A ___________ acts as a one-way check valve, allowing only the desired type of current to flow into the welding circuit.

Discontinuities are interruptions of the typical structure of a weldment, such as a lack of homogeneity in the mechanical, metallurgical or physical characteristics of the material or weldment that makes the weld rejectable.

Correctly identify the part indicated by the arrow in the figure below.

_____________ are used by the power company to step up the voltage for long distance transmission.

Welds can fail due to:

Increasing the frequency of the AC welding output will:

The power output of a single inverter GTAW welder would be:

According to the American Society of Mechanical Engineers (ASME), the highest percentage of welding defect causes are:

An increase in dust and dirt within the welding transformer will effectively its duty cycle.

Use extreme caution when working with high frequency circuits because: