SDI COMPUTER NITROX CLASS
QUESTIONS WITH COMPLETE
SOLUTION
n 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
What does a Nitrox tank wrap used to identify Nitrox cylinders look like? - adhesive decal, generally 10-
13 cm/4-5 in in width, that is designed to completely encircle the diameter of the tank. The tape is
usually printed in yellow with bold green letters with the words Enriched Air and/or Nitrox printed
continuously on it. This tape makes it quick and easy to spot a Nitrox bottle in a group of tanks.
What are the two most important pieces of information that will appear on a Nitrox fill tag or label? -
Nitrox mixture used in the tank (FO2) and its MOD
What is the most important setting that must be made to your Nitrox computer before every dive? -
oxygen % (FO2) must be set
QUESTIONS WITH COMPLETE
SOLUTION
n 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
What does a Nitrox tank wrap used to identify Nitrox cylinders look like? - adhesive decal, generally 10-
13 cm/4-5 in in width, that is designed to completely encircle the diameter of the tank. The tape is
usually printed in yellow with bold green letters with the words Enriched Air and/or Nitrox printed
continuously on it. This tape makes it quick and easy to spot a Nitrox bottle in a group of tanks.
What are the two most important pieces of information that will appear on a Nitrox fill tag or label? -
Nitrox mixture used in the tank (FO2) and its MOD
What is the most important setting that must be made to your Nitrox computer before every dive? -
oxygen % (FO2) must be set
