NITROX REVIEW EXAM QUESTIONS
AND ANSWERS
Among the terms divers may use when referring to Nitrox are - Answer-Enriched Air,
Oxygen Enriched Air, Enriched Air Nitrox, NOAA Nitrox I and II.
The air we normally breathe at sea level contains approximately 79 percent nitrogen
and ___ percent oxygen. - Answer-21
Nitrox is generally considered to be any mixture of nitrogen and oxygen in which the
percentage of oxygen is __________than that found in air. - Answer-greater
The term _________ refers to an individual who is qualified to create the Nitrox used to
fill scuba cylinders - Answer-blender
According to your study materials, among the common Nitrox mixtures sport divers use
are: - Answer-EAN 30, EAN 32, EAN 36
The primary benefits of using Nitrox include longer __________ ________ and shorter
__________ _____________ . - Answer-bottom times, surface intervals
During any 24-hour period, you can be exposed to a Nitrox mixture at its Maximum
Operating Depth (MOD) for up to ____minutes. - Answer-150
Dive computers work by calculating the approximate amount of excess nitrogen present
in your body, based on factors such as _______and ________ . - Answer-depth, time
If you go too deep or stay too long, you may not be able to make a direct ascent to the
surface without substantially increasing your risk of____________ ___________. -
Answer-decompression sickness
A decompression stop involves pausing at a fixed _________ for a specified period
of_________ to allow excess nitrogen to exit your body more slowly. - Answer-depth,
time
Decompression diving involves more _______than no-decompression diving, and
without the proper precautions can become extremely ______________ . - Answer-risk,
hazardous
Decompression sickness usually occurs when you have an excess amount
of___________ in your body and you ___________ too quickly. - Answer-nitrogen,
ascend
, The most common symptoms of decompression sickness can include, but are not
limited to, pain in the joints, ___________ ,paralysis, loss of ____________,muscle
weakness, and impaired thinking. - Answer-numbness, balance
The most important first-aid procedure for a diver suspected of suffering from
decompression sickness is administration of pure___________ - Answer-oxygen
Once a diver suspected of suffering from decompression has been transported to a
medical facility, proper treatment will primarily involve ______________ in a hyperbaric
chamber. - Answer-recompression
The minimum concentration of oxygen required to maintain consciousness at sea level
is ___percent. - Answer-16
The maximum percentage of oxygen that sport divers are likely to use in a Nitrox
mixture is ___ percent - Answer-40
The maximum recommended depth for using oxygen is_________. - Answer-6m/20ft
The term EAN32 refers to a Nitrox mixture in which the Fraction of___________ is 32
percent. - Answer-oxygen
The MOD for EAN32 is ____________ . - Answer-40m/ 132ft
The term MOD stands for __________________ Depth. - Answer-Maximum Operating
EAN32 is a good choice for Nitrox diving because it provides a good combination of
________and __________ bottom time. - Answer-safety, extended
The maximum partial pressure of oxygen(PO2) we use in Nitrox diving is ____. -
Answer-1.6
Oxygen toxicity is a physiological reaction of your body that occurs when you are
exposed to breathing mixtures containing _________ partial pressures of oxygen, or
mixtures containing___________ partial pressures of oxygen for extended periods. -
Answer-high, lower
The primary riskassociated with Nitroxdiving (as opposed todiving air) is
_________toxicity or poisoning - Answer-oxygen
List the words represented by the acronym CONVENTID. - Answer-CON: Convulsions•
V: Visual distortion• E: Ears
N: Nausea
T: Twitching•
I: Irritability•
D: Dizziness
AND ANSWERS
Among the terms divers may use when referring to Nitrox are - Answer-Enriched Air,
Oxygen Enriched Air, Enriched Air Nitrox, NOAA Nitrox I and II.
The air we normally breathe at sea level contains approximately 79 percent nitrogen
and ___ percent oxygen. - Answer-21
Nitrox is generally considered to be any mixture of nitrogen and oxygen in which the
percentage of oxygen is __________than that found in air. - Answer-greater
The term _________ refers to an individual who is qualified to create the Nitrox used to
fill scuba cylinders - Answer-blender
According to your study materials, among the common Nitrox mixtures sport divers use
are: - Answer-EAN 30, EAN 32, EAN 36
The primary benefits of using Nitrox include longer __________ ________ and shorter
__________ _____________ . - Answer-bottom times, surface intervals
During any 24-hour period, you can be exposed to a Nitrox mixture at its Maximum
Operating Depth (MOD) for up to ____minutes. - Answer-150
Dive computers work by calculating the approximate amount of excess nitrogen present
in your body, based on factors such as _______and ________ . - Answer-depth, time
If you go too deep or stay too long, you may not be able to make a direct ascent to the
surface without substantially increasing your risk of____________ ___________. -
Answer-decompression sickness
A decompression stop involves pausing at a fixed _________ for a specified period
of_________ to allow excess nitrogen to exit your body more slowly. - Answer-depth,
time
Decompression diving involves more _______than no-decompression diving, and
without the proper precautions can become extremely ______________ . - Answer-risk,
hazardous
Decompression sickness usually occurs when you have an excess amount
of___________ in your body and you ___________ too quickly. - Answer-nitrogen,
ascend
, The most common symptoms of decompression sickness can include, but are not
limited to, pain in the joints, ___________ ,paralysis, loss of ____________,muscle
weakness, and impaired thinking. - Answer-numbness, balance
The most important first-aid procedure for a diver suspected of suffering from
decompression sickness is administration of pure___________ - Answer-oxygen
Once a diver suspected of suffering from decompression has been transported to a
medical facility, proper treatment will primarily involve ______________ in a hyperbaric
chamber. - Answer-recompression
The minimum concentration of oxygen required to maintain consciousness at sea level
is ___percent. - Answer-16
The maximum percentage of oxygen that sport divers are likely to use in a Nitrox
mixture is ___ percent - Answer-40
The maximum recommended depth for using oxygen is_________. - Answer-6m/20ft
The term EAN32 refers to a Nitrox mixture in which the Fraction of___________ is 32
percent. - Answer-oxygen
The MOD for EAN32 is ____________ . - Answer-40m/ 132ft
The term MOD stands for __________________ Depth. - Answer-Maximum Operating
EAN32 is a good choice for Nitrox diving because it provides a good combination of
________and __________ bottom time. - Answer-safety, extended
The maximum partial pressure of oxygen(PO2) we use in Nitrox diving is ____. -
Answer-1.6
Oxygen toxicity is a physiological reaction of your body that occurs when you are
exposed to breathing mixtures containing _________ partial pressures of oxygen, or
mixtures containing___________ partial pressures of oxygen for extended periods. -
Answer-high, lower
The primary riskassociated with Nitroxdiving (as opposed todiving air) is
_________toxicity or poisoning - Answer-oxygen
List the words represented by the acronym CONVENTID. - Answer-CON: Convulsions•
V: Visual distortion• E: Ears
N: Nausea
T: Twitching•
I: Irritability•
D: Dizziness
