What is a reason load or load-moment indicators may not be reliable?

Load or load-moment indicators are essential tools that provide real-time data on the loads being handled by cranes and other lifting equipment. However, the reliability of these devices can be compromised, particularly for reasons such as the potential for malfunction or being turned off. If the device is not functioning properly—due to technical issues, wear and tear, or human error—it may provide inaccurate or misleading information about the load being handled. This can create a significant safety risk as operators might rely on faulty data, leading to potential accidents or equipment failure.

The ability of these indicators to be turned off also poses a risk; if an operator disables the device, they may engage in unsafe practices that could lead to overloading. This highlights the importance of ensuring that load indicators are consistently monitored, maintained, and verified for accuracy to ensure the safety of operations in construction and other industries where heavy lifting is involved.

The other options suggest that load indicators are always accurate, effective in all conditions, or provide precise measurements at all times, which oversimplifies the challenges and variability in real-world applications. Understanding the potential for malfunction or the risks associated with human control helps emphasize the need for diligence in using these safety devices.