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SDI Certification Exam Review Exam Questions and Complete Answers Graded A+.
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SDI Certification Exam Review Exam Questions and Complete Answers Graded A+.
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SDI CertificationExam Review
Exam Questions
and Complete
Answers Graded
Denning [Date] [Course title]
, What does SCUBA stand for? - Answer: Self
Contained
Underwater
Breathing
Apparatus
List the three important scuba diving changes that occurred in the 1950s - Answer: 1) Dive tables
published for repetitive dives
2) Improved design/quality of scuba gear
3) Dive computers commercially available
Name three different devices that modern dive computers replace - Answer: Depth gauge, dive tables,
watch
What sets SDI apart from other training agencies? - Answer: Students use a personal dive computer for
all instruction and certification dives
How much larger and closer do objects appear under water and why? - Answer: 33% larger, 25% closer
Light bends in the air-space between the lens and your eyes.
How much faster does sound move through water than air and why? - Answer: 4 times faster in water
Water is 800x denser than air; sound travels through denser mediums at faster rates
What is the first color absorbed underwater? - Answer: RED (followed by OYGBIV)
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
If you are caught in a rip current, first swim _____ to the current to get out of it before swimming
towards shore. - Answer: Perpendicular
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