressure is defined as: - ANSWER: ➡ Absolute pressure minus 1 ata
Underwater, the bending of light rays causes objects to appear to be: - ANSWER: ➡ closer
Which of the statements concerning sound transmission underwater is correct? - ANSWER: ➡ all
answers are correct
-travels farther
-4x faster
-hard to know which direction
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) - ANSWER: ➡ 10 cu ft
The event that led to the use of the acronym SCUBA to decried diving was: - ANSWER: ➡ The
development of the demand regulator in 1943
One atmosphere of pressure is defined as: - ANSWER: ➡ all correct:
-1 ata
-Each 34 feet of depth in freshwater
