When inspecting a chain, the links should be able to freely rotate from side to side approximately ___ degrees without binding.

The correct answer is associated with the standard practice of inspecting chain links during rigging inspections. When evaluating a chain, it's essential to ensure that the links can rotate freely without any binding, which indicates that the chain's movement is not impeded. The specified degree of rotation is crucial for the effective functioning of the chain during lifting or hoisting tasks.

Having the ability to rotate approximately 90 degrees allows for sufficient movement and reduces the risk of binding or jamming, which can lead to accidents or chain failure. This flexibility is vital in ensuring that the load can be handled smoothly and that the equipment operates safely under varying conditions.

The other values represent rotations that may be too limited for effective operation. For example, 45 degrees does not provide enough mobility, possibly increasing the risk of binding, while 120 degrees may exceed the normal range of flex in a chain link, potentially leading to overstress and damaging the links. Therefore, 90 degrees is the ideal standard for ensuring safety and efficiency in rigging operations.