Test your knowledge. Or don't. You'll just never know unless you try.

1. A standard way to prevent decompression sickness is...

a. Decompression stops and gradual ascent

b. Breathe enriched air (Nitrox)

c. Thin the blood with Aspirin prior to deep dives

d. Never dive below recreational dive limits (130 feet)

2. True or False: Scuba is the only kind of diving that allows for extended time underwater.

a. True

b. False

3. Which is the biggest threat to diver safety?

a. Sharks

b. Decompression sickness

c. Panic

d. Exposure

4. Can oxygen be toxic for a diver?

a. True

b. False

5. How much oxygen is in a standard scuba tank?

a. 3000 psi

b. It's all oxygen

c. 21%

d. 78%

6. Which disqualifies you from becoming a scuba diver?

a. Asthma

b. Blood pressure 180/100

c. Claustrophobia

d. Can't swim

Quiz Answers

1. A - Decompression stops and gradual ascent

2. B (False) - Surface supply diving is older than scuba diving. A surface source of air is pumped through a line to the diver below. 15th century Konrad Kyeser, illustrated his manual of military technology. Bellifortis with a diving suit fitted with a hose to the surface. 

3. C - Panic

4. A (True) - For divers, too high a concentration of oxygen in their air supply can cause nervous system damage and cell death.

5. C - 21%

6. D - Can't swim