What type of gauge would you use to measure the clearance between moving parts?

Using a feeler gauge is the most suitable choice for measuring clearance between moving parts due to its design, which consists of a set of thin, precisely calibrated metal blades or strips. These strips come in various thicknesses and can easily fit into tight spaces, allowing an accurate assessment of gaps or clearances between components. This is crucial in applications where precise alignment and spacing are necessary for optimal performance, such as in engines or machinery.

The other options serve specific purposes that do not align with measuring clearance effectively. An inside micrometer is primarily intended for measuring internal diameters and would not be useful in determining the gap between moving parts. A taper gauge is designed to measure the angle of taper on surfaces rather than gaps. A depth gauge is used for measuring the depth of holes or recesses, which does not apply to measuring clearances between moving parts. Therefore, the feeler gauge stands out as the appropriate tool for this task.