Who can give operators stop or emergency stop signal?

• A. Anyone
• B. The supervisor only
• C. Only the operator
• D. Only the signal person

Answer: (A)

The key idea here is safety through immediate action. Stop signals must be acted on promptly to prevent harm, and that responsibility isn’t limited to one role. Any crew member who notices a hazard or danger around the crane should be able to signal the operator to stop, so movement can be halted right away.

Typically, a trained signal person handles standard signals during normal operations, but in an emergency or hazardous situation, you don’t wait for the “right” person to be present. The operator should stop at a clear stop signal from anyone nearby who observes danger. This is why “Anyone” is the best answer—it reflects the safety principle that stopping the crane for a hazardous condition is a collective responsibility.