What activity must be performed at least once per shift in large Class A mines?

• A. Emergency drills
• B. All active working places visited
• C. Safety training
• D. Equipment maintenance

Answer: (B)

A key safety practice in large Class A mines is that a supervisor visits all active working places at least once per shift to inspect conditions and reinforce safety. This direct walk-through ensures that hazards, ventilation and gas monitoring, barricades, housekeeping, and equipment status are checked across every area while work is ongoing. By seeing each active place personally, the supervisor can identify new or changing risks, verify that safety controls are in place, communicate with workers, and coordinate immediate corrective actions before issues escalate.

Emergency drills, safety training, and routine equipment maintenance are important, but they serve different purposes and aren’t the per-shift activity required to be conducted across all active areas.