SDI Open Water Scuba Diver Exam with 100% Verified Answers

SDI Open Water Scuba Diver Exam with 100% Verified Answers


1. Objects under water appear: Closer and larger than they do on land
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2. How much faster does sound travel in water, compared to air?: 4 times
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3. Water conducts heat away from your body: 25 times faster than air does
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4. As you descend: colors fade, reds and oranges fade first, 30 meters seem blue and gray
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5. water temp does your body need thermal protection: 86 degrees
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6. What does SCUBA mean: self-contained underwater breathing apparatus
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7. When water stratifies itself into layers, according to temperature, the bound-
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sary between layers is known as a(n):
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1: Halocline.
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2: Ichtyocline.
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3: Thermodyne.
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4: Thermocline.: Thermocline
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8. What is the primary cause of waves?: wind
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9. Which of the following factors do we take into account when measuring waves?: Hei
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ght, Length s


10. Which of the following is incorrect?: Waves are not hazardous to divers during shor
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e dives
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11. The consequences of becoming cold under water include the following except: imp
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roved judgment and coordination
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12. Because sound travels faster under water:: Its harder to determine the direc-
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stion from which a sound is coming
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13. Entering through surf requires special skills. These skills are often in-
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scluded in beginning scuba course taught in areas in which surf entries are common: tr
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ue
14. which of the following are true: Surge is the back-and-
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forth movement of water caused by passing over head
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15. Which of the following are true: The sun warming water near the equator, coupled with t
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he earth's rotation, is the primary cause of permanent ocean currents
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1s/s
10

, 16. despite its apparent warmth, divers in warm waters still need to consider to wear pro
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tection: true s


17. longshore currents always move in the same direction as prevailing off-
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sshore currents: false
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18. a rip current is a narrow flow of swiftly moving water that runs parallel to shore: false
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19. the trick to dealing with surge is to anticipate its action in order to avoid contact with
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sstationary objects: true s s


20. what is the most effective way to get out of a rip current: swim parallel to shore, until
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out of current
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2s/s
10