Nitrox Exam
 

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Date    (mm/dd/yr)

1. What is Nitrox?
        Any prepared O2/N2 Breathing Gas
        Similar to "Laughing Gas" in a Dentist Office
        Helium/Nitrogen/Oxygen to allow deeper diving
        A decompression treatment
2. In the term EANx, the x refers to:
        The depth you will be diving
        How many dives you have made in 24 hrs
        The percentage of O2 in the gas
        The percentage of N2 in the gas
3. You cannot get "Bent" using Nitrox
        True
        False
4. You cannot treat Decompression Illness after using Nitrox in a decompression chamber
        True
        False
5. What is the major concern using Nitrox?
        Depth
        Time
        O2 Concentration
        All of the above
6. What is the maximum pp O2 exposure over a single dive recognized by most recreational certifying agencies (NASE, PADI, SSI...etc)?
        1.6 atm
        1.3 atm
        2.0 atm
        1.4 atm
7. Using 1.4 atm as a max exposure at what depth will air reach this limit in seawater?
        240 ft
        103 ft
        185 ft
        130 ft
8. Using 1.4 atm as a max exposure, at what depth will 36% Nitrox reach this limit in seawater?
        128 ft
        220 ft
         99 ft
         95 ft
9. What is the Equivalent Air Depth (EAD) for a dive to 90ft using 32% Nitrox?
        150 ft
         25 ft
         73 ft
         50 ft
10. Who's responsibility is it to verify the Nitrox content in a cylinder?
        The manufacturer
        The dive shop
        The Fill Tech
        Yourself
11. What is the principle hazard of high O2 concentrations
        Euphoric effect
        Flammability
        Bends
        Narcotic effect
12. Which is not a symptom of O2 Toxicity (OXTOX)?
        Twitching
        Convulsions
        Visual Disturbances
        Joint Pain

Using the supplied dive tables calculate the following dive profile:

Dive 1) 85ft, 20min,   EAN 32%
Dive 2) 75ft, Max BT, EAN 36%
Surface Interval: 1:00hr

13. What is your repetitive group after the 1:00 Surface Interval?
       C
       A
       F
       G
14. What is the max time you can spend underwater on the second dive?
       14 min
       51 min
       30 min
       37 min
15. Many computers will default to what EAN% if the EAN value is not changed after the first dive?
       100%
       21%
       Will not change
       50%
16. The most important aspect of using a Nitrox computer is that...
       it is compact.
       the proper information be accurately programmed prior to diving.
       it has 3 buttons
       you can download to PC
17. Which if the following is not a method of making Nitrox?
       Continuous Flow Blending
       Pressure Swing Absorption
       Cracking
       Partial Pressure Blending
18. Nitrox cylinders can also be filled with air.
       True
       False
19. It is OK to blend your own Nitrox in your garage.
       True
       False
20. Diving Nitrox over several days O2 will not accumulate in your body
       True
       False