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SDI Certification Exam Review Questions and Answers| 100% Pass

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SDI Certification Exam Review Questions and Answers| 100% Pass 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 desig...

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  • October 7, 2024
  • 8
  • 2024/2025
  • Exam (elaborations)
  • Questions & answers
  • SDI
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EmillyCharlotte
EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER
©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024

SDI Certification Exam Review
Questions and Answers| 100% Pass

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

1/8

, EMILLYCHARLOTTE 2024/2025 ACADEMIC YAER
©2024 EMILLYCHARLOTTE. ALL RIGHTS RESERVED
FIRST PUBLISH SEPTEMBER 2024
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

Start your dive by swimming ____ the current - Answer✔✔-into/against

Global currents are _____.

Local currents ____. - Answer✔✔-Fixed

Fluctuate

Rip current - Answer✔✔-Current which goes seaward due to ocean floor stuctures

Long shore current - Answer✔✔-Flows parallel to shore

Waves are caused by - Answer✔✔-energy generated by WIND

Tides are caused by - Answer✔✔-polarity of the moon

T/F: Anticipate surge action to avoid contact with stationary objects. - Answer✔✔-

True

What is surge - Answer✔✔-Back and forth motion underwater which you shouldn't

fight; move deeper and away from dangerous objects if caught in one. USE THEM TO

YOUR ADVANTAGE

2/8

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