AWS Filler Metals & Consumables 4

Question 1

Which AWS filler metal classification prefix indicates a bare solid wire electrode for GMAW?

Accepted Answer

ER

Answer

The 'ER' prefix denotes a wire that can be used as either an electrode or a rod, which is standard for GMAW solid wires.

Question 2

What does the 'G' suffix in an E71T-1C-H8 flux-cored wire classification indicate?

Accepted Answer

No specific requirements beyond the base classification

Answer

The 'G' suffix means the wire meets no requirements beyond those already specified in the base classification.

Question 3

A welding procedure requires a filler metal with a minimum tensile strength of 80,000 psi for carbon steel SMAW. Which electrode class is the minimum requirement?

Accepted Answer

E8018

Answer

The 'E80XX' series designates a minimum tensile strength of 80,000 psi; E8018 meets this requirement.

Question 4

What is the primary purpose of lithium fluoride in a SAW flux?

Accepted Answer

Improve slag detachability and reduce fluorine fumes

Answer

Lithium fluoride in SAW fluxes improves slag removal and helps reduce the overall fluorine fume generation compared to calcium fluoride alone.

Question 5

When welding austenitic stainless steel, which filler metal composition is used to prevent weld solidification cracking by promoting a small amount of ferrite?

Accepted Answer

Dual-phase with 3–8 FN ferrite number

Answer

A ferrite number of 3–8 FN in the weld deposit provides enough ferrite to dissolve sulfur and phosphorus, preventing hot cracking.

AWS Practice Test

AWS Practice Test

AWS Filler Metals & Consumables 4