SDI Computer Nitrox Test Questions and Correct Answers

True True or False. Oxygen Enriched Air is a term some divers use to refer to Nitrox. Nitrogen and Oxygen The air we normally breathe consists primarily of: Enriched Air, Enriched Air Nitrox, Nitrox, Etc. A mixture of nitrogen and oxygen in which the percentage of oxygen is greater than that found in air is generally called: Blender The person who creates the Nitrox used to fill scuba cylinders is referred to as a: EAN21 Which of the following is not a Nitrox mixture? EAN24, EAN21, EAN40 Longer bottom times and shorter surface intervals The primary benefits of using Nitrox include: 150 Minutes or 2.5 hours During any 24-hour period, you can be exposed to a Nitrox mixture at its Maximum Operating Depth (MOD) for up to: False True or False. Dive computers work by monitoring the presences of so-called 'silent bubbles using ultrasound. You may not be able to make a direct ascent to the surface without substantially increasing your risk of decompression sickness and your dive computer may require you to make a series of decompression stops What may happen if you go too deep or stay too long? Pausing at a fixed depth for a specified period of time to allow excess nitrogen to exit you body more slowly A decompression stop is: Specialized training, Additional equipment, and Topside support To properly engage in decompression diving requires: Nitrogen, ascend Decompression sickness usually occurs when you have an excess amount of __________ in your body and you ________ too quickly. Pain in the joints, Numbness and paralysis, and Loss of balance The most common symptoms of decompression sickness can include, but are not limited to: Administration of pure oxygen The most important first-aid procedure for a diver suspected of suffering from decompression sickness is: Recompression in a hyperbaric chamber Once a diver suspected of suffering from decompression sickness has been transported to a medical facility, proper treatment will primarily involve: 16 percent What is the minimum concentration of oxygen required to maintain consciousness at sea level? 40 percent The maximum percentage of oxygen that sport divers use in a Nitrox mixture is: 6 m/20 ft What is the maximum recommended depth for using 100 percent oxygen? In which the Fraction of Oxygen (FO2) is 32 percent The term EAN32 refers to a Nitrox mixture: 40 m/132 ft The MOD for EAN32 is: True True or False. The term MOD stands for Maximum Operating Depth. It is safe to use down to the maximum recommended sport diving depth limit of 40m/132 ft and it provides a good combination of safety and extended bottom time EAN32 is a good choice for Nitrox diving because: 1.6 The maximum partial pressure of oxygen (PO2) we use in Nitrox diving is: Pulmonary and Central Nervous System (CNS) Types of oxygen toxicity include: Oxygen toxicity The primary risk associated with Nitrox diving (as opposed to diving air) is: True True or False. The D in the acronym CONVENTID stands for dizziness. Scar tissue in the sinuses Which of the following is not a factor that may increase a diver's susceptibility to oxygen toxicity? False True or False. Divers can limit the adverse effects of long-term exposure to nitrogen by diving Nitrox less than 20 times a year. False True or False. The most important step divers can take to help avoid oxygen toxicity is to never exceed a PO2 of 2.0.