SSI Open Water Diver Final
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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 - 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 - Answer✅✅2 ata
The condition in which certain colors are diminished as depth increases is called:
-Refraction
-Turbidity
-Diffusion
,-Absorption - Answer✅✅Absorption
Earplugs
-Aid equalization of the middle of the ear
- Protect against cold
-Should never be worn while diving
-Protect ears from squeeze - 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 - 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 - Answer✅✅- Not diving with a cold
The event that led to the use of the acronym SCUBA to describe diving was: -
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 - 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
- a crushing pain high in the chest
- a sharp pain above the eyes - Answer✅✅- a sharp pain above the eyes
If you experience pain in the ear during descent:
-Stop the descent and ascend till the pain stops
- abort the dive
-place a finger in the ear canal and gently massage the ear until the pain ceases
- continue the descent while gently exhaling into the mask - Answer✅✅- continue
the descent while gently exhaling into the mask
Body heat is lost at a rate of ___ than air. - Answer✅✅25-30 times faster
Proper equalization techniques must be learned in order to:
-prevent sinus squeeze
-prevent ear pain
, -prevent squeeze injuries
- all answers are correct - Answer✅✅- all answers are correct
Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per
cubic foot. - Answer✅✅64/62.5
Underwater, the bending of light rays causes objects to appear to be: -
Answer✅✅closer
The purpose of equalization is to:
-ensure the uneven application of pressure between the water and air spaces in the
body
-prevent water from entering air spaces in the body
-introduce additional air into body air spaces in response to increasing external
pressure
-remove all fluids from body air spaces - Answer✅✅-introduce additional air into
body air spaces in response to increasing external pressure
One atmosphere of pressure is defined as
-1 ata
-each 34ft of depth in freshwater
-each 33ft of depth in saltwater
-all answers are correct - Answer✅✅-all answers are correct
The three primary features to look for in a quality Exposure System are: -
Answer✅✅Thickness,fit, seam integrity
An object immersed in water will be buoyed upward by a force ______ the weight of
the water it displaces. - Answer✅✅equal to
A high pressure scuba cylinder should be stored:
-secured with a minimum of 500 t0 750 psi
-lying flat with no air
-with the valve slightly open to allow air expansion
-secured with the valve open - Answer✅✅-secured with a minimum of 500 t0 750
psi
The most efficient breathing pattern for scuba diving is: - Answer✅✅deep balanced
inhalation followed by long balanced exhalation, without any pause
One of the primary factors contributing to heat loss for divers is:
-Absorption
-Convection
-Diffusion
-Refraction - Answer✅✅-Convection
Exam|Brand New Expert Exam
Questions with 100% Correct Clear
Answers| All Graded A+|Latest
Premium Update|100%
Guaranteed Success.
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 - 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 - Answer✅✅2 ata
The condition in which certain colors are diminished as depth increases is called:
-Refraction
-Turbidity
-Diffusion
,-Absorption - Answer✅✅Absorption
Earplugs
-Aid equalization of the middle of the ear
- Protect against cold
-Should never be worn while diving
-Protect ears from squeeze - 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 - 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 - Answer✅✅- Not diving with a cold
The event that led to the use of the acronym SCUBA to describe diving was: -
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 - 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
- a crushing pain high in the chest
- a sharp pain above the eyes - Answer✅✅- a sharp pain above the eyes
If you experience pain in the ear during descent:
-Stop the descent and ascend till the pain stops
- abort the dive
-place a finger in the ear canal and gently massage the ear until the pain ceases
- continue the descent while gently exhaling into the mask - Answer✅✅- continue
the descent while gently exhaling into the mask
Body heat is lost at a rate of ___ than air. - Answer✅✅25-30 times faster
Proper equalization techniques must be learned in order to:
-prevent sinus squeeze
-prevent ear pain
, -prevent squeeze injuries
- all answers are correct - Answer✅✅- all answers are correct
Salt water weighs ___ pounds per cubic foot and freshwater weighs ___ pounds per
cubic foot. - Answer✅✅64/62.5
Underwater, the bending of light rays causes objects to appear to be: -
Answer✅✅closer
The purpose of equalization is to:
-ensure the uneven application of pressure between the water and air spaces in the
body
-prevent water from entering air spaces in the body
-introduce additional air into body air spaces in response to increasing external
pressure
-remove all fluids from body air spaces - Answer✅✅-introduce additional air into
body air spaces in response to increasing external pressure
One atmosphere of pressure is defined as
-1 ata
-each 34ft of depth in freshwater
-each 33ft of depth in saltwater
-all answers are correct - Answer✅✅-all answers are correct
The three primary features to look for in a quality Exposure System are: -
Answer✅✅Thickness,fit, seam integrity
An object immersed in water will be buoyed upward by a force ______ the weight of
the water it displaces. - Answer✅✅equal to
A high pressure scuba cylinder should be stored:
-secured with a minimum of 500 t0 750 psi
-lying flat with no air
-with the valve slightly open to allow air expansion
-secured with the valve open - Answer✅✅-secured with a minimum of 500 t0 750
psi
The most efficient breathing pattern for scuba diving is: - Answer✅✅deep balanced
inhalation followed by long balanced exhalation, without any pause
One of the primary factors contributing to heat loss for divers is:
-Absorption
-Convection
-Diffusion
-Refraction - Answer✅✅-Convection
