Which piece of equipment should be used against the face of an embankment or bluff while moving forward?

Using a shovel against the face of an embankment or bluff while moving forward allows for increased precision and control in the excavation or grading process. A shovel is designed for manual operation, which enables the operator to make adjustments based on the specific contours and conditions of the embankment. This tool is particularly effective in situations where accuracy in shaping or removing soil is necessary, as it allows for careful handling of the material without the larger, less precise movements that mechanized equipment can create.

In contrast, an excavator and a compactor, while powerful and suited for bulk material handling and soil consolidation respectively, might not provide the level of finesse required when working directly against steep faces. A dump truck is typically used for transporting materials rather than manipulating them, making it unsuitable in this scenario. Therefore, the shovel stands out as the most appropriate equipment in this context, given its ability to provide effective, accurate work directly on the embankment face.