What are some common hand signals used in crane operations?

The correct answer reflects common hand signals used in crane operations that are essential for clear communication between the operator and the signal person. The signals "raise load" and "lower load" are fundamental actions that need to be conveyed effectively. The inclusion of "move left/right" is important as horizontal movement is a critical aspect of crane operations, ensuring that loads are positioned accurately.

The signal to "stop" is equally necessary, as it allows for immediate cessation of movement, which can prevent accidents and ensure safety on the job site. These standardized signals help ensure that both the crane operator and the signal person have a mutual understanding for safe operations, reducing the risk of mishaps during lifting activities.

Other options may include actions that are not typically standardized or might be ambiguous in the context of crane operations, which may lead to confusion or misunderstandings on-site. Therefore, the selected answer effectively embodies the key elements of safe and efficient communication in crane operations.