Compressed hydrogen
Compressed Oxygen
Compressed Air
Compressed H2s

2. An unconscious diver should be given:.

Oxygen
Water
Fresh air
Aspirin

3. When viewed underwater, objects tend to be magnified by what %.

35%
25%
20%
15%

4. The signs and symptoms of nitrogen narcosis normally begin to occur at approx. what depth?

150 feet / 45 meters
100 feet / 30 meters
200 feet / 60 meters
50 feet / 15 meters

5. Vertigo means ?

infection of inner ear
Ruptured ear drum
Inner ear infection
Dizziness

6. Which portion of the ear is most effected by pressure changes ?

Outer ear
Inner ear
Middle ear
Round window

7. To what pressure is a scuba tank filled during a Hydrostatic test ?

130 % of its working pressure
200 % of its working pressure
5/3s of its working pressure
115% of its static pressure

8. A demand valve will provide air when :

Exhalation only
Inhalation & exhalation
Inhalation only
Constant flow

9. Most dive tables were not designed for use above an altitude of :

5000 feet
500 feet
10,000 feet
1000 feet

10. A black out normally occurs on ascent because :

The partial pressure of the alveolar oxygen rapidly decreases
The partial pressure of the alveolar carbon dioxide increases
The partial pressure of the inner ear cause a vertigo
The partial pressure of the carbon dioxide decreases rapidly