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5.0
SDI Certification Exam Review
Questions with Detailed Verified
Answers (100% Correct Answers)
/Already Graded A+
Quiz: What does SCUBA stand for?
Ans: Self
Contained
Underwater
Breathing
Apparatus
Quiz: List the three important scuba diving changes that occurred
in the 1950s
Ans: 1) Dive tables published for repetitive dives
2) Improved design/quality of scuba gear
3) Dive computers commercially available
Quiz: Name three different devices that modern dive computers
replace
Ans: Depth gauge, dive tables, watch
Quiz: What sets SDI apart from other training agencies?
Ans: Students use a personal dive computer for all instruction and
certification dives
Sunday, 02 March 2025
, Quiz: How much larger and closer do objects appear under water
and why?
Ans: 33% larger, 25% closer
Light bends in the air-space between the lens and your eyes.
Quiz: How much faster does sound move through water than air
and why?
Ans: 4 times faster in water
Water is 800x denser than air; sound travels through denser mediums at faster
rates
Quiz: What is the first color absorbed underwater?
Ans: RED (followed by OYGBIV)
Quiz: 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.
Ans: Slack
Quiz: If you are caught in a rip current, first swim _____ to the
current to get out of it before swimming towards shore.
Ans: Perpendicular
Quiz: Start your dive by swimming ____ the current
Examstudy - Stuvia US
In today's fast-paced educational landscape, students need reliable resources to excel in their studies.
5.0
SDI Certification Exam Review
Questions with Detailed Verified
Answers (100% Correct Answers)
/Already Graded A+
Quiz: What does SCUBA stand for?
Ans: Self
Contained
Underwater
Breathing
Apparatus
Quiz: List the three important scuba diving changes that occurred
in the 1950s
Ans: 1) Dive tables published for repetitive dives
2) Improved design/quality of scuba gear
3) Dive computers commercially available
Quiz: Name three different devices that modern dive computers
replace
Ans: Depth gauge, dive tables, watch
Quiz: What sets SDI apart from other training agencies?
Ans: Students use a personal dive computer for all instruction and
certification dives
Sunday, 02 March 2025
, Quiz: How much larger and closer do objects appear under water
and why?
Ans: 33% larger, 25% closer
Light bends in the air-space between the lens and your eyes.
Quiz: How much faster does sound move through water than air
and why?
Ans: 4 times faster in water
Water is 800x denser than air; sound travels through denser mediums at faster
rates
Quiz: What is the first color absorbed underwater?
Ans: RED (followed by OYGBIV)
Quiz: 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.
Ans: Slack
Quiz: If you are caught in a rip current, first swim _____ to the
current to get out of it before swimming towards shore.
Ans: Perpendicular
Quiz: Start your dive by swimming ____ the current
Examstudy - Stuvia US
