AWS Filler Metals & Consumables 5

Question 1

An E6010 electrode is preferred over E6013 for pipeline root passes primarily because it:

Accepted Answer

Penetrates through mill scale and contamination with a stiff arc

Answer

E6010 uses a high-cellulose sodium coating that produces a forceful, digging arc capable of penetrating contaminated or tight-fit root gaps.

Question 2

What is the maximum allowable moisture content for low-hydrogen SMAW electrodes stored out of the original hermetically sealed container, per AWS D1.1?

Accepted Answer

They must be used within 4 hours or returned to oven at 250–300°F

Answer

AWS D1.1 requires low-hydrogen electrodes exposed to atmosphere to be used within 4 hours or reconditioned in a holding oven at 250–300°F (121–149°C).

Question 3

Which AWS A5 specification covers filler metals for brazing?

Accepted Answer

AWS A5.8

Answer

AWS A5.8 covers filler metals for brazing and braze welding, including silver, copper, and aluminum-based alloys.

Question 4

A flux-cored wire marked 'E71T-8' is intended for use with:

Accepted Answer

No external shielding gas (self-shielded)

Answer

The 'T-8' designation in AWS A5.20 identifies a self-shielded flux-cored electrode that generates its own shielding from the flux core.

Question 5

When selecting a filler metal for welding 4130 chromoly steel in aerospace applications, the H4 diffusible hydrogen designator means the weld metal hydrogen content must not exceed:

Accepted Answer

4 mL per 100 g of weld metal

Answer

The H4 suffix per AWS A4.3 limits diffusible hydrogen to a maximum of 4 mL per 100 g of deposited weld metal.

AWS Practice Test

AWS Practice Test

AWS Filler Metals & Consumables 5