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 gasshielded stainless steel FCAW electrode?
Answer 1: E71T1 Answer 2: E70T3 Answer 3: E316LT1 Answer 4: E70C3 Correct Answer: E316LT1 



Question 3: Using a blended shielding gas in an FCAW electrode designed to run on 100% CO_{2}:
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% CO_{2} 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% CO_{2} 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 E70T1.
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 lowalloy 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 E71T1M 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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