AZ L-25 Welding Contractor Exam
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
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1. Which welding process uses a continuously fed consumable wire
electrode and shielding gas to create an electric arc?
a. Shielded Metal Arc Welding (SMAW)
b. Gas Metal Arc Welding (GMAW)
c. Gas Tungsten Arc Welding (GTAW)
d. Oxyacetylene welding
Rationale: Gas Metal Arc Welding (GMAW), commonly called MIG
welding, uses a continuously fed wire electrode that serves as both
the electrode and filler metal. Shielding gas protects the molten weld
pool from atmospheric contamination. SMAW uses a flux-coated stick
,electrode, GTAW uses a nonconsumable tungsten electrode, and
oxyacetylene welding relies on a flame rather than an electric arc.
2. What is the primary purpose of shielding gas during gas metal arc
welding?
a. To increase the hardness of the base metal
b. To cool the electrode before it reaches the weld
c. To protect the molten weld pool from atmospheric contamination
d. To eliminate the need for proper joint preparation
Rationale: Shielding gas prevents oxygen, nitrogen, and other
atmospheric gases from contaminating the molten weld metal.
Contamination can cause porosity, oxidation, and reduced weld
quality. Shielding gas does not replace proper joint preparation,
correct welding parameters, or adequate cleanliness.
3. Which electrode is commonly used for general-purpose mild-steel
shielded metal arc welding when good weldability and moderate
penetration are desired?
a. E6010
b. E6013
c. E7018
,d. E308L
Rationale: E6013 is a rutile-coated electrode commonly used for
general-purpose welding on mild steel. It offers relatively easy arc
starting, smooth operation, and manageable slag removal. E6010 is
known for deep penetration and is often used for root passes. E7018 is
a low-hydrogen electrode frequently selected for structural
applications, while E308L is a stainless-steel filler electrode.
4. What does the “70” in an E7018 electrode classification indicate?
a. The electrode contains 70% iron.
b. The electrode can only be used at 70 amperes.
c. The deposited weld metal has a minimum tensile strength of 70,000
psi under the applicable classification requirements.
d. The electrode must be stored at 70°F.
Rationale: In the AWS classification E7018, the first two digits indicate
the minimum tensile strength of the deposited weld metal in
thousands of pounds per square inch. The number 70 represents
70,000 psi. The remaining digits provide information about welding
positions, coating, and current characteristics.
5. Which welding position is designated as the 1G position for a
groove weld?
, a. Horizontal
b. Vertical
c. Overhead
d. Flat
Rationale: The 1G designation identifies a groove weld performed in
the flat position. The workpiece is arranged so that welding can
generally be performed from above the joint. The 2G position is
horizontal, 3G is vertical, and 4G is overhead. Position designations
are important when determining welder qualification and applicable
procedure requirements.
6. What is the principal purpose of a Welding Procedure Specification
(WPS)?
a. To establish the contractor's billing rates
b. To list the names of all project employees
c. To provide the essential welding instructions and parameters for
producing a specified weld
d. To replace all inspection and testing requirements
Rationale: A WPS establishes the welding variables and instructions
needed to produce a weld that meets applicable requirements. It may
Questions and Correct Answers (Verified
Answers) Plus Rationale 2027 Q&A|
Instant Download Pdf
1. Which welding process uses a continuously fed consumable wire
electrode and shielding gas to create an electric arc?
a. Shielded Metal Arc Welding (SMAW)
b. Gas Metal Arc Welding (GMAW)
c. Gas Tungsten Arc Welding (GTAW)
d. Oxyacetylene welding
Rationale: Gas Metal Arc Welding (GMAW), commonly called MIG
welding, uses a continuously fed wire electrode that serves as both
the electrode and filler metal. Shielding gas protects the molten weld
pool from atmospheric contamination. SMAW uses a flux-coated stick
,electrode, GTAW uses a nonconsumable tungsten electrode, and
oxyacetylene welding relies on a flame rather than an electric arc.
2. What is the primary purpose of shielding gas during gas metal arc
welding?
a. To increase the hardness of the base metal
b. To cool the electrode before it reaches the weld
c. To protect the molten weld pool from atmospheric contamination
d. To eliminate the need for proper joint preparation
Rationale: Shielding gas prevents oxygen, nitrogen, and other
atmospheric gases from contaminating the molten weld metal.
Contamination can cause porosity, oxidation, and reduced weld
quality. Shielding gas does not replace proper joint preparation,
correct welding parameters, or adequate cleanliness.
3. Which electrode is commonly used for general-purpose mild-steel
shielded metal arc welding when good weldability and moderate
penetration are desired?
a. E6010
b. E6013
c. E7018
,d. E308L
Rationale: E6013 is a rutile-coated electrode commonly used for
general-purpose welding on mild steel. It offers relatively easy arc
starting, smooth operation, and manageable slag removal. E6010 is
known for deep penetration and is often used for root passes. E7018 is
a low-hydrogen electrode frequently selected for structural
applications, while E308L is a stainless-steel filler electrode.
4. What does the “70” in an E7018 electrode classification indicate?
a. The electrode contains 70% iron.
b. The electrode can only be used at 70 amperes.
c. The deposited weld metal has a minimum tensile strength of 70,000
psi under the applicable classification requirements.
d. The electrode must be stored at 70°F.
Rationale: In the AWS classification E7018, the first two digits indicate
the minimum tensile strength of the deposited weld metal in
thousands of pounds per square inch. The number 70 represents
70,000 psi. The remaining digits provide information about welding
positions, coating, and current characteristics.
5. Which welding position is designated as the 1G position for a
groove weld?
, a. Horizontal
b. Vertical
c. Overhead
d. Flat
Rationale: The 1G designation identifies a groove weld performed in
the flat position. The workpiece is arranged so that welding can
generally be performed from above the joint. The 2G position is
horizontal, 3G is vertical, and 4G is overhead. Position designations
are important when determining welder qualification and applicable
procedure requirements.
6. What is the principal purpose of a Welding Procedure Specification
(WPS)?
a. To establish the contractor's billing rates
b. To list the names of all project employees
c. To provide the essential welding instructions and parameters for
producing a specified weld
d. To replace all inspection and testing requirements
Rationale: A WPS establishes the welding variables and instructions
needed to produce a weld that meets applicable requirements. It may
