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SDI OPEN WATER SCUBA DIVER EXAM 2025| BRAND
NEW ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
GUARANTEED VALUE PACK| ACE YOUR GRADES.
1. Objects under water appear - correct answer - Closer and larger than
they do on land
2. How much faster does sound travel in water, compared to air? - correct
answer - 4 times
3. Water conducts heat away from your body - correct answer - 25 times
faster than air does
4. As you descend - correct answer - colors fade, reds and oranges fade
first, 30 meters seem blue and gray
5. water temp does your body need thermal protection - correct answer -
86 degrees
6. What does SCUBA mean - correct answer - self-contained underwater
breathing apparatus
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7. When water stratifies itself into layers, according to temperature, the
boundary between layers is known as a(n):
1: Halocline.
2: Ichtyocline.
3: Thermodyne.
4: Thermocline. - correct answer - Thermocline
8. What is the primary cause of waves? - correct answer - wind
9. Which of the following factors do we take into account when measuring
waves? - correct answer - Height, Length
10. Which of the following is incorrect? - correct answer - Waves are not
hazardous to divers during shore dives
11. The consequences of becoming cold under water include the
following except - correct answer - improved judgment and coordination
12. Because sound travels faster under water: - correct answer - Its
harder to determine the direction from which a sound is coming
SDI OPEN WATER SCUBA DIVER EXAM 2025| BRAND
NEW ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
GUARANTEED VALUE PACK| ACE YOUR GRADES.
1. Objects under water appear - correct answer - Closer and larger than
they do on land
2. How much faster does sound travel in water, compared to air? - correct
answer - 4 times
3. Water conducts heat away from your body - correct answer - 25 times
faster than air does
4. As you descend - correct answer - colors fade, reds and oranges fade
first, 30 meters seem blue and gray
5. water temp does your body need thermal protection - correct answer -
86 degrees
6. What does SCUBA mean - correct answer - self-contained underwater
breathing apparatus
, Page |2
7. When water stratifies itself into layers, according to temperature, the
boundary between layers is known as a(n):
1: Halocline.
2: Ichtyocline.
3: Thermodyne.
4: Thermocline. - correct answer - Thermocline
8. What is the primary cause of waves? - correct answer - wind
9. Which of the following factors do we take into account when measuring
waves? - correct answer - Height, Length
10. Which of the following is incorrect? - correct answer - Waves are not
hazardous to divers during shore dives
11. The consequences of becoming cold under water include the
following except - correct answer - improved judgment and coordination
12. Because sound travels faster under water: - correct answer - Its
harder to determine the direction from which a sound is coming
