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The four basic welding positions are

is caused by insufficient gas flow to the welding torch

The cylinder valve is cracked to remove debris (dust, chips) lodged in the outlet nozzle

When welding with DCEP, electron flow from the _______ to the _______

_____ arc welding consists of a spool of hollow wire filled with flux that is fed through the gun. This process does not require external shielding gas. It is commonly used to weld carbon, low-alloy and stainless steels, and cast iron.

The ______ welding process does not use shielding gas to protect the weld area. In this automated process, the electrode, arc, and weld pool are submerged in a granular flux that is poured on the base metal.

determines whether current flows into the workpieces or toward the electrode in a DC circuit

a check valve/flash arrestor allows the flow of liquid or gas in one direction only