Welding Contractor Exam (C-60
Specialty) Questions and Correct
Answers (Verified Answers) Plus
Rationales 2025 Q&A | Instant
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1. What is the primary purpose of a welding procedure specification (WPS)?
A. To estimate project costs
B. To provide approved welding instructions
C. To schedule inspections
D. To order welding materials
Correct Answer: B
Rationale:
A Welding Procedure Specification (WPS) provides qualified instructions for
producing sound welds consistently. It specifies variables such as process, filler
metal, current, voltage, and travel speed.
2. Which welding process uses a continuously fed consumable wire electrode?
A. GTAW
B. SMAW
C. GMAW
D. Oxyfuel welding
Correct Answer: C
Rationale:
Gas Metal Arc Welding (GMAW or MIG) continuously feeds a consumable wire
electrode through the welding gun.
,3. Which welding process commonly uses a non-consumable tungsten
electrode?
A. SMAW
B. FCAW
C. GMAW
D. GTAW
Correct Answer: D
Rationale:
Gas Tungsten Arc Welding (GTAW or TIG) uses a non-consumable tungsten
electrode while filler metal is added separately when needed.
4. What does SMAW stand for?
A. Shielded Metal Arc Welding
B. Standard Metal Arc Welding
C. Shielded Mechanical Arc Welding
D. Structural Metal Alloy Welding
Correct Answer: A
Rationale:
SMAW stands for Shielded Metal Arc Welding, also called stick welding.
5. Which gas is commonly used as a shielding gas for GTAW welding of stainless
steel?
A. Oxygen
B. Argon
C. Nitrogen
D. Carbon monoxide
Correct Answer: B
,Rationale:
Argon provides excellent shielding and stable arc characteristics for TIG welding
stainless steel.
6. What is the purpose of shielding gas?
A. Increase travel speed
B. Prevent weld contamination
C. Cool the electrode
D. Reduce metal thickness
Correct Answer: B
Rationale:
Shielding gas protects the molten weld pool from atmospheric oxygen, nitrogen,
and moisture that can cause weld defects.
7. Which personal protective equipment protects the eyes from arc radiation?
A. Ear plugs
B. Safety vest
C. Welding helmet
D. Leather apron
Correct Answer: C
Rationale:
A welding helmet with the correct filter lens protects against ultraviolet, infrared,
and visible light produced during welding.
8. Which weld joint joins two pieces in the same plane?
A. Corner joint
B. Tee joint
C. Butt joint
D. Edge joint
, Correct Answer: C
Rationale:
A butt joint connects two workpieces lying in the same plane.
9. What is slag?
A. Shielding gas residue
B. Hardened flux residue
C. Base metal impurity
D. Electrode coating
Correct Answer: B
Rationale:
Slag forms from the melted flux during welding and must usually be removed
after the weld cools.
10. Which defect is caused by trapped gas in a weld?
A. Undercut
B. Cracking
C. Porosity
D. Overlap
Correct Answer: C
Rationale:
Porosity consists of gas pockets trapped in the solidifying weld metal.
11. Which electrode classification is commonly used for mild steel SMAW
welding?
A. E6010
B. ER308L
C. E4043
D. E316L
Specialty) Questions and Correct
Answers (Verified Answers) Plus
Rationales 2025 Q&A | Instant
Download PDF
1. What is the primary purpose of a welding procedure specification (WPS)?
A. To estimate project costs
B. To provide approved welding instructions
C. To schedule inspections
D. To order welding materials
Correct Answer: B
Rationale:
A Welding Procedure Specification (WPS) provides qualified instructions for
producing sound welds consistently. It specifies variables such as process, filler
metal, current, voltage, and travel speed.
2. Which welding process uses a continuously fed consumable wire electrode?
A. GTAW
B. SMAW
C. GMAW
D. Oxyfuel welding
Correct Answer: C
Rationale:
Gas Metal Arc Welding (GMAW or MIG) continuously feeds a consumable wire
electrode through the welding gun.
,3. Which welding process commonly uses a non-consumable tungsten
electrode?
A. SMAW
B. FCAW
C. GMAW
D. GTAW
Correct Answer: D
Rationale:
Gas Tungsten Arc Welding (GTAW or TIG) uses a non-consumable tungsten
electrode while filler metal is added separately when needed.
4. What does SMAW stand for?
A. Shielded Metal Arc Welding
B. Standard Metal Arc Welding
C. Shielded Mechanical Arc Welding
D. Structural Metal Alloy Welding
Correct Answer: A
Rationale:
SMAW stands for Shielded Metal Arc Welding, also called stick welding.
5. Which gas is commonly used as a shielding gas for GTAW welding of stainless
steel?
A. Oxygen
B. Argon
C. Nitrogen
D. Carbon monoxide
Correct Answer: B
,Rationale:
Argon provides excellent shielding and stable arc characteristics for TIG welding
stainless steel.
6. What is the purpose of shielding gas?
A. Increase travel speed
B. Prevent weld contamination
C. Cool the electrode
D. Reduce metal thickness
Correct Answer: B
Rationale:
Shielding gas protects the molten weld pool from atmospheric oxygen, nitrogen,
and moisture that can cause weld defects.
7. Which personal protective equipment protects the eyes from arc radiation?
A. Ear plugs
B. Safety vest
C. Welding helmet
D. Leather apron
Correct Answer: C
Rationale:
A welding helmet with the correct filter lens protects against ultraviolet, infrared,
and visible light produced during welding.
8. Which weld joint joins two pieces in the same plane?
A. Corner joint
B. Tee joint
C. Butt joint
D. Edge joint
, Correct Answer: C
Rationale:
A butt joint connects two workpieces lying in the same plane.
9. What is slag?
A. Shielding gas residue
B. Hardened flux residue
C. Base metal impurity
D. Electrode coating
Correct Answer: B
Rationale:
Slag forms from the melted flux during welding and must usually be removed
after the weld cools.
10. Which defect is caused by trapped gas in a weld?
A. Undercut
B. Cracking
C. Porosity
D. Overlap
Correct Answer: C
Rationale:
Porosity consists of gas pockets trapped in the solidifying weld metal.
11. Which electrode classification is commonly used for mild steel SMAW
welding?
A. E6010
B. ER308L
C. E4043
D. E316L
