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ADVANCED
Each question is worth 10 points.
After answering the 10 questions, click on "End Quiz" to see your score! Good luck!

Quiz Score: out of 100
1. Air in your scuba tank is comprised of ___ oxygen and ___ nitrogen.
79%, 21%
 50%, 50%
 21%, 79%
 pure, no

2. Breathing dry air, a scuba diver tends to become dehydrated while diving due to:
Moisturizing dry inhaled air
Excessive perspiration
 Saltwater absorbing moisture from the skin
 eating too much kelp
3. A scuba cylinder should be hydrostatically tested every:
6 months
 year
5 years
 15 minutes
4. A dive team caught in a rip current taking them in a direction they do not want to go, should:
Descend immediately
 Swim at a right angle to the current
 Swim against the current
 Swim with the current

5. A safe ascent rate would be:
30 feet/minute
 60 feet/minute
 as slow as you can bear
 follow your quarter-sized bubbles

6. When you practice neutral bouyancy, inhalations will cause you to ______ and exhaling will cause you to ______ .
ingas, outgas
 roll, wiggle
 rise, fall
 implode, explode
7. A precautionary safety stop at a depth of 15 feet for 3 minutes...
Is a no-no
 Prevents air embolisms
 Mandatory for dives deeper than 20 feet
 Helps eliminate nitrogen in your system safely through respiration

8. If you take a balloon to the bottom of a swimming pool, the density of the air in the balloon will:
Decrease
 Increase
 Not change
9. On ascent, remember to release expanding air in your BC to prevent:
Rapid ascent
 Squeeze
Nitrogen Narcosis
 An Explosion

10. Choose the correct equation for Boyle's Law:
P1V1=P2V2
 Y=MX+B
 E=MC2
 P/V ÷ P/V