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SDI Scuba Certification Exam Study Guide Questions and Complete Solutions Graded A+
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SDI Scuba Certification Exam Study Guide Questions and Complete Solutions Graded A+
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SDI Scuba CertificationExam Study Guide
Questions and Complete
Solutions Graded A+
Denning [Date] [Course title]
, Define SCUBA - Answer: S - self
C - contained
U - underwater
B - breathing
A - apparatus
List 3 important scuba diving changes that occurred in 1950s - Answer: 1) published USN dive tables
2) invented the personal dive computer
3) equipment manufacturers made improvements to the design and workmanship of gear
Name 3 different devices that modern dive computers replace - Answer: 1) dive tables
2) J-valves
3) depth gauges
What sets SDI apart from other training agencies? - Answer: 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? - Answer: 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? - Answer: 4 times faster because
water is about 800 times denser than air.
What is the first color to be absorbed underwater? - Answer: 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. - Answer: Slack tide
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