Which inspection tool helps evaluate the quality of the driven rivet head?

The correct answer is the rivet gauge because this tool is specifically designed to measure the dimensions of rivet heads, including their diameter and height. The rivet gauge allows mechanics to determine if the rivet head is formed correctly and meets the specifications required for structural integrity. This is crucial in aerospace applications where the strength and quality of riveted joints can significantly affect safety and performance.

The other tools mentioned, while useful in various measuring applications, do not specifically assess the quality of rivet heads. A micrometer is typically used for measuring very small distances or thicknesses of materials but is not tailored for evaluating rivet heads. Gap inspection shims are used to measure gaps between surfaces rather than the quality of rivet formation. Similarly, a thickness gauge measures the thickness of materials and is not designed for assessing rivet geometries. Therefore, the rivet gauge is the most appropriate and specialized tool for evaluating driven rivet heads in aerospace assembly.