Which factors primarily determine how the screed reacts to achieve a smooth and uniform surface?

The correct answer focuses on the various physical parameters that directly influence the performance of the screed, an essential component in the paving process. The screed's ability to achieve a smooth and uniform surface is significantly affected by the pull of the paver, which determines how the material is consolidated and spread. Additionally, the head of material refers to the amount of asphalt mix available in front of the screed, influencing how it flows and levels properly. The angle of the screed impacts the thickness and smoothness of the asphalt layer, while the mass of the screed affects its stability and the pressure applied to the material being laid down.

Together, these factors allow for a controlled application of the asphalt mix, yielding a more efficient paving operation and enhancing the overall quality of the surface. Understanding these specific variables is crucial for the inspector to identify potential issues during the paving process and ensure that the final product meets quality standards.