01- What is Nitrox 32?

A mix of 32% nitrogen and 68% oxygen.
A mix of 32% oxygen and 68% nitrogen.
A mix of 32% nitrogen + 32% helium and 32% oxygen.

02- What's the benefit of Nitrox?

We can dive longer time or it reduces the risk of decompression sickness.
Our body can saturate more nitrogen.
We can dive deeper but for a shorter time.

03- Which factor determines the maximum depth for the use of Nitrox?

The oxygen partial pressure must not exceed 1,4 bar.
The nitrogen partial pressure must not exceed 1,4 bar.
The oxygen partial pressure must not exceed 1,8 bar.

04- How to calculate the partial pressure of a gaz?

Divide the pressure by the gaz percentage.
Multiply the pressure by the gaz percentage.
Substract the gaz percentage to the pressure.

05- If I expose myself to a too high pressure of oxygen...

I expose myself to the nitrogen toxicity.
I will become younger.
I expose myself to the oxygen toxicity

06- What are the signs and symptoms of the oxygen toxicity for scuba divers?

Convulsions and unconsciousness.
Localized pain and numbness.
Pain in the ears and in the sinuses.

07- What to do if you have the first symptom of oxygen toxicity?

This is the sign that I can dive even deeper.
I wait that my convulsions calm down.
This is the sign that I must immediatly ascend toward shallower waters.

08- What's the maximum depth allowed for Nitrox 36?

24,9 meters.
28,9 meters.
32,9 meters.

09- Which nitrox to use to dive till 40m depth?

Nitrox 25.
Nitrox 28.
Nitrox 32.

10- How to know the nitrox percentage in a scuba tank?

By testing if the scuba tank floats in the water.
By using a nitrogen analyser.
By using an oxygen analyser.