Enriched Air Nitrox (SC-EAN) Practice Test

Question: 1 / 400

Which statement is true about the relationship between nitrox and nitrogen exposure?

Nitrox increases nitrogen exposure significantly

Nitrox decreases nitrogen exposure compared to air

The statement that nitrox decreases nitrogen exposure compared to air is correct because nitrox is a breathing gas that contains a higher percentage of oxygen and a lower percentage of nitrogen than regular air, which is composed of approximately 21% oxygen and 79% nitrogen. When divers use nitrox during their dives, especially at depths where nitrogen absorption into the body tissues can become significant, the reduced nitrogen content in the breathing gas can lead to lower overall nitrogen exposure.

This is particularly important for divers looking to extend their bottom time while minimizing the risks associated with nitrogen narcosis and decompression sickness, which can occur due to nitrogen saturation in the tissues. By utilizing nitrox, divers can manage their nitrogen exposure more effectively than if they were using standard air, promoting a safer diving experience.

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There is no difference in nitrogen exposure

Nitrox has no impact on nitrogen levels

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