All of the following are results of unbalanced reeving of the hook block EXCEPT:

Unbalanced reeving of the hook block can lead to several issues that affect the longevity and performance of lifting equipment. One key insight here is that when the reeving is unbalanced, it can cause uneven wear and stress on different components of the rigging system.

When considering the options, wear on the sheaves occurs because unbalanced reeving leads to uneven loading on the pulleys, which can cause excessive friction and wear over time. Torque on the boom is also a result of unbalanced loading, as the forces acting on the system can create twisting moments that affect the structural integrity of the boom. Wear on the wire rope is similarly a result of unbalanced forces that can lead to specific sections of the rope experiencing more strain, increasing the risk of damage.

In contrast, wear on the hook is not typically a result of unbalanced reeving. The hook is primarily designed to bear the load and transfer it without experiencing significant wear relative to the other components. The nature of its design allows it to manage loads without being directly impacted by the reeving arrangement. Thus, it is less prone to wear due to an unbalanced reeving setup compared to the sheaves, boom, and wire rope.