Bridge Welding Certification Exam
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1.Which welding process is most commonly used for structural steel bridge
fabrication because of its high deposition rate and suitability for heavy
sections?
A. Gas tungsten arc welding (GTAW)
B. Shielded metal arc welding (SMAW)
C. Submerged arc welding (SAW)
D. Oxy-fuel welding
Answer: C. Submerged arc welding (SAW)
Submerged arc welding is widely used in bridge fabrication because it
provides deep penetration, high deposition rates, and consistent weld
quality for large structural steel components.
2. What is the primary purpose of a Welding Procedure Specification
(WPS) in bridge welding?
A. To record only the welder’s personal information
B. To define the approved welding variables and methods
C. To replace all inspection requirements
D. To calculate bridge load capacity
,Answer: B. To define the approved welding variables and methods
A WPS provides documented instructions for welding variables such as
process, materials, position, heat input, and acceptance requirements to
ensure repeatable weld quality.
3. Which organization publishes widely used bridge welding
requirements in the United States?
A. American Welding Society (AWS)
B. Federal Aviation Administration (FAA)
C. Occupational Safety and Health Administration (OSHA)
D. National Fire Protection Association (NFPA)
Answer: A. American Welding Society (AWS)
AWS develops welding standards, including structural welding codes
commonly applied to bridge construction and fabrication.
4. In bridge welding, what does the term “heat-affected zone” (HAZ)
describe?
A. The area where weld metal is deposited only
B. The portion of base metal altered by welding heat without melting
C. The welding machine cooling area
D. The surface coating around a weld
Answer: B. The portion of base metal altered by welding heat without
melting
The HAZ is the region next to the weld where thermal cycles change the
mechanical properties and microstructure of the base metal.
5. Which welding defect is characterized by a cavity or hole caused by
trapped gas?
A. Undercut
B. Porosity
C. Overlap
D. Crater crack
,Answer: B. Porosity
Porosity occurs when gases become trapped in solidifying weld metal,
often due to contamination, improper shielding, or incorrect welding
parameters.
6. Before welding bridge steel, why are surfaces cleaned?
A. To increase welding speed only
B. To remove contaminants that can cause defects
C. To reduce steel thickness
D. To eliminate the need for inspection
Answer: B. To remove contaminants that can cause defects
Removing rust, oil, paint, and moisture helps prevent weld defects such as
porosity, cracking, and lack of fusion.
7. Which welding position represents a horizontal fillet weld on a vertical
surface?
A. 1F
B. 2F
C. 3F
D. 4F
Answer: B. 2F
The 2F position identifies a horizontal fillet weld, where the weld axis is
horizontal and the weld is placed on a vertical surface.
8. What is the purpose of preheating bridge steel before welding?
A. To increase weld contamination
B. To reduce the risk of hydrogen cracking
C. To eliminate the need for filler metal
D. To weaken the steel temporarily
, Answer: B. To reduce the risk of hydrogen cracking
Preheating slows cooling rates and helps prevent cracking by reducing
thermal stresses and hydrogen-related failures.
9. Which inspection method uses X-rays or gamma rays to detect internal
weld flaws?
A. Magnetic particle testing
B. Visual inspection
C. Radiographic testing
D. Liquid penetrant testing
Answer: C. Radiographic testing
Radiographic testing creates images of internal weld conditions and can
reveal hidden discontinuities such as cracks and inclusions.
10. What is the main purpose of welder qualification testing?
A. To determine the welder’s ability to produce acceptable welds
B. To measure bridge traffic loads
C. To replace welding procedures
D. To inspect steel chemistry
Answer: A. To determine the welder’s ability to produce acceptable welds
Welder qualification verifies that an individual has demonstrated the skill
required to produce sound welds under specified conditions.
11. Which electrode classification is commonly associated with low-
hydrogen SMAW electrodes?
