What does the red "WARNING" RF sign indicate?

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Multiple Choice

What does the red "WARNING" RF sign indicate?

Explanation:
Red WARNING RF signs show that the area has radio frequency exposure above the maximum permissible exposure (MPE) limits. This signals a real RF hazard, so access is allowed only with protective measures in place to reduce exposure—such as shielding, access controls, monitoring, and any required PPE. Training is important, but by itself isn’t the full requirement here; the sign emphasizes active protection before entering. Explanations claiming there’s no hazard or that exposure is safe don’t fit a warning notice.

Red WARNING RF signs show that the area has radio frequency exposure above the maximum permissible exposure (MPE) limits. This signals a real RF hazard, so access is allowed only with protective measures in place to reduce exposure—such as shielding, access controls, monitoring, and any required PPE. Training is important, but by itself isn’t the full requirement here; the sign emphasizes active protection before entering. Explanations claiming there’s no hazard or that exposure is safe don’t fit a warning notice.

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