PADI Divemaster Certification Practice Exam

What is the primary symptom of carbon monoxide exposure while diving?

1. Confusion

2. Increased alertness

3. Enhanced vision

4. Improved breathing

The correct answer is: Confusion

The primary symptom of carbon monoxide exposure while diving is confusion. Carbon monoxide is a colorless, odorless gas that can interfere with the blood's ability to transport oxygen, leading to hypoxia. As the brain becomes deprived of oxygen, cognitive functions deteriorate, resulting in symptoms such as confusion, dizziness, and impaired judgment. This state of confusion can be especially dangerous underwater, where clear thinking and decision-making are critical for safety. The other symptoms listed, such as increased alertness, enhanced vision, and improved breathing, do not typically accompany carbon monoxide exposure and could create a dangerous illusion of well-being that may lead divers to underestimate the severity of the situation. Recognizing confusion as a key indicator of potential carbon monoxide exposure is vital for divers to respond quickly and appropriately, ensuring their safety and that of their dive team.