SSI Enriched Air Nitrox Exam Questions & Answers With Verified Tests 100% Correct Answers Latest Version (2025) Already Graded A+

Nitrox and the acronym EANx refer to mixtures with oxygen concentrations ( FO2 ) higher than : - ️️21 % The potential benefits of using the same dive tables or dive computers that you do when diving air are : - ️️You greatly simplify the dive - planning process by using the same tools as you do when diving air . You reduce your risk of DCS to some degree by basing your dive plans on the assumption your breathing mixture contains more nitrogen than it actually does . You ensure a greater safety margin All answers are correct When oxygen becomes toxic to body tissues , it most noticeably and immediately affects the : - ️️Lungs and central nervous system The fraction of oxygen ( FO2 ) value on the cylinder contents tag accurately reflects the contents of the nitrox cylinder if : - ️️You personally analyze the cylinder's FO2 content or witness the analysis Which special skills are required to dive with nitrox ? - ️️None The risk of CNS oxygen toxicity becomes more substantial above : - ️️A ppO2 of 1.6 bar A common misconception is , that compared to air , Nitrox enables Divers to dive : - ️️deeper How is the ppO2 of a breathing gas calculated ? - ️️Multiplying ambient pressure by the fraction of oxygen ( FO2 ) in the breathing gas The single most important aspect of managing your exposure to oxygen is , controlling the intensity of that exposure by determining : - ️️A Maximum Operating Depth ( MOD ) , based on a limiting pp02 of 1.4 bar or less .According to the SSI CNS Clock table you have two different CNS Clock limits . One for a single dive , and one for a 24 hr period . These limits are for an ppO2 of 1.4 bar : - ️️150 mins single dive / 180 mins 24 hrs