SDI Certification Exam Review Exam
Questions with Correct Verified
Solutions 100% Guaranteed Pass
1. Which gas component in air causes decompression sickness and
narcosis? - ANS ✔Nitrogen
2. What medical can occur if a diver ascends much too rapidly for
nitrogen to be slowly released? - ANS ✔Decompression sickness
3. List five factors that can predispose a diver to decompression
sickness - ANS ✔Illness, ascending too fast, dehydration, smoking,
alcohol consumption
4. Describe the symptoms of DCS - ANS ✔Rash from bubbles in skin
capillaries, joint pain, difficulty inhaling, loss of sensation, paralysis,
could be fatal
5. How to treat a diver with decompression sickness - ANS ✔Bring
diver to surface, seek immediate medical attention, administer pure
oxygen, place person in pressure chamber
6. What is the depth threshold where most scuba divers generally
begin to be affected by nitrogen narcosis? - ANS ✔30
msw/100fsw
SDI Certification Exam Review
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SDI
7. List two feelings of being "narked" - ANS ✔Euphoric, anxious
8. How to do alleviate the symptoms of nitrogen narcosis? - ANS
✔Ascend normally until you no longer feel effects
9. What gas causes extreme headache and nausea,
unconsciousness, and bright redness of the fingernail beds and
lips? - ANS ✔Carbon monoxide
10. What may indicate that the air in the scuba cylinder is
contaminated? - ANS ✔Air has odour or taste
11. What should you do if you suddenly feel sick and develop a
headache during a scuba dive? - ANS ✔Abort dive and controlled
ascent. Breathe fresh air or oxygen
12. As pressure increases - ANS ✔Volume decreases
13. What is the main purpose of a snorkel? - ANS ✔Allows you
to conserve air from your scuba cylinder at long intervals of time at
the surface
14. How do you know if your mask fits correctly? - ANS ✔Will
tighten to your face and won't fall off via suction through your nose
15. Name one audible and one visual rescue signal device -
ANS ✔Whistle/horn
Bright-coloured lift bag
SDI Certification Exam Review
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