Which of the following is NOT a type of wire rope sling?

The choice of "Transport Sling" as the answer is based on the categorization of wire rope slings. Wire rope slings are typically designed for specific lifting applications and are classified into several types based on their configuration and intended use.

The single leg sling and multi-leg sling are both commonly used types of wire rope slings. A single leg sling consists of one length of wire rope, while a multi-leg sling includes multiple legs that can distribute the load more effectively. Round slings, although made from a different material, are not classified as wire rope slings; however, they are included here for comparison purposes.

The term "Transport Sling" is not a recognized category within the types of wire rope slings. It generally does not refer to a standard lifting sling configuration and lacks the specific design intended for lifting operations that other types possess. Therefore, identifying "Transport Sling" emphasizes the importance of understanding the designated uses and classifications for lifting equipment in the rigger's toolkit.