A. E6010
B. E6011
C. E7018
D. E7024
Practice Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1.Which welding process is most commonly used for structural steel bridge
fabrication because of its high deposition rate and suitability for heavy
sections?
A. Gas tungsten arc welding (GTAW)
B. Shielded metal arc welding (SMAW)
C. Submerged arc welding (SAW)
D. Oxy-fuel welding
Answer: C. Submerged arc welding (SAW)
Submerged arc welding is widely used in bridge fabrication because it
provides deep penetration, high deposition rates, and consistent weld
quality for large structural steel components.
2. What is the primary purpose of a Welding Procedure Specification
(WPS) in bridge welding?
A. To record only the welder’s personal information
B. To define the approved welding variables and methods
C. To replace all inspection requirements
D. To calculate bridge load capacity
,Answer: B. To define the approved welding variables and methods
A WPS provides documented instructions for welding variables such as
process, materials, position, heat input, and acceptance requirements to
ensure repeatable weld quality.
3. Which organization publishes widely used bridge welding
requirements in the United States?
A. American Welding Society (AWS)
B. Federal Aviation Administration (FAA)
C. Occupational Safety and Health Administration (OSHA)
D. National Fire Protection Association (NFPA)
Answer: A. American Welding Society (AWS)
AWS develops welding standards, including structural welding codes
commonly applied to bridge construction and fabrication.
4. In bridge welding, what does the term “heat-affected zone” (HAZ)
describe?
A. The area where weld metal is deposited only
B. The portion of base metal altered by welding heat without melting
C. The welding machine cooling area
D. The surface coating around a weld
Answer: B. The portion of base metal altered by welding heat without
melting
The HAZ is the region next to the weld where thermal cycles change the
mechanical properties and microstructure of the base metal.
5. Which welding defect is characterized by a cavity or hole caused by
trapped gas?
A. Undercut
B. Porosity
C. Overlap
D. Crater crack
,Answer: B. Porosity
Porosity occurs when gases become trapped in solidifying weld metal,
often due to contamination, improper shielding, or incorrect welding
parameters.
6. Before welding bridge steel, why are surfaces cleaned?
A. To increase welding speed only
B. To remove contaminants that can cause defects
C. To reduce steel thickness
D. To eliminate the need for inspection
Answer: B. To remove contaminants that can cause defects
Removing rust, oil, paint, and moisture helps prevent weld defects such as
porosity, cracking, and lack of fusion.
7. Which welding position represents a horizontal fillet weld on a vertical
surface?
A. 1F
B. 2F
C. 3F
D. 4F
Answer: B. 2F
The 2F position identifies a horizontal fillet weld, where the weld axis is
horizontal and the weld is placed on a vertical surface.
8. What is the purpose of preheating bridge steel before welding?
A. To increase weld contamination
B. To reduce the risk of hydrogen cracking
C. To eliminate the need for filler metal
D. To weaken the steel temporarily
, Answer: B. To reduce the risk of hydrogen cracking
Preheating slows cooling rates and helps prevent cracking by reducing
thermal stresses and hydrogen-related failures.
9. Which inspection method uses X-rays or gamma rays to detect internal
weld flaws?
A. Magnetic particle testing
B. Visual inspection
C. Radiographic testing
D. Liquid penetrant testing
Answer: C. Radiographic testing
Radiographic testing creates images of internal weld conditions and can
reveal hidden discontinuities such as cracks and inclusions.
10. What is the main purpose of welder qualification testing?
A. To determine the welder’s ability to produce acceptable welds
B. To measure bridge traffic loads
C. To replace welding procedures
D. To inspect steel chemistry
Answer: A. To determine the welder’s ability to produce acceptable welds
Welder qualification verifies that an individual has demonstrated the skill
required to produce sound welds under specified conditions.
11. Which electrode classification is commonly associated with low-
hydrogen SMAW electrodes?
A. E6010
B. E6011
C. E7018
D. E7024
