FCAW: Electrodes & Shielding Gases: Part 2 of 3 (WDEQ25)

The learner will demonstrate an understanding of FCAW electrodes and shielding gases.

Author - David Crawford


Question 1:

Which letter addition does not belong when referring to stainless steel FCAW electrodes?

Answer 1:

L

Answer 2:

H

Answer 3:

Cb

Answer 4:

D


Correct Answer:

D


Question 2:

Which electrode is a gas-shielded stainless steel FCAW electrode?

Answer 1:

E71T-1

Answer 2:

E70T-3

Answer 3:

E316LT-1

Answer 4:

E70C-3


Correct Answer:

E316LT-1


Question 3:

Using a blended shielding gas in an FCAW electrode designed to run on 100% CO2:

Answer 1:

Increases tensile strength but decreases ductility.

Answer 2:

Decreases tensile strength but increases ductility.


Correct Answer:

Increases tensile strength but decreases ductility.


Question 4:

Using 100% CO2 shielding gas for an FCAW electrode designed to run on a mixed shielding gas:

Answer 1:

Increases tensile strength.

Answer 2:

Decreases tensile strength.


Correct Answer:

Decreases tensile strength.


Question 5:

FCAW electrodes designed to run on 100% CO2 have more deoxidizers added.

Answer 1:

True

Answer 2:

False


Correct Answer:

True


Question 6:

The highest tensile strength obtained in FCAW electrodes is 70,000, as in E70T-1.

Answer 1:

True

Answer 2:

False


Correct Answer:

False


Question 7:

What is generally the largest diameter FCAW electrode?

Answer 1:

 inch

Answer 2:

 inch

Answer 3:

 inch

Answer 4:

 inch

Answer 5:

 inch


Correct Answer:

 inch


Question 8:

What is generally the smallest diameter FCAW electrode?

Answer 1:

0.030 inch

Answer 2:

0.035 inch

Answer 3:

0.045 inch

Answer 4:

0.052 inch


Correct Answer:

0.035 inch


Question 9:

Which letter addition does not belong when referring to FCAW low-alloy electrodes?

Answer 1:

Ni

Answer 2:

W

Answer 3:

X

Answer 4:

D


Correct Answer:

X


Question 10:

What does the "M" added to the E71T-1M classification mean?

Answer 1:

No shielding gas is required.

Answer 2:

Only carbon dioxide shielding gas is required.

Answer 3:

Only argon shielding gas is required.

Answer 4:

A mixed shielding gas of argon and carbon dioxide is required.


Correct Answer:

A mixed shielding gas of argon and carbon dioxide is required.


Question 11:

The last number "-1, -3, -4, -5" in a stainless steel electrode designates:

Answer 1:

Alloying content

Answer 2:

Shielding gas requirement

Answer 3:

Diffusible hydrogen

Answer 4:

Allowable weld position


Correct Answer:

Shielding gas requirement


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