Questions & Correct Answers
(Expert Verified)
1. If an object is neutrally buoyant in fresh water, the same object placed into
salt water would...
Answer> Float
2. I blow up a balloon, tie it off, and take it to the bottom of the swimming
pool. What will happen to the balloon and the air inside it?
Answer> The balloon will get smaller and the air inside the balloon will be more
dense
3. I turn a glass upside down, trap the air in it by putting it in water, and then I
take the glass down to 10 m/33 ft. The air space would...
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, Answer> Become half the size it was at the surface
4. If I am not able to equalize my body air spaces, it may be because I have...
Answer> A cold, allergy or another medical problem
5. If my ears or sinuses hurt while I am descending, it usually means...
Answer> I am feeling a squeeze and need to equalize
6. The best place for me to position an alternate air source is...
Answer> In the triangle area formed by my chin and the lower corners of my rib
cage
7. Lung overexpansion injuries can be caused by...
Answer> Holding my breath while scuba diving
8. If my cylinder of air lasts 60 minutes while I am at the surface breathing
normally, assuming all else is the same, how long will it last at 20 m/66 ft
breathing normally?
Answer> 20 minutes
9. How often should I take my scuba cylinder to be visually inspected by my
dive center?
Answer> Once a year
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