Which hand signal indicates air problems?

• A. air problems
• B. vision problem
• C. hazardous atmosphere
• D. they are okay

Answer: (A)

In these hand signals, each gesture communicates a specific safety condition so the team can respond quickly without spoken words. The signal for air problems specifically alerts everyone that the respirator air supply is compromised—things like low air, out of air, or a regulator issue. That means the person may be running out of breathable air, and the team should stop advancing, check the air gauge or regulator, and retreat to fresh air or switch to a backup supply.

That’s why this signal is the best choice here: it directly flags a breathing-safety issue, which is the most urgent concern in a hazardous environment. The other signals point to different conditions—vision problems signal visibility or sight issues, a hazardous atmosphere indicates toxic or dangerous atmospheric conditions, and they are okay means there’s no problem. Those signals are useful, but they don’t convey a problem with the air supply like the air problems signal does.