A Guide to Advanced Nitrox: The Full Spectrum of Nitrox Mixtures Advanced Nitrox Exam Student s Name Date Instructor s Name Score... 1. To develop a technical mindset a diver must base their limits for a dive based on: o Gas available o Equipment being used o Experience 2. Foundational skills include: o Buoyancy control and trim o Swimming and breathing o Both a and b are correct o Neither a or b is correct 3. Optimizing will help the diver master other techniques as they progress through the course. o Buoyancy control o Proper dressing techniques o Ability to choose color coordinated accessories for diving 85
Technical Diving International 4. Ideal breathing is technically known as diaphragmatically initiated breathing. o True o False 5. Boyle s Law describes the relationship between pressure and volume when the temperature is constant. o Adverse o Direct o Inverse 6. Dalton s Law is used to calculate: o Maximum operating depth (MOD) o Best mix o Partial pressure calculations 7. Hypoxia is: o Too little oxygen o Too much oxygen o Too little nitrogen o Too much nitrogen 8. While oxygen is needed to sustain the human life, too much can be harmful. o True o False 86
A Guide to Advanced Nitrox: The Full Spectrum of Nitrox Mixtures 9. The dive community recognizes a partial pressure of oxygen as the maximum recommended exposure during the working portion of a dive. o 1.2 ATA o 1.4 ATA o 1.6 ATA o 1.8 ATA 10. Divers should track their oxygen exposure by using. o Dive tables o Mathematically calculations they have developed o Oxygen Exposure Time Limits (CNS Clock) o Tide tables 11. If a diver is exposed to 1.4 ATA of oxygen on a 30 minute dive their oxygen exposure will be: Use the Oxygen Exposure Time Limits chart (CNS clock) to determine answer. o 20% o 30% o 40% o 50% 12. The term OTU stands for: o Over Time Usually o Out The Upperdeck o Oxygen Tolerance Units 87
Technical Diving International 13. Human respiration is triggered by o Carbon Dioxide o Oxygen o Carbon Monoxide o Nitrogen 14. Carbon Monoxide binds to red blood cells than oxygen. o Slower o About the same speed o Faster 15. Calculate the following using the appropriate formula. A diver diving to 25 metres will use gas how many times faster than at the surface? o 2.5 x Faster o 3.5 x Faster o 4.5 x Faster o 5.5 x Faster 16. Calculate the following using the appropriate formula. A diver diving to 95 feet will use gas how many times faster than at the surface? o 1.9 x Faster o 2.9 x Faster o 3.9 x Faster o 4.9 x Faster 88
A Guide to Advanced Nitrox: The Full Spectrum of Nitrox Mixtures 17. Calculate the following using the appropriate formula. A diver wishes to dive to 95 feet what is the best mix for this dive (Oxygen PO2 of 1.4 ata)? o 6 percent o 16 percent o 26 percent o 6 percent 18. Calculate the following using the appropriate formula. A diver wishes to dive to 25 metres what is the best mix for this dive (Oxygen PO2 of 1.4 bar)? o 33 percent o 35 percent o 38 percent o 40 percent 19. Calculate the following using the appropriate formula. A diver wants to know how deep he can dive with a mixture of 31 percent oxygen. o 35 metres or 116 feet o 30 metres or 100 feet o 27 metres or 90 feet o 24 metres or 80 feet 89
Technical Diving International 20. Calculate the following using the appropriate formula. A diver wants to know how much oxygen he will be exposed to if he dives to 20 metres with EAN 32. o.96 bar oxygen o 1.16 bar oxygen o 1.26 bar oxygen o 1.46 bar oxygen 21. Calculate the following using the appropriate formula. A diver wants to know how much oxygen he will be exposed to if he dives to 80 feet with EAN 32. o 1.10 ATA of oxygen o 1.12 ATA of oxygen o 1.14 ATA of oxygen o 1.20 ATA of oxygen 22. Calculate the following using the appropriate formula. If a diver dives to a depth of 25 metres with EAN 33 what is the equivalent air depth (EAD) for this dive? o 25.7 metres o 31.7 metres o 29.9 metres o 19.7 metres 90
A Guide to Advanced Nitrox: The Full Spectrum of Nitrox Mixtures 23. Calculate the following using the appropriate formula. If a diver dives to a depth of 105 feet with EAN 33 what is he equivalent air depth (EAD) for this dive? o 84 feet o 94 feet o 104 feet o 114 feet 24. TDI recommends all cylinders used with Nitrox mixes be: o Tumbled o Inspected every month o Properly oxygen cleaned 25. Many personal dive computers allow for the programming of various gas mixtures. o True o False 26. Respiratory Minute Volume is the amount of gas: o A diver moves in and out of their lungs in one minute o A diver breathes during a dive o A diver breathes in their diving career 91
Technical Diving International 27. Before diving with a cylinder that may contain mixed gas, a diver should: o Analyze its contents o Confirm it is what it says it is o Properly mark the cylinder 28. START is an acronym for S drill, Team, Air, Route, Tables. o True o False 29. The intent of a bailout procedure is: o To allow a diver to carry enough gas to get to the surface with a shallow safety stop o To get out of the water quickly in case of an emergency o To empty the boat of excess water so it will not sink 30. Various types of blending may include: o Partial Pressure blending o Continuous blending o Membrane separation... I certify that I understand or have had explained to me all of the questions I have missed and I have a full understanding of all material in this test and the text for this class. Signature Date 92