PADI Divemaster Certification Practice Exam

What is one way to avoid carbon monoxide toxicity while diving?

1. Choosing shallower depths

2. Using reputable fill stations

3. Avoiding night dives

4. Staying close to shore

The correct answer is: Using reputable fill stations

Using reputable fill stations is a critical way to avoid carbon monoxide toxicity while diving. Carbon monoxide (CO) is a colorless, odorless gas that can be present in poorly maintained compressors or fill stations that do not follow proper safety procedures. When air tanks are filled with contaminated air, divers can inhale carbon monoxide during their dives, leading to serious health risks. By ensuring that you use fill stations that have a good reputation and adhere to safety standards, you significantly reduce the risk of CO exposure. Reputable fill stations typically have well-maintained equipment and adhere to proper ventilation and filtration processes, which help prevent contamination of the air being provided. The other options do not specifically address the risk of carbon monoxide. Shallow depths, avoiding night dives, and staying close to shore are generally related to other aspects of diving safety, such as visibility, physical exertion, or emergency response, rather than directly preventing CO toxicity. Thus, using reliable sources for filling tanks is the most effective strategy for minimizing this specific risk.