SDI Computer Nitrox Class Questions and Correct Answers

What are the most common symptoms of decompression sickness? Pain in the joints, numbness, paralysis, loss of balance, muscle weakness, and impaired thinking What is the recommended first aid for decompression sickness? Controlling their temperature and administering pure oxygen, then immediately getting them airlifted to a hospital for the decompression chamber What is the minimum concentration of oxygen required to maintain consciousness at sea level? 16% What is the maximum percentage of oxygen that sport divers use in a Nitrox mixture? 40% What is the maximum recommended depth for using 100 percent oxygen? 20 feet What FO2 does EAN 32 contain? 68 percent nitrogen and 32 percent oxygen What are two reasons why EAN32 is a good choice for Nitrox diving? Will provide you with a good combination of extended bottom time and unrestricted depth within the sport diving range, &. using EAN32 poses less risk in terms of exposure to oxygen than other richer mixtures. What is the maximum partial pressure of oxygen (PO2) we use in Nitrox diving? 1.6 What does the term oxygen toxicity mean? condition that occurs when the diver breathes a mixture of gas that allows the PO2 to exceed 1.6 by going too deep or exceeding the time limit at a lower PO2 What is the primary risk associated with Nitrox diving? Oxygen poisoning What are the words represented by the acronym CONVENTID? Con - convulsions, V - visual disturbances,E - ringing/auditory hallucinations, N - nausea, T - twitching, I - irritability/apprehension, D - dizziness