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SDI Scuba Certification Exam Study Guide Questions and Answers (100% Pass) $11.49   Add to cart

Exam (elaborations)

SDI Scuba Certification Exam Study Guide Questions and Answers (100% Pass)

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Define SCUBA → S - self → C - contained → U - underwater → B - breathing → A - apparatus List 3 important scuba diving changes that occurred in 1950s → 1) published USN dive tables → 2) invented the personal dive computer → 3) equipment manufacturers made improvements to t...

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  • September 25, 2024
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1 | P a g e | © copyright 2024/2025 | Grade A+



SDI Scuba Certification Exam Study
Guide Questions and Answers (100%
Pass)
Define SCUBA


→ S - self

→ C - contained

→ U - underwater

→ B - breathing

→ A - apparatus




List 3 important scuba diving changes that occurred in 1950s


→ 1) published USN dive tables

→ 2) invented the personal dive com puter

→ 3) equipment manufacturers made improvements to the design

and workmanship of gear




Name 3 different devices that modern dive computers replace


→ 1) dive tables

→ 2) J-valves




Master01 | September, 2024/2025 | Latest update

, 1 | P a g e | © copyright 2024/2025 | Grade A+


→ 3) depth gauges




What sets SDI apart from other training agencies?


→ First dive training agency to provide entry level scuba

instruction that incorporates the use of personal dive

computers --> more streamlined scuba course w/ more

instruction time in the water




How much larger and closer do objects appear underwater and why?


→ Objects underwater appear 25% larger and 25% closer




As light travels through the airspace created by the mask, it bends, creating

a magnifying effect.




How much faster does sound move through water than air and why?


→ 4 times faster because water is about 800 times denser than

air.




What is the first color to be absorbed underwater?



Master01 | September, 2024/2025 | Latest update

, 1 | P a g e | © copyright 2024/2025 | Grade A+


→ Red (within first 25 feet)




When diving from shore, the best time to dive is when there is the least

amount of tidal current. _______ tide is when there is no horizontal water

movement.


→ Slack tide




If you are caught in a rip current, first swim _____ to the current to get out of it

before swimming towards shore.


→ Parallel




Waves are usually caused by


→ Wind pushing water on the surface




T or F: Anticipate surge action to avoid contact with stationary objects


→ True




What type of marine life cause most diving injuries?




Master01 | September, 2024/2025 | Latest update

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