How close to a mantrip may a powder trip be operated?

The correct choice establishes a critical safety protocol in mining operations regarding the use of mantrips and powder trips. A powder trip, which is used to initiate the detonation of explosives, must be operated with sufficient time between its use and the passage of a mantrip to ensure the safety of miners and minimize the risk of accidents.

Choosing 5 minutes as the required interval is based on safety regulations designed to provide ample time for any potential hazards or shockwaves from the detonation to dissipate before personnel transit through that area. This safety period helps ensure that the area is clear from explosive effects, allowing for safe movement of workers and equipment.

In other options, shorter intervals could increase the risk of accidents occurring, as they may not allow sufficient time for safety inspections or to ensure that the area has been properly cleared after a detonation. The choice of 5 minutes balances safety with operational efficiency, ensuring that necessary precautions are upheld without excessively delaying the workflow.