Which color is used to indicate moving parts hazards?

• A. Red
• B. Orange
• C. Blue
• D. Green

Answer: (B)

Moving parts hazards are signaled with orange because that color is reserved for mechanical dangers and is highly visible on machinery. The bright orange stands out against metal and guards, signaling you to keep hands, clothing, and tools away when parts could move, helping prevent pinch, crush, or entanglement injuries. Other colors have different meanings: red is for emergency stops or fire-related cues, blue indicates mandatory actions or PPE requirements, and green marks safe conditions or safety equipment. So orange is the best fit for warning about moving parts.