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* 1. Modern regulators are referred to as being _______________ because a malfunction will result in a _______________ rather than cutting off the air supply.

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* 2. Recreational scuba units are referred to as being open circuit / demand because they only supply air when the diver _____________ and the exhaled air is____________

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* 3. Which type of depth gauge can be used for altitude diving because is reads theoretical depths?

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* 4. A __________ valve is a small valve that helps the main valve open and is found in the _________ stage regulator

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* 5. Where is a burst disk found?

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* 6. A _________ connection on a scuba tank allows the regulator to be screwed directly into the tank valve.

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* 7. The purpose of the regulator first stage is to:

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* 8. Pressure testing a scuba tank is also called a ______________ because it involves placing the tank in ______________

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* 9. Before filling a scuba tank you should:

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* 10. Name

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