SSI Open Water Diver Final Exam Study
Guide Section 1 2023/ 33 Questions with
Complete Correct Solutions.
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: - -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: - -Absolute pressure minus 1 ATA
-Sinus squeeze can be prevented by: - -Not diving with a cold.
-Which of the statements concerning sound transmission underwater is correct? - -
Sound travels four times faster in water than in air; sound travels farther underwater
than air; divers find it difficult to locate the source of the sound underwater.
-The first symptom of a sinus squeeze is usually: - -A sharp pain of wedging sensation
above the eyes.
-The purpose of equalization is to: - -Introduce additional air into body air spaces in
response to increasing external pressure.
-Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per
cubic foot. - -64/62.5
-Body heat is lost underwater ___ than in air. - -25-30x faster.
-The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt
water is: - -4 ATA
-Proper equalization techniques must be learned in order to: - -Prevent squeeze
injuries, sinus squeeze and ear pain.
Guide Section 1 2023/ 33 Questions with
Complete Correct Solutions.
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: - -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: - -Absolute pressure minus 1 ATA
-Sinus squeeze can be prevented by: - -Not diving with a cold.
-Which of the statements concerning sound transmission underwater is correct? - -
Sound travels four times faster in water than in air; sound travels farther underwater
than air; divers find it difficult to locate the source of the sound underwater.
-The first symptom of a sinus squeeze is usually: - -A sharp pain of wedging sensation
above the eyes.
-The purpose of equalization is to: - -Introduce additional air into body air spaces in
response to increasing external pressure.
-Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per
cubic foot. - -64/62.5
-Body heat is lost underwater ___ than in air. - -25-30x faster.
-The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt
water is: - -4 ATA
-Proper equalization techniques must be learned in order to: - -Prevent squeeze
injuries, sinus squeeze and ear pain.
