The event that led to the use of the acronym SCUBA to describe diving was:
A. Post-WWII equipment refinements
B. The invention of the diving helmet in circa 1800
C. The development of the demand regulator in 1943
D. The development of air pumps in the 19th century
C. The development of the d...
the event that led to the use of the acronym scuba to describe diving was
absolute pressure is defined as
gauge pressure is defined as
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SSI Final Exam
The event that led to the use of the acronym SCUBA to describe diving was:
A. Post-WWII equipment refinements
B. The invention of the diving helmet in circa 1800
C. The development of the demand regulator in 1943
D. The development of air pumps in the 19th century - Answer C. The development of
the demand regulator in 1943
Absolute pressure is defined as:
A. The pressure at the surface plus 1 ata
B. The weight of the water that surrounds the diver
C. The total pressure exerted on an object
D. All answers are correct - Answer C. The total pressure exerted on an object
Gauge pressure is defined as:
A. The depth reading on a gauge
B. The pressure at the surface
C. Hydrostatic pressure minus 1 ata
D. Absolute pressure minus 1 ata - Answer D. Absolute pressure minus 1 ata
One atmosphere of pressure is defined as:
A. 1 ata
B. Each 33 feet of depth in sea water
C. Each 34 feet of depth in freshwater
D. All answers are correct - Answer D. All answers are correct
The greatest relative pressure change in seawater takes place between ____ and ____
feet.
A. 0/33
B. 33/66
C. 66/99
D. 99/132 - Answer A. 0/33
If you experience pain in the ear during descent:
A. Continue the descent while gently exhaling into the mask
B. Stop the descent and ascend until the pain stops
C. Abort the dive
, D. Place a finger in the ear canal and gently massage the ear until the pain ceases -
Answer B. Stop the descent and ascend until the pain stops
Underwater, the bending of light rays causes objects to appear to be _______.
A. Closer
B. Farther away
C. The same as the surface
D. At an angle consistent with the bend of light - Answer A. Closer
Body heat is lost underwater at a rate of ______ than in air.
A. 10 times slower
B. 50 times faster
C. 25 to 30 times faster
D. same - Answer C. 25 to 30 times faster
A high pressure scuba cylinder should be stored:
A. Lying flat with no air
B. With the valve slightly open to allow air expansion
C. Secured with a minimum of 500 to 750 psi
D. Secured with the valve open - Answer C. Secured with a minimum of 500 to 750 psi
A scuba tank for recreational diving should be filled with:
A. A mixture of helium and oxygen
B. A mixture of hydrogen and oxygen
C. Pure, filtered compressed air or Nitrox
D. Pure oxygen - Answer C. Pure, filtered compressed air or Nitrox
One of the primary factors contributing to heat loss for divers is:
A. Convection
B. Refraction
C. Absorption
D. Diffusion - Answer A. Convection
The Delivery System components are:
A. A regulator and an alternate air source
B. A regulator, buoyancy compensation device, and a high pressure air cylinder
C. A regulator, alternate air source, and a high pressure scuba cylinder
D. A regulator and high pressure pressure air cylinder - Answer C. A regulator, alternate
air source, and a high pressure scuba cylinder
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