Which is NOT a factor to consider when wiring a power unit to an electrical source?

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

Dust and dirt need to be periodically removed from the following parts of a welding power source?

A given static load on a weldment will not cause failure of the weld.

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

The presence of dust and dirt within the spark gap will the voltage required to jump the gap.

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

Burn-through can result from poor joint fit-up.

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.

When open holes have been completely melted through the base metal, generally caused by too much heat or poor welding motions, it is identified as: