which tool is used to measure the thickness of a brake rotor? select one: a. vernier caliper b. disc brake…

Brief Explanations:

A disc brake rotor micrometer is specifically designed for measuring the thickness of brake rotors. A vernier caliper can measure various dimensions but is not specialized for this task. A dial indicator measures small linear displacements or angular deflections, not thickness. A depth micrometer measures depths, not the thickness of a flat - like brake rotor surface.

Answer:

B. Disc brake rotor micrometer