Which of the following is NOT a primary component of an Eddy Current Testing system?

In an Eddy Current Testing system, the primary components typically include the probe, the eddy current instrument, and the test coil. These parts work together to generate and measure the eddy currents induced in the test material.

The probe is crucial as it contains the test coil, which produces the alternating magnetic field necessary for inducing eddy currents in the conductive material being tested. The eddy current instrument processes the signals received from the probe, providing qualitative or quantitative data regarding the material's properties or any defects present.

The oscillating pump, however, is not a part of the essential components of Eddy Current Testing. It does not contribute to the generation or measurement of eddy currents, which are fundamental to this non-destructive testing process. Hence, identifying the oscillating pump as not being a primary component reflects an understanding of the specific technological elements that constitute an Eddy Current Testing system.