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* 1. What causes atmospheric pressure at sea level?

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* 2. What is the atmospheric pressure in a) Bar and b) Kg/cm2?

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* 3. What is the absolute pressure in bar at 40m?

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* 4. What happens to the volume of gas in an inverted bucket when taken from the surface to 10m?

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* 5. What glass should be used in the construction of a face mask?

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* 6. What maintenance is required immediately after using diving equipment?

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* 7. Air pressure within the body must be kept equal to what if injury is to be avoided?

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* 8. What are the main items of scuba equipment? Please select all that apply.

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* 9. What is the name for breathing gas mixtures containing more than 22% oxygen?

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* 10. What are the test requirements of a Nitrox cylinder in the UK? Please select all that apply.

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* 11. What are the test requirements of a non-Nitrox cylinder in the UK? Please select all that apply.

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