Which signal corresponds to both boom up and hoist movement in some configurations?

• A. The signal for boom up and lower hoist
• B. The signal for hoist
• C. The signal for lower boom
• D. The signal for move slow

Answer: (A)

In crane signaling, some commands are mapped to more than one control so actions can be coordinated. In certain configurations, a single signal can drive both the boom movement and the hoist at the same time, allowing you to raise the boom while adjusting the load height.

The signal that corresponds to both boom up and lower hoist is the one that, in those configurations, triggers those two actions simultaneously. This mapping is configuration-specific, so it’s important to follow the crane’s signal chart and site procedures to know when this dual-action signal applies.

The other signals are more limited: a signal for the hoist moves only the hoist; a signal for lowering the boom affects just the boom; a signal to move slowly controls speed, not the direction of boom or hoist.