What indicates proper functioning of the support blocks?

The proper functioning of the support blocks is indicated by the stable tension in the pendant cable. When the tension is stable, it suggests that the support blocks are effectively maintaining the required load and are aligned properly to transfer the forces through the pendant cable without any excessive movement or slippage. This stability ensures that the system is operating safely and efficiently, reducing the risk of failure.

Other options may relate to different aspects of the system's overall performance. For instance, visual inspection for wear is important for regular maintenance, but it doesn't directly confirm that the support blocks are functioning correctly at that moment. A successful cable pull test mainly assesses the strength and integrity of the cable rather than the support blocks themselves. Lastly, the absence of leaks in hydraulic components is crucial for hydraulic systems but does not provide information on the condition or performance of support blocks specifically.