What devices should be provided to prevent a rail car from moving?

The correct answer highlights the importance of using multiple types of devices to effectively prevent a rail car from moving. Stopblocks, chains, and clevises each play a vital role in ensuring safety within a mining operation or rail transport environment.

Stopblocks are physical barriers that can halt the movement of rail cars, providing a fail-safe mechanism against unintended rolling. Their presence is crucial in areas where train cars are loaded or unloaded, as they provide immediate resistance.

Chains and clevises function as additional safety measures. Chains can secure the rail car to prevent it from rolling, especially on inclines or uneven surfaces, while clevises allow for a secure attachment point to the rail car, enhancing stability and preventing movement.

By utilizing a combination of these devices, operators can create a robust system of safety that accounts for various operational scenarios and minimizes the risk of accidents. This multi-faceted approach is essential to meet safety regulations and ensure the well-being of personnel working in and around rail transport areas in the mining industry.