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Naui Instructor Key Concepts And Revision Notes

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Naui Instructor Key Concepts And Revision Notes

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NAUI INSTRUCTOR KEY CONCEPTS
AND REVISION NOTES

◉ Nitrox mixing methods
Answer: Partial pressure blending
Nitrogen separating membrane
Continuous gas blending


◉ An oxygen analyzer should display oxygen content to an accuracy
of:
Answer: 1/10 of a percent


◉ Kelvin scale
Answer: Absolute temperature scale based on the Celsius scale


◉ Pressure
Answer: Force acting on a unit of area


◉ Objects viewed through a scuba mask appear larger and closer
due to?
Answer: Refraction

, ◉ Archemedes Principle
Answer: "An object wholly or partially immersed in a fluid is buoyed
up by a force equal to the weight of the fluid displaced."


◉ What color is absorbed first in water?
Answer: Red


◉ What color is absorbed last in water?
Answer: Violet


◉ How much does pressure increase under water per foot
Answer: 0.445 psi per foot (0.10 bar per meter)


◉ Weight of fresh vs sea water (1 cubic ft)
Answer: Fresh - 62.4
Sea - 64.0


◉ The pressure exerted by any component gas in a mixture
Answer: Partial pressure of that gas


◉ Regulators delivery air at what pressure
Answer: Ambient pressure

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