LATEST AWS D1.2 STRUCTURAL WELDING
CODE – ALUMINUM EXAM OFFERED BY
AMERICAN WELDING SOCIETY (AWS) | Q&A
WITH RATIONALES
1. Which AWS document provides the primary code
for welding structural aluminum for buildings and
bridges?
A) AWS D1.1
B) AWS D1.2/D1.2M
C) AWS D1.3
D) ASME Section IX
Correct answer: B
Rationale: AWS D1.2/D1.2M is the Structural Welding
Code – Aluminum, covering welding requirements
for structures made from aluminum structural alloys,
excluding pressure vessels and pressure piping.〖
0†L30-L33〗
2. Which of the following is explicitly excluded from
the scope of AWS D1.2?
,A) Aluminum pressure vessels
B) Aluminum extrusions
C) 6061‑T6 plate
D) Aluminum sheet metal
Correct answer: A
Rationale: AWS D1.2 covers welding requirements
for any type of structure made from aluminum
structural alloys, except aluminum pressure vessels
and fluid‑carrying pipelines.〖0†L28-L33〗
3. How is aluminum alloy 6061 classified in the AWS
D1.2 base metal grouping system?
A) Non‑heat‑treatable alloy
B) Heat‑treatable alloy (precipitation‑hardenable)
C) Cast aluminum alloy only
D) Pure aluminum series
Correct answer: B
Rationale: 6061 is a heat‑treatable aluminum alloy
that gains strength through precipitation hardening
(aging) after solution heat treatment.〖4†L8-L12〗
,4. What is the most common cause of porosity in
aluminum welds according to AWS D1.2?
A) Excessive preheat
B) Moisture in the base metal or filler metal
C) High welding current
D) Incorrect electrode angle
Correct answer: B
Rationale: Hydrogen from moisture (from the base
metal surface, filler metal, or atmosphere) is highly
soluble in molten aluminum and creates porosity
upon solidification. Codes require elimination of
moisture before welding.〖11†L27-L29〗
5. According to AWS D1.2, what is the maximum
preheat and interpass temperature for 5xxx series
base metals containing more than 3% magnesium?
A) 150°F (65°C)
B) 200°F (93°C)
C) 250°F (121°C)
D) 300°F (149°C)
Correct answer: C
, Rationale: For 5xxx alloys with >3% Mg and for
heat‑treatable alloys, preheat and interpass
temperature should not exceed 250°F for more than
15 minutes to avoid over‑aging and property
degradation.〖9†L4-L7〗
6. What does the “–T6” temper designation signify in
aluminum alloy 6061‑T6?
A) Annealed condition
B) Solution heat‑treated and artificially aged
C) As‑fabricated without heat treatment
D) Strain‑hardened only
Correct answer: B
Rationale: T6 means the alloy has been solution
heat‑treated and then artificially aged to achieve
maximum strength and hardness.〖4†L19-L23〗
7. Which filler metal is most commonly
recommended by AWS D1.2 for welding 6061‑T6
aluminum?
A) ER1100
CODE – ALUMINUM EXAM OFFERED BY
AMERICAN WELDING SOCIETY (AWS) | Q&A
WITH RATIONALES
1. Which AWS document provides the primary code
for welding structural aluminum for buildings and
bridges?
A) AWS D1.1
B) AWS D1.2/D1.2M
C) AWS D1.3
D) ASME Section IX
Correct answer: B
Rationale: AWS D1.2/D1.2M is the Structural Welding
Code – Aluminum, covering welding requirements
for structures made from aluminum structural alloys,
excluding pressure vessels and pressure piping.〖
0†L30-L33〗
2. Which of the following is explicitly excluded from
the scope of AWS D1.2?
,A) Aluminum pressure vessels
B) Aluminum extrusions
C) 6061‑T6 plate
D) Aluminum sheet metal
Correct answer: A
Rationale: AWS D1.2 covers welding requirements
for any type of structure made from aluminum
structural alloys, except aluminum pressure vessels
and fluid‑carrying pipelines.〖0†L28-L33〗
3. How is aluminum alloy 6061 classified in the AWS
D1.2 base metal grouping system?
A) Non‑heat‑treatable alloy
B) Heat‑treatable alloy (precipitation‑hardenable)
C) Cast aluminum alloy only
D) Pure aluminum series
Correct answer: B
Rationale: 6061 is a heat‑treatable aluminum alloy
that gains strength through precipitation hardening
(aging) after solution heat treatment.〖4†L8-L12〗
,4. What is the most common cause of porosity in
aluminum welds according to AWS D1.2?
A) Excessive preheat
B) Moisture in the base metal or filler metal
C) High welding current
D) Incorrect electrode angle
Correct answer: B
Rationale: Hydrogen from moisture (from the base
metal surface, filler metal, or atmosphere) is highly
soluble in molten aluminum and creates porosity
upon solidification. Codes require elimination of
moisture before welding.〖11†L27-L29〗
5. According to AWS D1.2, what is the maximum
preheat and interpass temperature for 5xxx series
base metals containing more than 3% magnesium?
A) 150°F (65°C)
B) 200°F (93°C)
C) 250°F (121°C)
D) 300°F (149°C)
Correct answer: C
, Rationale: For 5xxx alloys with >3% Mg and for
heat‑treatable alloys, preheat and interpass
temperature should not exceed 250°F for more than
15 minutes to avoid over‑aging and property
degradation.〖9†L4-L7〗
6. What does the “–T6” temper designation signify in
aluminum alloy 6061‑T6?
A) Annealed condition
B) Solution heat‑treated and artificially aged
C) As‑fabricated without heat treatment
D) Strain‑hardened only
Correct answer: B
Rationale: T6 means the alloy has been solution
heat‑treated and then artificially aged to achieve
maximum strength and hardness.〖4†L19-L23〗
7. Which filler metal is most commonly
recommended by AWS D1.2 for welding 6061‑T6
aluminum?
A) ER1100
