SSI Open Water Diver Final Exam Study
Guide Section 1 questions with answers
Describing diving with the acronym SCUBA came from what event? - ANSWER: ➡ The
development of the demand regulator in 1943.
Earplugs: - ANSWER: ➡ 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) - ANSWER: ➡ 10 cu
Absolute pressure is defined as: - ANSWER: ➡ The total pressure exerted on an object.
The greatest relative pressure change in sea water takes place between ____ and ____ feet. -
ANSWER: ➡ 0/33 ft
One atmosphere of pressure is defined as: - ANSWER: ➡ 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: - ANSWER: ➡ Closer.
If you experience pain in your ears during descent: - ANSWER: ➡ 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: -
ANSWER: ➡ 2 ATA
Ear Squeeze can be prevented by: - ANSWER: ➡ 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: - ANSWER: ➡
Absorption.
Gauge pressure is defined as: - ANSWER: ➡ Absolute pressure minus 1 ATA
Sinus squeeze can be prevented by: - ANSWER: ➡ Not diving with a cold.
Which of the statements concerning sound transmission underwater is correct? - ANSWER: ➡
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: - ANSWER: ➡ A sharp pain of wedging sensation
above the eyes.
The purpose of equalization is to: - ANSWER: ➡ 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. -
ANSWER: ➡ 64/62.5
Body heat is lost underwater ___ than in air. - ANSWER: ➡ 25-30x faster.
The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water is: -
ANSWER: ➡ 4 ATA
Proper equalization techniques must be learned in order to: - ANSWER: ➡ Prevent squeeze injuries,
sinus squeeze and ear pain.
The 6 Systems of Diving Equipment and Gear: - ANSWER: ➡ Six Systems: Snorkel, Exposure,
Delivery, Information, Buoyancy and Accessory.
Guide Section 1 questions with answers
Describing diving with the acronym SCUBA came from what event? - ANSWER: ➡ The
development of the demand regulator in 1943.
Earplugs: - ANSWER: ➡ 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) - ANSWER: ➡ 10 cu
Absolute pressure is defined as: - ANSWER: ➡ The total pressure exerted on an object.
The greatest relative pressure change in sea water takes place between ____ and ____ feet. -
ANSWER: ➡ 0/33 ft
One atmosphere of pressure is defined as: - ANSWER: ➡ 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: - ANSWER: ➡ Closer.
If you experience pain in your ears during descent: - ANSWER: ➡ 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: -
ANSWER: ➡ 2 ATA
Ear Squeeze can be prevented by: - ANSWER: ➡ 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: - ANSWER: ➡
Absorption.
Gauge pressure is defined as: - ANSWER: ➡ Absolute pressure minus 1 ATA
Sinus squeeze can be prevented by: - ANSWER: ➡ Not diving with a cold.
Which of the statements concerning sound transmission underwater is correct? - ANSWER: ➡
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: - ANSWER: ➡ A sharp pain of wedging sensation
above the eyes.
The purpose of equalization is to: - ANSWER: ➡ 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. -
ANSWER: ➡ 64/62.5
Body heat is lost underwater ___ than in air. - ANSWER: ➡ 25-30x faster.
The absolute pressure expressed in terms of atmospheres absolute at 99 feet in salt water is: -
ANSWER: ➡ 4 ATA
Proper equalization techniques must be learned in order to: - ANSWER: ➡ Prevent squeeze injuries,
sinus squeeze and ear pain.
The 6 Systems of Diving Equipment and Gear: - ANSWER: ➡ Six Systems: Snorkel, Exposure,
Delivery, Information, Buoyancy and Accessory.
