The warning provision for hoistman is required in shafts exceeding what depth?

• A. 100 meters
• B. 50 meters
• C. 150 meters
• D. 200 meters

Answer: (A)

The warning provision for the hoistman is tied to the depth of the shaft because deeper shafts bring greater risks and more complex operations. Once a shaft exceeds 100 meters, the potential for longer travel times, increased stopping distance, and higher energy in the hoisting system means that immediate, reliable communication and warning are essential. A warning provision helps the hoistman know when movement is about to start or stop, alerts nearby workers, and reduces the chance of injuries from unexpected cage movements or miscommunication.

At depths up to 100 meters, the risk is lower and standard controls are typically considered sufficient, so the explicit warning provision is not required unless otherwise specified by local regulations.