What equipment features are necessary for telescopic booms concerning rated capacity?

The correct choice revolves around the relationship between the rated capacity of telescopic booms and boom length. Rated capacity is indeed dependent on various factors, including the boom length; however, the statement indicates that rated capacity is independent of boom length, which accurately reflects the standardization used in equipment ratings.

In practice, rated capacity charts for telescopic booms provide specific load limits based on the boom's configuration, including extended length and load radius. These capacities are determined under specified conditions, meaning that while the boom length does affect the capacity, the rated capacity itself is assessed based on the design and engineering of the equipment rather than merely being tied to the boom's length at any given moment.

The other features mentioned in the choices do not align with the operational standards or safety requirements for telescopic booms. For instance, a fixed boom length can limit the functionality of the equipment, and using telescopic booms solely for light loads wouldn't reflect their versatility. Additionally, while a built-in weight scale could enhance safety and operational awareness, it is not a required feature for the rated capacity determinations as outlined in regulations and standards for hoisting equipment. Thus, understanding that rated capacity can be evaluated independently from boom length situates the correct answer within the broader operational