What type of groundbed is installed 100 meters from the protected area?

The correct answer, a conventional groundbed, is appropriate for situations where the installation is located at a significant distance, such as 100 meters, from the protected area. Conventional groundbeds consist of an array of anodes that are typically buried in a horizontal configuration to provide effective corrosion protection for structures like pipelines and tanks.

This type of groundbed is designed to achieve an adequate surface area to generate sufficient current to protect the cathodically protected structure over a larger area and is often utilized in locations where space allows for horizontal or parallel anode installations. The distance of 100 meters implies that a conventional groundbed, which can cover more area effectively, is likely to be more efficient than other types that might not be designed for such spacing.

Other options may involve configurations that are less suited for long-distance protection or may require more complex installation procedures. A deep anode groundbed typically requires deeper installations, which may not be feasible or effective over that distance. Shallow vertical groundbeds, as the name suggests, are also less effective for long extensions, and distributed anode groundbeds may be designed for more confined spaces rather than larger distances.