National Commission for the Certification of Crane Operators (NCCCO) Mobile Crane Practice Exam

When is it okay to temporarily bypass a crane's overload warning system?

1. When a supervisor tells you to

2. When the load to be lifted exceeds the capacity in the chart

3. Never

4. During assembly/disassembly operations

The correct answer is: During assembly/disassembly operations

Temporarily bypassing a crane's overload warning system during assembly or disassembly operations is permissible under certain controlled conditions. This exception is typically made to allow for operations where the crane is not used to lift loads in the typical manner but rather to align components or to perform tasks where the overload warning system would unnecessarily halt operations due to the nature of the assembly. In these scenarios, the crane may be tasked with lifting parts that are temporarily unrigged or have no defined weight due to their intended configuration. Proper training, adherence to safety protocols, and the presence of qualified personnel are essential during such operations to ensure that safety is prioritized. The other choices imply practices that can lead to unsafe situations. For example, acting on a supervisor's directive without evaluating the risks may lead to dangerous overloads; attempting to lift loads above the crane's capacity disregards established safety measures, and stating that it’s never acceptable overlooks the specific situation in controlled assembly or disassembly contexts where careful precautions are taken.