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SDI Final Exam Questions and Answers (Latest Update 2024)
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SDI Final Exam Questions and Answers (Latest Update 2024)
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SDI Final Exam Questions and Answers(Latest Update 2024)
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. - Correct
Answer ✅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. - Correct Answer ✅All of the above.
Which of the following statements is true? There may be
more than one Correct Answer .
1: Water is 400 times denser than air.
2: Water is 800 times denser than air.
3: Sound travels about four times faster underwater.
,SDI Final Exam Questions and Answers
(Latest Update 2024)
4: Both the second and the third answer are correct. -
Correct Answer ✅Both the second and the third answer are
correct.
Which of the following is/are true?
1: Water conducts heat away from your body ten times faster
than air does.
2: Water conducts heat away from your body 25 times faster
than air does.
3: Fresh water conducts heat away from your body faster
than salt water does.
4: Salt water conducts heat away from your body faster than
fresh water does. - Correct Answer ✅Water conducts heat
away from your body 25 times faster than air does.
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.
,SDI Final Exam Questions and Answers
(Latest Update 2024)
Which of the following is/are true?
1: Tides can make the water at a particular dive site
noticeably deeper or shallower than you may have
experienced previously.
2: Tidal currents can be very strong, making diving difficult or
even dangerous.
3: Strong tidal currents can have an adverse effect on
visibility.
4: All of the above. - Correct Answer ✅All of the above.
The sun warming water near the equator, coupled with the
earth's rotation, is the primary cause of permanent ocean
currents.
1: True.
2: False. - Correct Answer ✅True.
Which of the following is/are true?
1: If caught in a rip current, swim directly towards shore,
using the most powerful kick possible.
, SDI Final Exam Questions and Answers
(Latest Update 2024)
2: If caught in a rip current, swim perpendicular to shore, until
you are completely out of the rip current, then swim in
towards shore.
3: If caught in a rip current, swim parallel to shore, until you
are completely out of the rip current, then swim in towards
shore.
4: Don't fight the rip current; relax and let it carry you closer
to shore. - Correct Answer ✅If caught in a rip current, swim
parallel to shore, until you are completely out of the rip
current, then swim in towards shore.
We measure waves by their height and weight.
1: True.
2: False. - Correct Answer ✅False.
Explanation:
We measure waves by their height and length.
Which of the following best describes the formation of surf?
1: Waves energy, rebounding from its impact with shore,
crashes into oncoming waves, causing them to break.
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