SDI FINAL EXAM QUESTION LATEST 2024-2025
COMPLETE 250 QUESTIONS AND CORRECT DETAILED
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Any time you cannot inhale while scuba diving (such as when a regulator is out of
your mouth), you must be:
1: Holding your breath to conserve your remaining air.
2: Exhaling.
3: Monitoring your depth to avoid accidental ascents while breath holding.
4: Both the first and third answers are correct. - CORRECT ANSWER✔✔Exhaling.
Among the best ways to prevent decompression sickness (DCS):
1: Remain well within your dive computer's no-decompression limit.
2: Ascend no faster than the rate allowed by the dive computer.
3: Make a safety stop of between three and five minutes at a depth of 3-6 m/10-
20 ft.
4: All of the above. - CORRECT ANSWER✔✔All of the above.
Contributing factors to decompression sickness can include:
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1: Rapid ascents.
2: 'Pushing" or exceeding your computer's no-decompression limits.
3: Heavy exertion and/or dehydration.
4: All of the above. - CORRECT ANSWER✔✔All of the above.
If symptoms such as euphoria, anxiety or motor skill impairment make you
suspect you are suffering from narcosis, the best response is to:
1: Perform an Emergency Swimming Ascent (ESA).
2: Ascend to a depth at which the symptoms disappear.
3: Switch to your buddy's alternate air source.
4: None of the above. - CORRECT ANSWER✔✔Ascend to a depth at which the
symptoms disappear.
What should you do if you suddenly feel ill and/or develop a headache during a
scuba dive?
1: Consult a physician as soon as possible.
2: End the dive and make a normal, slow ascent.
3: Ascend to a depth where the symptoms dissipate.
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4: Both the first and third answers are correct. - CORRECT ANSWER✔✔End the
dive and make a normal, slow ascent.
A mask must cover the nose:
1: To prevent water from entering.
2: To ensure the best possible fit.
3: So that you can keep the pressure inside the mask equal to the pressure
outside.
4: Both the first and second answers are correct. - CORRECT ANSWER✔✔So that
you can keep the pressure inside the mask equal to the pressure outside.
Among the limitations of full foot fins:
1: They are not well suited for colder-water diving.
2: There are no full-foot fins sufficiently powerful for use with scuba equipment.
3: They are not well suited for entries from rocky shores.
4: Both the first and third answers are correct. - CORRECT ANSWER✔✔Both the
first and third answers are correct.
Explanation:
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Full foot fins are not well suited for diving in cold water or from rocky shores.
Higher-end full-foot fins may have sufficient power for overcoming the additional
drag of scuba equipment (although many full-foot fins do not).
To help prevent mildew, store equipment in a sealed container before it dries.
1: True
2: False - CORRECT ANSWER✔✔False
Which of the following statements is not true?
1: Wet suits work by surrounding your body with a low-density material
(neoprene) foam, that retards heat loss through radiation.
2: To work, a wet suit must fit snugly to reduce the amount of cold water that
circulates through the suit.
3: Wet suits are unnecessary in water warmer than 25 °C/77 °F.
4: Dive skins help protect you from scrapes, abrasion and sunburn; however, they
offer little in the way of insulation. - CORRECT ANSWER✔✔Wet suits are
unnecessary in water warmer than 25 °C/77 °F.
Your body loses the greatest amount of heat through the:
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