NITROX CLASS EXAM QUESTIONS
AND ANSWERS
nitrox is only technical divers - Correct Answers -false
according to dalton's law the pressure exerted by each gas in a mixture will add up to
the total pressure of the gas - Correct Answers -true
a diver using EAN33 at a depth of 21msw (70fsw) has a 1.025 partial pressure of
oxygen - Correct Answers -true
21/10=2.1
2.1+1=3.1
3.1*.33=1.025
OR
70/33=2.1
2.1+1=3.1
3.1*.33=1.025
it is your responsibility to know what breathing mixture is in your cylinder and to
maintain your equipment in a safe manner for use with nitrox - Correct Answers -true
all RGBM divers should have a 3 min safety stop at 5 msw - Correct Answers -true
the 40% rule is based on published peer reviewed research and is a definitive industry
standard - Correct Answers -false
air is mostly comprised of oxygen and other miscellaneous gases with the least
abundant gas being Nitrogen - Correct Answers -false
the ODIGTML order was originally determined to acount for the most potentially serious
physiological concerns facing dives - Correct Answers -true
EAN41 is the best mix at a depth of 24.3 (80fsw) with PPO2 of 1.4 - Correct Answers -
false
math = 0.408 but cant round down
the first precursor symptom of CNS oxygen toxicity is - Correct Answers -precursor
symptoms are highly variable
, the maximum operating depth (MOD) of a gas mixture is determined by - Correct
Answers -the maximum acceptable partial pressure of oxygen
calculate the normal MOD for EAN32 (ppo2=1.4) - Correct Answers -34msw
any equipment that is going to be exposed to a gas that contains greater than 40%
oxygen must be oxygen cleaned and free of hydrocarbons - Correct Answers -true
nitorx analyzers never need maintenance or to be calibrated - Correct Answers -false
the press of 22.7 msw is 2.27ATA - Correct Answers -false
using boyles law we can know that if you compared two 11 liter clyinders with different
pressures, the one with double the pressure also has greater volume of gas - Correct
Answers -true
at 1 atm there is 79% nitrogen or partial pressure of .79. as the diver descend the
percentage of gas does not change by the partial pressure will increase with increased
pressure - Correct Answers -true
the best mix for 28 msw is EAN 36 with pp of oxygen at 1.4 - Correct Answers -true
henry's law addressess the quantity of gas that will dissolve and describes the rate at
which the gas will dissolve - Correct Answers -false
using NOAA oxygen exposure limits the 24 limit at maximum recreational pressure (1.4)
is 200 minutes - Correct Answers -false it is 180
pulmonary oxygen toxicity is significant concern for recreational nitrox divers - Correct
Answers -fales
signs and symptoms of DCS do not vary and can be easily identified no matter the
injury or severity - Correct Answers -false
using nitrox prevents nitrogen narcosis - Correct Answers -false
the recreational diver's oxygen partial pressure range is from 0.21 to 1.4 with
contingency of 1.6 - Correct Answers -true
it is safe for diver who has a has mixture of 34% to use a nitrox 36 table - Correct
Answers -false
oxygen is explosive and flammable and to start a fire you only need oxygen and heat -
Correct Answers -false-also need fuel
AND ANSWERS
nitrox is only technical divers - Correct Answers -false
according to dalton's law the pressure exerted by each gas in a mixture will add up to
the total pressure of the gas - Correct Answers -true
a diver using EAN33 at a depth of 21msw (70fsw) has a 1.025 partial pressure of
oxygen - Correct Answers -true
21/10=2.1
2.1+1=3.1
3.1*.33=1.025
OR
70/33=2.1
2.1+1=3.1
3.1*.33=1.025
it is your responsibility to know what breathing mixture is in your cylinder and to
maintain your equipment in a safe manner for use with nitrox - Correct Answers -true
all RGBM divers should have a 3 min safety stop at 5 msw - Correct Answers -true
the 40% rule is based on published peer reviewed research and is a definitive industry
standard - Correct Answers -false
air is mostly comprised of oxygen and other miscellaneous gases with the least
abundant gas being Nitrogen - Correct Answers -false
the ODIGTML order was originally determined to acount for the most potentially serious
physiological concerns facing dives - Correct Answers -true
EAN41 is the best mix at a depth of 24.3 (80fsw) with PPO2 of 1.4 - Correct Answers -
false
math = 0.408 but cant round down
the first precursor symptom of CNS oxygen toxicity is - Correct Answers -precursor
symptoms are highly variable
, the maximum operating depth (MOD) of a gas mixture is determined by - Correct
Answers -the maximum acceptable partial pressure of oxygen
calculate the normal MOD for EAN32 (ppo2=1.4) - Correct Answers -34msw
any equipment that is going to be exposed to a gas that contains greater than 40%
oxygen must be oxygen cleaned and free of hydrocarbons - Correct Answers -true
nitorx analyzers never need maintenance or to be calibrated - Correct Answers -false
the press of 22.7 msw is 2.27ATA - Correct Answers -false
using boyles law we can know that if you compared two 11 liter clyinders with different
pressures, the one with double the pressure also has greater volume of gas - Correct
Answers -true
at 1 atm there is 79% nitrogen or partial pressure of .79. as the diver descend the
percentage of gas does not change by the partial pressure will increase with increased
pressure - Correct Answers -true
the best mix for 28 msw is EAN 36 with pp of oxygen at 1.4 - Correct Answers -true
henry's law addressess the quantity of gas that will dissolve and describes the rate at
which the gas will dissolve - Correct Answers -false
using NOAA oxygen exposure limits the 24 limit at maximum recreational pressure (1.4)
is 200 minutes - Correct Answers -false it is 180
pulmonary oxygen toxicity is significant concern for recreational nitrox divers - Correct
Answers -fales
signs and symptoms of DCS do not vary and can be easily identified no matter the
injury or severity - Correct Answers -false
using nitrox prevents nitrogen narcosis - Correct Answers -false
the recreational diver's oxygen partial pressure range is from 0.21 to 1.4 with
contingency of 1.6 - Correct Answers -true
it is safe for diver who has a has mixture of 34% to use a nitrox 36 table - Correct
Answers -false
oxygen is explosive and flammable and to start a fire you only need oxygen and heat -
Correct Answers -false-also need fuel
