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SDI Certification Exam Review Questions and Answers (Latest Update 2024)
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SDI Certification Exam Review Questions and Answers (Latest Update 2024)
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SDI Certification Exam Review Questionsand Answers (Latest Update 2024)
What does SCUBA stand for? - Correct Answer ✅Self
Contained
Underwater
Breathing
Apparatus
List the three important scuba diving changes that occurred in the
1950s - Correct 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
- Correct Answer ✅Depth gauge, dive tables, watch
What sets SDI apart from other training agencies? - Correct
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? - Correct Answer ✅33% larger, 25% closer
, SDI Certification Exam Review Questions
and Answers (Latest Update 2024)
Light bends in the air-space between the lens and your eyes.
How much faster does sound move through water than air and
why? - Correct 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? - Correct 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. - Correct Answer ✅Slack
If you are caught in a rip current, first swim _____ to the current to
get out of it before swimming towards shore. - Correct Answer
✅Perpendicular
Start your dive by swimming ____ the current - Correct Answer
✅into/against
Global currents are _____.
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