Which of the following is a potential hazard of improper enriched air filling procedures?

When discussing the hazards of improper enriched air filling procedures, it is crucial to understand the risks associated with handling and storing enriched air. Enriched air, or nitrox, contains higher percentages of oxygen than regular air, which can significantly alter its properties and behavior under pressure.

The correct answer, which highlights the fire or explosion hazard, emphasizes the fact that increased oxygen levels can make materials more flammable. When oxygen concentration in the air rises, it can lead to combustion at lower ignition temperatures and can facilitate the burning of materials that would not normally ignite in ambient air. This poses a severe risk during the filling process if procedures are not strictly adhered to, particularly with equipment that may not be rated for higher oxygen environments.

Additionally, using incorrect techniques or equipment when filling tanks with enriched air can lead to dangerous situations. For example, using contaminated or improper tanks can introduce impurities into the air, which can present risks both in storage and underwater.

On the other hand, improved diving experience is a positive outcome related to the use of enriched air, and stating that no hazards are expected disregards the inherent risks associated with handling enriched air. Immediate descent issues typically refer to problems more directly related to diving practices rather than filling procedures. Thus, the focus on fire