Objects underwater appear Study guides, Class notes & Summaries
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SDI Scuba Certification Exam Study Guide Questions and Answers | Latest Update 2024/2025
- Exam (elaborations) • 21 pages • 2024
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Define SCUBA 
 ~~> S - self 
C - contained 
U - underwater 
B - breathing 
A - apparatus 
List 3 important scuba diving changes that occurred in 1950s 
 ~~> 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 
 ~~> 1) dive tables 
2) J-valves 
3) depth gauges 
What sets SDI apart from other training agencies? 
2 | P a g e |...
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SDI Scuba Certification Exam Study Guide Questions and Answers 2024
- Exam (elaborations) • 12 pages • 2024
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Available in package deal
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Define SCUBA - S - self 
C - contained 
U - underwater 
B - breathing 
A - apparatus 
 
List 3 important scuba diving changes that occurred in 1950s - 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 - 1) dive tables 
2) J-valves 
3) depth gauges 
 
What sets SDI apart from other training agencies? - First dive training agency to...
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SDI Scuba Certification Exam Study Guide | 80 Questions with 100% Correct Answers | Verified | Latest Update 2024
- Exam (elaborations) • 12 pages • 2024
- Available in package deal
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- $10.49
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Define SCUBA - 
S - self 
C - contained 
U - underwater 
B - breathing 
A - apparatus 
List 3 important scuba diving changes that occurred in 1950s - 
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 - 
1) dive tables 
2) J-valves 
3) depth gauges 
What sets SDI apart from other training agencies? - First dive training agency to p...
-
Dive master exam Questions With Answers Graded A+ Assured Success
- Exam (elaborations) • 13 pages • 2024
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What is visual reversal? - in very clear water objects appear further away due to the particles in 
the water that resembles haze over great distance 
An hour after surfacing from a deep dive, a diver complains of fatigue and numbness in one shoulder. 
This diver should seek medical attention because the diver may have: 
a. carried equipment that was too heavy. 
b. decompression illness. 
c. contaminated air poisoning 
d. overexertion - b 
Why does water absorb more heat than air? - - it is dens...
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NAUI SCUBA Exam Questions with Correct Answers
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NAUI SCUBA Exam Questions with Correct Answers 
Underwater basic physics - Answer-Density of H2O = 800X more dense than air 
 
Being underwater effects: 
 
How we hear sounds 
Bodies thermal capabilities aka faster heat loss 
Our ability to move 
 
And creates Drag Effect 
 
Need to knows about LIGHT underwater - Answer-Light is absorbed as depth increases 
 
Warm colors (Red Orange Yellow Green) fade 
 
Cool colors (Blue Indigo Violet Remain) 
 
Refraction occurs, objects appear 25-33% bigge...
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SDI Final Exam | 65 Questions with 100% Correct Answers | Verified | Updated 2024
- Exam (elaborations) • 25 pages • 2024
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Objects under water appear: 
1: The same size as they do on land. 
2: Twice as large as they do on land. 
3: Closer and larger than they do on land. 
4: Smaller and farther away than they do on land. - Closer and larger than they do 
on land. 
As you descend: 
1: Colors appear to fade. 
2: Reds and oranges are among the first colors to disappear. 
3: At 30 m/99 ft, little color remains other than blues, grays, blacks and whites. 
4: All of the above. - All of the above. 
Which of the following s...
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Final Exam:SDI:SDI Final Exam 100% Verified Questions & Answers: Latest Updated A Plus Score Solution
- Exam (elaborations) • 27 pages • 2024
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Which of the following is not true? Divers should equalize: 
1: Preemptively before descent. 
2: Well before feeling any pain or discomfort. 
3: As soon as they feel any pain or discomfort. 
4: Early and often during descent. 
(Ans- As soon as they feel any pain or discomfort. 
 
Objects under water appear: 
1: The same size as they do on land. 
2: Twice as large as they do on land. 
3: Closer and larger than they do on land. 
4: Smaller and farther away than they do on land. 
 (Ans- Closer and...
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SDI Scuba Certification Exam Study Guide | 80 Questions with 100% Correct Answers | Verified | Latest Update 2024
- Exam (elaborations) • 12 pages • 2023
-
- $14.49
- + learn more
Define SCUBA - 
S - self 
C - contained 
U - underwater 
B - breathing 
A - apparatus 
List 3 important scuba diving changes that occurred in 1950s - 
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 - 
1) dive tables 
2) J-valves 
3) depth gauges 
What sets SDI apart from other training agencies? - First dive training agency to p...
-
SDI Scuba Certification Exam Study Guide (2022/2023) Already Passed
- Exam (elaborations) • 20 pages • 2023
- Available in package deal
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- $9.99
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SDI Scuba Certification Exam Study Guide (2022/2023) Already Passed Define SCUBA S - self C - contained U - underwater B - breathing A - apparatus 
List 3 important scuba diving changes that occurred in 1950s 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 1) dive tables 2) J-valves 3) depth gauges 
What sets SDI apart from other trai...
-
SDI Scuba Certification Exam Study Guide questions and answers
- Exam (elaborations) • 14 pages • 2024
- Available in package deal
-
- $7.99
- + learn more
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 ...
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