AWS Certified Welder Aluminum D1 2
Practice Exam 100 Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
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1. What is the primary purpose of the AWS D1.2 Structural Welding Code—
Aluminum?
A. To provide guidelines for pressure vessel fabrication
B. To establish requirements for welding aluminum structures
C. To regulate pipeline welding procedures
D. To govern shipbuilding welding standards
Rationale: AWS D1.2 is specifically written for structural welding of aluminum
and covers design, fabrication, inspection, and repair of aluminum structures.
2. Which aluminum alloy designation indicates a heat-treatable alloy?
A. 5052
B. 5083
C. 6061
D. 3003
Rationale: The 6XXX series (like 6061) is heat-treatable, while 3XXX, 5XXX
series are non-heat-treatable.
3. What is the recommended shielding gas for GMAW welding of aluminum?
,A. 100% CO2
B. 75% Argon / 25% CO2
C. 100% Argon
D. 100% Helium
Rationale: Pure argon is the most common shielding gas for GMAW
aluminum welding, providing good arc stability and cleaning action.
4. Which welding process is typically NOT recommended for aluminum
structural welding under D1.2?
A. GMAW
B. GTAW
C. SMAW
D. All of the above are acceptable
Rationale: Under D1.2, SMAW is generally not recommended for aluminum
due to difficulty in maintaining proper arc characteristics and electrode
coating issues; GMAW and GTAW are preferred.
5. What is the minimum preheat temperature typically required for
aluminum welding under D1.2?
A. 50°F
B. 100°F
C. Preheat is generally not required unless specified
D. 200°F
Rationale: Aluminum does not typically require preheat unless the base metal
temperature is below 32°F or the section thickness requires it for specific
applications.
6. Which filler alloy is commonly used with 6061-T6 base metal?
A. ER1100
B. ER4043
, C. ER5356 only
D. ER2319
Rationale: ER4043 and ER5356 are both commonly used with 6061. ER4043
provides better crack resistance but lower strength; ER5356 provides higher
strength.
7. What is the primary function of the wire brush in aluminum welding
preparation?
A. To polish the weld surface
B. To remove the oxide layer before welding
C. To cool the weld area
D. To apply flux
Rationale: Aluminum oxide has a very high melting point (about 3700°F), so it
must be removed mechanically before welding.
8. Within how many hours must aluminum be welded after cleaning per D1.2
recommendations?
A. 4 hours
B. 8 hours
C. 24 hours
D. 48 hours
Rationale: D1.2 recommends welding within 8 hours of cleaning to prevent
re-oxidation of the aluminum surface.
9. What type of current is preferred for GTAW welding of aluminum?
A. DCEN (Direct Current Electrode Negative)
B. DCEP (Direct Current Electrode Positive)
C. AC (Alternating Current)
D. Any current type
Practice Exam 100 Questions And
Correct Answers (Verified Answers)
Plus Rationales 2026 Q&A Instant
Download Pdf
1. What is the primary purpose of the AWS D1.2 Structural Welding Code—
Aluminum?
A. To provide guidelines for pressure vessel fabrication
B. To establish requirements for welding aluminum structures
C. To regulate pipeline welding procedures
D. To govern shipbuilding welding standards
Rationale: AWS D1.2 is specifically written for structural welding of aluminum
and covers design, fabrication, inspection, and repair of aluminum structures.
2. Which aluminum alloy designation indicates a heat-treatable alloy?
A. 5052
B. 5083
C. 6061
D. 3003
Rationale: The 6XXX series (like 6061) is heat-treatable, while 3XXX, 5XXX
series are non-heat-treatable.
3. What is the recommended shielding gas for GMAW welding of aluminum?
,A. 100% CO2
B. 75% Argon / 25% CO2
C. 100% Argon
D. 100% Helium
Rationale: Pure argon is the most common shielding gas for GMAW
aluminum welding, providing good arc stability and cleaning action.
4. Which welding process is typically NOT recommended for aluminum
structural welding under D1.2?
A. GMAW
B. GTAW
C. SMAW
D. All of the above are acceptable
Rationale: Under D1.2, SMAW is generally not recommended for aluminum
due to difficulty in maintaining proper arc characteristics and electrode
coating issues; GMAW and GTAW are preferred.
5. What is the minimum preheat temperature typically required for
aluminum welding under D1.2?
A. 50°F
B. 100°F
C. Preheat is generally not required unless specified
D. 200°F
Rationale: Aluminum does not typically require preheat unless the base metal
temperature is below 32°F or the section thickness requires it for specific
applications.
6. Which filler alloy is commonly used with 6061-T6 base metal?
A. ER1100
B. ER4043
, C. ER5356 only
D. ER2319
Rationale: ER4043 and ER5356 are both commonly used with 6061. ER4043
provides better crack resistance but lower strength; ER5356 provides higher
strength.
7. What is the primary function of the wire brush in aluminum welding
preparation?
A. To polish the weld surface
B. To remove the oxide layer before welding
C. To cool the weld area
D. To apply flux
Rationale: Aluminum oxide has a very high melting point (about 3700°F), so it
must be removed mechanically before welding.
8. Within how many hours must aluminum be welded after cleaning per D1.2
recommendations?
A. 4 hours
B. 8 hours
C. 24 hours
D. 48 hours
Rationale: D1.2 recommends welding within 8 hours of cleaning to prevent
re-oxidation of the aluminum surface.
9. What type of current is preferred for GTAW welding of aluminum?
A. DCEN (Direct Current Electrode Negative)
B. DCEP (Direct Current Electrode Positive)
C. AC (Alternating Current)
D. Any current type
