True or False: Audible signals can indicate an unlimited set of instructions in crane operations.

The statement is false because while audible signals in crane operations are used to communicate specific and essential instructions, they cannot encompass an unlimited set of instructions due to the need for clarity and safety.

Audible signals, such as whistles or horns, are typically standardized and understood by the crew to signify certain actions, such as starting or stopping movement, lowering loads, or warning of potential hazards. Each signal must be clear and distinct to prevent confusion among operators and personnel on a job site. Complex operations with numerous simultaneous tasks require more detailed communication methods, such as hand signals or radio communication, to ensure safety and precision.

Thus, using audible signals restricts the number of commands that can be effectively and safely conveyed, making it necessary for operators to rely on other forms of communication for more intricate instructions.