SISOSCB008
SCUBA DIVE USING ENRICHED AIR NITROX
QUESTIONS AND ANSWERS.
Question 1. What is Nitrox?
Nitrox refers to any gas mixture composed of nitrogen and oxygen. Question 2.
The air that we breathe consists mainly of (approximately)? 78%
Nitrogen and 21% Oxygen.
Question 3. What terminology is used to describe Enriched Air Nitrox and composition, use the example of
32% of oxygen? (Select all correct)
☒ Nitrox 32
☒ Enriched Air Nitrox 32
☐ Trimix 32
☒ EAN32
☐ Enriched Air 32
☐ Enriched Air Nitrox 68
Question 4. The two (2) most commonly used Enriched air Nitrox mixtures in recreational diving are? 68% of
Nitrogen and 32% of Oxygen
64% of Nitrogen and 36% of Oxygen
Question 5. Named the three (3) primary benefits of using Enriched Air Nitrox.
, Help to increase the allowed diving bottom time. Shorter
Surface Intervals.
Longer repetitive dive times.
Question 6. With the SSI Nitrox Specialty what the mixture range you can use in your blend?
a. 21% - 40%
b. 22% - 40%
c. 21% - 36%
d. 32% - 36%
Question 7. Is it true, that Enriched air nitrox is designed for ultra-deep diving?
a. Yes, with Enriched air nitrox you can dive much deeper than with air
b. Yes, but only in warm water
c. No, Enriched air nitrox has more restrictive depth limitations than air
d. It doesn't matter if you use air, Enriched air nitrox, or any other gas, both have the same depth limitations
Question 8. Diving with Enriched air nitrox reduces the exposure to nitrogen; therefore, you can't get decompression
sickness while diving with Enriched air nitrox.
☐ True ☒ False
Question 9. The maximum limit ppO2 and maximum emergency limit ppO2 for recreational Enriched air nitrox dives
are:
a. 1..6
b. 1..6
c. 1..4
d. 1..4
Question 10. Until such time, as researchers can’t verify impact, if any, Enriched air nitrox has on narcosis, you should
not count on experiencing less narcosis when diving with enriched air nitrox than compressed air at
comparable depths.
☒ True ☐ False
Question 11. Can we use Enriched air Nitrox to reduce the risk of Decompression Sickness?
☐ True ☒ False
Question 12. What measures can be done to add an additional safety margin while diving with Enriched air nitrox?
By using the no-decompression limits of a dive computer or air tables.
SCUBA DIVE USING ENRICHED AIR NITROX
QUESTIONS AND ANSWERS.
Question 1. What is Nitrox?
Nitrox refers to any gas mixture composed of nitrogen and oxygen. Question 2.
The air that we breathe consists mainly of (approximately)? 78%
Nitrogen and 21% Oxygen.
Question 3. What terminology is used to describe Enriched Air Nitrox and composition, use the example of
32% of oxygen? (Select all correct)
☒ Nitrox 32
☒ Enriched Air Nitrox 32
☐ Trimix 32
☒ EAN32
☐ Enriched Air 32
☐ Enriched Air Nitrox 68
Question 4. The two (2) most commonly used Enriched air Nitrox mixtures in recreational diving are? 68% of
Nitrogen and 32% of Oxygen
64% of Nitrogen and 36% of Oxygen
Question 5. Named the three (3) primary benefits of using Enriched Air Nitrox.
, Help to increase the allowed diving bottom time. Shorter
Surface Intervals.
Longer repetitive dive times.
Question 6. With the SSI Nitrox Specialty what the mixture range you can use in your blend?
a. 21% - 40%
b. 22% - 40%
c. 21% - 36%
d. 32% - 36%
Question 7. Is it true, that Enriched air nitrox is designed for ultra-deep diving?
a. Yes, with Enriched air nitrox you can dive much deeper than with air
b. Yes, but only in warm water
c. No, Enriched air nitrox has more restrictive depth limitations than air
d. It doesn't matter if you use air, Enriched air nitrox, or any other gas, both have the same depth limitations
Question 8. Diving with Enriched air nitrox reduces the exposure to nitrogen; therefore, you can't get decompression
sickness while diving with Enriched air nitrox.
☐ True ☒ False
Question 9. The maximum limit ppO2 and maximum emergency limit ppO2 for recreational Enriched air nitrox dives
are:
a. 1..6
b. 1..6
c. 1..4
d. 1..4
Question 10. Until such time, as researchers can’t verify impact, if any, Enriched air nitrox has on narcosis, you should
not count on experiencing less narcosis when diving with enriched air nitrox than compressed air at
comparable depths.
☒ True ☐ False
Question 11. Can we use Enriched air Nitrox to reduce the risk of Decompression Sickness?
☐ True ☒ False
Question 12. What measures can be done to add an additional safety margin while diving with Enriched air nitrox?
By using the no-decompression limits of a dive computer or air tables.
