1 | P a g e | © copyright 2024/2025 | Grade A+
SDI Computer Nitrox TDI SDI Computer
Nitrox eLearning Chapter Questions
and Answers | Latest Update
2024/2025
True or False. Oxygen Enriched Air is a term some divers use to refer to Nitrox.
✓ ~~> True
The air we normally breathe consists primarily of:
✓ ~~> Nitrogen and Oxygen
A mixture of nitrogen and oxygen in which the percentage of oxygen is
greater than that found in air is generally called:
✓ ~~> Enriched Air, Enriched Air Nitrox, Nitrox, Etc.
The person who creates the Nitrox used to fill scuba cylinders is referred to as
a:
✓ ~~> Blender
Which of the following is not a Nitrox mixture? EAN24, EAN21, EAN40
✓ ~~> EAN21
The primary benefits of using Nitrox include:
Master01 | September, 2024/2025 | Latest update
, 2 | P a g e | © copyright 2024/2025 | Grade A+
✓ ~~> Longer bottom times and shorter surface intervals
During any 24-hour period, you can be exposed to a Nitrox mixture at its
Maximum Operating Depth (MOD) for up to:
✓ ~~> 150 Minutes or 2.5 hours
True or False. Dive computers work by monitoring the presences of so-called
'silent bubbles using ultrasound.
✓ ~~> False
What may happen 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 decompression sickness and
your dive computer may require you to make a series of
decompression stops
A decompression stop is:
✓ ~~> Pausing at a fixed depth for a specified period of time to allow
excess nitrogen to exit you body more slowly
To properly engage in decompression diving requires:
✓ ~~> Specialized training, Additional equipment, and Topside support
Master01 | September, 2024/2025 | Latest update
SDI Computer Nitrox TDI SDI Computer
Nitrox eLearning Chapter Questions
and Answers | Latest Update
2024/2025
True or False. Oxygen Enriched Air is a term some divers use to refer to Nitrox.
✓ ~~> True
The air we normally breathe consists primarily of:
✓ ~~> Nitrogen and Oxygen
A mixture of nitrogen and oxygen in which the percentage of oxygen is
greater than that found in air is generally called:
✓ ~~> Enriched Air, Enriched Air Nitrox, Nitrox, Etc.
The person who creates the Nitrox used to fill scuba cylinders is referred to as
a:
✓ ~~> Blender
Which of the following is not a Nitrox mixture? EAN24, EAN21, EAN40
✓ ~~> EAN21
The primary benefits of using Nitrox include:
Master01 | September, 2024/2025 | Latest update
, 2 | P a g e | © copyright 2024/2025 | Grade A+
✓ ~~> Longer bottom times and shorter surface intervals
During any 24-hour period, you can be exposed to a Nitrox mixture at its
Maximum Operating Depth (MOD) for up to:
✓ ~~> 150 Minutes or 2.5 hours
True or False. Dive computers work by monitoring the presences of so-called
'silent bubbles using ultrasound.
✓ ~~> False
What may happen 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 decompression sickness and
your dive computer may require you to make a series of
decompression stops
A decompression stop is:
✓ ~~> Pausing at a fixed depth for a specified period of time to allow
excess nitrogen to exit you body more slowly
To properly engage in decompression diving requires:
✓ ~~> Specialized training, Additional equipment, and Topside support
Master01 | September, 2024/2025 | Latest update
