1. When filled to the pressure permitted, when a plus sign follows a current hydrostatic test date, a standard 71.2 cubic foot steel tank contains(__) cubic feet of air.

• A. 64.7
• B. 71.2
• C. 78.3
• D. 80.0

2. Avoid emptying your scuba tank completely because:

• A. You may cause metal fatigue
• B. Insects may enter the tank
• C. Moisture may enter the tank
• D. Dust may enter the tank

3. Have your scuba tank visually inspected every(__) & pressure tested every (__):

• A. Year, two years
• B. Year, five years
• C. Five years, year
• D. Year, year

4. Regular gross overfilling of scuba cylinders may cause:

• A. Metal fatigue
• B. Moisture accumulation
• C. Valve damage
• D. A DOT citation and fine

5. The optimum pressure range for scuba cylinder storage is:

• A. 100 to 300 psi
• B. 500 to 1,000 psi
• C. 2,000 to 3,000 psi
• D. Empty

6. Aluminum scuba tanks, which do not rust, require no maintenance except hydrostatic pressure testing.

• A. True
• B. False

7. The weight difference between a full and an empty 80 cubic foot scuba tank is approximately:

• A. Three pounds
• B. Five pounds
• C. Six pounds
• D. Eight pounds

8. The rate at which you release air from a scuba tank can affect the cylinder.

• A. True
• B. False

9. When you do not use your scuba tank for a year or more, you:

• A. May breathe the air provided it has no odor
• B. Should drain and replace the air
• C. Have the air analyzed for purity
• D. May breathe the air for shallow dives only

10. Which of the following scuba tanks should be pressure tested before further use?

• A. A dented steel tank
• B. A gouged aluminum tank
• C. A tank that has been in a fire
• D. All the above