Exam 11: Gas Metal Arc Welding

Short electrode stickout gives a _____ weld and a long stickout results in a ______ weld.

A weld that is high and has little or no fusion is too "cold." To correct this, ____.

Which of the following is true of short-circuiting arc metal transfer in the overhead position?

____________________ is the chief determinant of how effective a gas is for arc shielding.

Shielding gases in the gas metal arc process are used primarily to protect the molten metal from oxidation and ____________________.

At any one voltage setting, ____ amperage is required to melt the wire the ____ it is fed.

Which of the following is true of mill scale?

Which of the following gases is the least dense?

Mixtures of argon with less than ____ percent carbon dioxide may not have enough arc voltage to give desired results.

____ provide the necessary shielding because they do not form compounds with any other substance.

Explain how high gas flow rates can lead to contamination.

Why should wire not be discarded on the floor?

The more cost efficient welders can be, the more ___________ they and their companies become.

Because of the constant-potential power supply, the welding current will change as the distance between the ____________________ and the work changes.

Too light of a feed roller pressure can _______________.

The ____ the density of a gas, the ____ will be the flow rate required for equal arc protection.

When used as pure gases for welding ferrous metals, ____ may produce an erratic arc action, promote undercutting, and result in other flaws.

What are the basic components of a GMA welding station?

Filler metals and fluxes usually have ____________________ added to them so that the adverse effects of the mill scale are reduced or eliminated.

____ is increased and ____ is decreased as the electrode extension is shortened.