What can be used to divide the aggregate sample during the quartering process?

Using a shovel or trowel is the appropriate choice for dividing an aggregate sample during the quartering process because these tools are specifically designed for handling and manipulating materials like aggregate. During quartering, the objective is to evenly divide a sample into smaller, representative portions while maintaining the integrity of the material. A shovel or trowel allows the technician to carefully take portions of the sample, ensuring that the division is consistent and that the characteristics of the original sample are preserved.

Other tools such as a scoop may not provide the same level of control and precision necessary for this process. A forklift, while useful for transporting large volumes of material, is not suited for the delicate task of dividing aggregate samples. A spreader is typically used for distributing material rather than dividing it, making it also unsuitable for this specific application. Thus, the shovel or trowel is the most effective and appropriate tool for dividing aggregate samples in the quartering process.