A maintenance action is required when the mast moment indicator exceeds what percentage?

A maintenance action is required when the mast moment indicator exceeds what percentage?

• A. 50%
• B. 65%
• C. 77%
• D. 85%

Answer: (C)

A maintenance action is required when the mast moment indicator exceeds 77%. This threshold is critical because it indicates that the lifting system is operating at a level where stresses on the mast structure are becoming potentially unsafe. The mast moment indicator is designed to reflect the load on the mast in relation to its stability and structural integrity. Exceeding the 77% threshold suggests that the lifting system is close to its maximum rated capacity, which can lead to instability or failure if not addressed. By requiring maintenance at this level, it ensures that any potential issues can be mitigated before they lead to more significant problems, such as equipment failure or safety hazards. Regular checks and maintenance actions help to ensure the longevity of the equipment and the safety of personnel operating the lifting system.

A maintenance action is required when the mast moment indicator exceeds 77%. This threshold is critical because it indicates that the lifting system is operating at a level where stresses on the mast structure are becoming potentially unsafe. The mast moment indicator is designed to reflect the load on the mast in relation to its stability and structural integrity.

Exceeding the 77% threshold suggests that the lifting system is close to its maximum rated capacity, which can lead to instability or failure if not addressed. By requiring maintenance at this level, it ensures that any potential issues can be mitigated before they lead to more significant problems, such as equipment failure or safety hazards. Regular checks and maintenance actions help to ensure the longevity of the equipment and the safety of personnel operating the lifting system.