SSI Specialty Course Enriched Air Nitrox (SC-EAN) 40% Level 2 Practice Test 2025 - Free Enriched Air Nitrox Practice Questions and Study Guide

Question: 1 / 400

Which of the following is true about diving with nitrox?

Nitrox can be used at any depth without restrictions

Nitrox has more restrictive depth limitations than air

Diving with nitrox, particularly enriched air nitrox, comes with specific depth limitations that are important for diver safety. The reason option B is correct is that nitrox has a higher percentage of oxygen compared to regular air, which contains approximately 21% oxygen. When using nitrox, divers must be mindful of the maximum operating depth (MOD) based on the oxygen exposure limits. As the percentage of oxygen increases, the partial pressure of oxygen at greater depths also rises, posing a risk of oxygen toxicity. This necessitates careful planning and adherence to depth limits to ensure safety.

In contrast, using regular air generally doesn't impose such restrictive depth limitations. Therefore, divers using nitrox indeed face more stringent depth requirements than those diving with air, which is why this choice accurately reflects the implications of using nitrox in diving scenarios.

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It requires no special training or planning

Nitrox is always safer than air

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