What is the minimum operating distance for a mobile radio transmitter near electric blasting operations?

• A. 10 feet
• B. 20 feet
• C. 66 feet
• D. 100 feet

Answer: (C)

The minimum operating distance for a mobile radio transmitter near electric blasting operations is set at 66 feet to ensure safety during blasting activities. This distance is critical because electronic devices, including mobile radios, can create electromagnetic interference which may inadvertently initiate blasting caps or explosives.

Establishing a clear buffer zone of 66 feet helps minimize the risk of accidental detonation during blasting operations. It ensures that the influence of radio frequency signals on the blasting circuit is reduced, maintaining a safe working environment. This standard is in place to align with safety regulations and best practices in the mining and explosives industry, thereby protecting workers and equipment involved in blasting operations.