Delaware Structural Welding
Qualification Examination Practice
Exam 2026 | 100+ Questions & Answers
with Detailed Rationales | Complete
Delaware Structural Welding Exam
Prep, Study Guide, Test Review &
Qualification Preparation
1. What is the primary purpose of a welding procedure specification (WPS)?
A. To identify the welder's employer
B. To define the qualified variables and essential welding requirements
C. To determine the project schedule
D. To calculate material costs
Answer: To define the qualified variables and essential welding requirements
Rationale: A WPS provides the essential welding parameters and variables
needed to produce an acceptable weld under the applicable qualification
requirements.
, 2. Which welding process uses a continuously fed consumable wire electrode
and shielding gas?
A. SMAW
B. GTAW
C. GMAW
D. SAW
Answer: GMAW
Rationale: Gas Metal Arc Welding uses a continuously fed wire electrode and
normally uses an externally supplied shielding gas.
3. What does SMAW stand for?
A. Shielded Metal Arc Welding
B. Standard Manual Arc Welding
C. Submerged Metal Arc Welding
D. Shielded Mechanical Arc Welding
Answer: Shielded Metal Arc Welding
Rationale: SMAW uses a flux-coated consumable electrode that provides
shielding as the coating decomposes during welding.
4. What is the primary function of electrode flux in SMAW?
A. Increase base-metal thickness
B. Provide shielding and form slag
C. Cool the weld immediately
D. Remove all carbon from the steel
Answer: Provide shielding and form slag
Rationale: The electrode coating generates shielding gases and forms slag that
protects the molten weld metal during solidification.
5. What does GTAW commonly use as its electrode?
,A. Carbon rod
B. Tungsten electrode
C. Copper wire
D. Steel rod
Answer: Tungsten electrode
Rationale: Gas Tungsten Arc Welding uses a nonconsumable tungsten electrode
to establish the arc.
6. What is the main purpose of shielding gas during arc welding?
A. Increase weld hardness
B. Prevent atmospheric contamination of the weld pool
C. Increase electrode diameter
D. Remove slag mechanically
Answer: Prevent atmospheric contamination of the weld pool
Rationale: Shielding gas protects molten metal from oxygen, nitrogen, and
other atmospheric contaminants that can cause weld defects.
7. What is a weld discontinuity?
A. Always an unacceptable defect
B. An interruption in the normal structure of a weld
C. A welding license
D. A type of welding machine
Answer: An interruption in the normal structure of a weld
Rationale: A discontinuity is a deviation from the intended weld structure; it
becomes a defect only when it exceeds applicable acceptance criteria.
8. Which discontinuity is characterized by gas pockets trapped in weld metal?
A. Porosity
B. Undercut
, C. Overlap
D. Lamellar tearing
Answer: Porosity
Rationale: Porosity consists of cavities caused by gas becoming trapped as
molten weld metal solidifies.
9. What is undercut?
A. A crack inside the electrode
B. A groove melted into the base metal adjacent to the weld and left unfilled
C. Excessive reinforcement
D. Slag trapped beneath the weld
Answer: A groove melted into the base metal adjacent to the weld and left
unfilled
Rationale: Undercut reduces the effective cross-sectional area of the base metal
and can create a stress concentration.
10.What is lack of fusion?
A. Excessive weld reinforcement
B. Failure of weld metal to properly fuse with the base metal or previous weld
bead
C. Excessive electrode moisture
D. A welding position
Answer: Failure of weld metal to properly fuse with the base metal or previous
weld bead
Rationale: Lack of fusion occurs when the required metallurgical bond is not
achieved between adjoining surfaces.
11.What is lack of penetration?
Qualification Examination Practice
Exam 2026 | 100+ Questions & Answers
with Detailed Rationales | Complete
Delaware Structural Welding Exam
Prep, Study Guide, Test Review &
Qualification Preparation
1. What is the primary purpose of a welding procedure specification (WPS)?
A. To identify the welder's employer
B. To define the qualified variables and essential welding requirements
C. To determine the project schedule
D. To calculate material costs
Answer: To define the qualified variables and essential welding requirements
Rationale: A WPS provides the essential welding parameters and variables
needed to produce an acceptable weld under the applicable qualification
requirements.
, 2. Which welding process uses a continuously fed consumable wire electrode
and shielding gas?
A. SMAW
B. GTAW
C. GMAW
D. SAW
Answer: GMAW
Rationale: Gas Metal Arc Welding uses a continuously fed wire electrode and
normally uses an externally supplied shielding gas.
3. What does SMAW stand for?
A. Shielded Metal Arc Welding
B. Standard Manual Arc Welding
C. Submerged Metal Arc Welding
D. Shielded Mechanical Arc Welding
Answer: Shielded Metal Arc Welding
Rationale: SMAW uses a flux-coated consumable electrode that provides
shielding as the coating decomposes during welding.
4. What is the primary function of electrode flux in SMAW?
A. Increase base-metal thickness
B. Provide shielding and form slag
C. Cool the weld immediately
D. Remove all carbon from the steel
Answer: Provide shielding and form slag
Rationale: The electrode coating generates shielding gases and forms slag that
protects the molten weld metal during solidification.
5. What does GTAW commonly use as its electrode?
,A. Carbon rod
B. Tungsten electrode
C. Copper wire
D. Steel rod
Answer: Tungsten electrode
Rationale: Gas Tungsten Arc Welding uses a nonconsumable tungsten electrode
to establish the arc.
6. What is the main purpose of shielding gas during arc welding?
A. Increase weld hardness
B. Prevent atmospheric contamination of the weld pool
C. Increase electrode diameter
D. Remove slag mechanically
Answer: Prevent atmospheric contamination of the weld pool
Rationale: Shielding gas protects molten metal from oxygen, nitrogen, and
other atmospheric contaminants that can cause weld defects.
7. What is a weld discontinuity?
A. Always an unacceptable defect
B. An interruption in the normal structure of a weld
C. A welding license
D. A type of welding machine
Answer: An interruption in the normal structure of a weld
Rationale: A discontinuity is a deviation from the intended weld structure; it
becomes a defect only when it exceeds applicable acceptance criteria.
8. Which discontinuity is characterized by gas pockets trapped in weld metal?
A. Porosity
B. Undercut
, C. Overlap
D. Lamellar tearing
Answer: Porosity
Rationale: Porosity consists of cavities caused by gas becoming trapped as
molten weld metal solidifies.
9. What is undercut?
A. A crack inside the electrode
B. A groove melted into the base metal adjacent to the weld and left unfilled
C. Excessive reinforcement
D. Slag trapped beneath the weld
Answer: A groove melted into the base metal adjacent to the weld and left
unfilled
Rationale: Undercut reduces the effective cross-sectional area of the base metal
and can create a stress concentration.
10.What is lack of fusion?
A. Excessive weld reinforcement
B. Failure of weld metal to properly fuse with the base metal or previous weld
bead
C. Excessive electrode moisture
D. A welding position
Answer: Failure of weld metal to properly fuse with the base metal or previous
weld bead
Rationale: Lack of fusion occurs when the required metallurgical bond is not
achieved between adjoining surfaces.
11.What is lack of penetration?
