What is the standard blasting signal recommended by WCB?

• A. 5 short blasts
• B. 10 short blasts
• C. 12 short blasts on an air horn
• D. Continuous horn for 2 minutes

Answer: (C)

The standard blasting signal recommended by the Workers' Compensation Board (WCB) is 12 short blasts on an air horn. This specific signal is recognized in mining and construction industries for indicating that a blasting operation is about to take place. The use of 12 short blasts is critical because it clearly communicates to all personnel in the vicinity that an imminent hazard is present due to the upcoming blast.

Additionally, this signal helps ensure the safety of workers by providing a consistent and recognizable alert that can be heard over ambient noise typical in mining environments. Other potential choices might fall short in terms of clarity or standardization, which could lead to confusion or miscommunication regarding blasting activities. Thus, adhering to the WCB's recommended signal is essential for maintaining safety protocols and protecting workers on-site.