Which responsibility does NOT belong to crane operators?

The responsibility of adjusting the crane on unclear signals does not belong to crane operators because it shifts the operator's focus away from the primary task of safely operating the crane. Proper communication and clear signaling are essential for safe crane operation, and it is crucial for the signalman to provide clear and unambiguous signals. If signals are unclear, the operator’s response should be to stop operations and seek clarification rather than to attempt adjustments based on uncertain communication. This practice ensures that safety is maintained, reducing the risk of accidents that could arise from misinterpretation of signals.

In contrast, conducting a thorough pre-use check, maintaining constant communication with the signalman, and safely lifting and landing all loads are essential responsibilities of crane operators. These tasks help ensure safe operations and compliance with safety regulations, demonstrating the operator's commitment to the well-being of both the crew and the load being handled.