What reading on the Federal gauge indicates that it is zeroed and can be used for measurement?

In the context of measuring with a Federal gauge, a reading of .000 indicates that the gauge is properly zeroed. This is crucial in precision measurement because it establishes a baseline from which all subsequent measurements can be taken. When a gauge reads .000, it means that no additional distance is being recorded, thus allowing for accurate assessments of the parts being measured.

Choosing any of the other readings, such as .100, .050, or 1.000, would imply that the gauge is not zeroed, potentially leading to inaccurate measurements. In precision work, particularly in aerospace assembly, it’s essential to start with a gauge that has been calibrated correctly to ensure that the measurements taken during assembly or inspection are reliable.

Thus, a reading of .000 confirms that the gauge is not showing any error or displacement, ensuring the accuracy needed in aerospace applications.