AWS Senior Certified Welding Inspector
(SCWI) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
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1. What is the primary purpose of the AWS SCWI certification?
A. To perform basic welding operations
B. To oversee welding operations and ensure compliance with codes and
standards
C. To replace the need for a Certified Welder (CW)
D. To manufacture welding equipment
Rationale: SCWI certification qualifies an individual to supervise welding
operations, inspect welds, and ensure adherence to AWS codes and
industry standards.
2. Which of the following documents defines the requirements for welding
procedure specifications (WPS)?
A. ASME Section IX
B. AWS D1.1 Structural Welding Code
C. ISO 9001
D. OSHA Safety Standards
Rationale: AWS D1.1 provides the rules for welding procedure
specifications, performance qualifications, and inspection criteria.
,3. A welding inspector notices porosity in a fillet weld. What is the first step?
A. Ignore it if minor
B. Determine the cause and extent of the porosity
C. Replace the entire weld immediately
D. Paint over the weld
Rationale: The inspector must assess the root cause and severity of the
defect before corrective action.
4. Which inspection method is considered destructive?
A. Radiographic Testing
B. Magnetic Particle Testing
C. Ultrasonic Testing
D. Bend Test
Rationale: Bend tests involve physically deforming the weld specimen to
failure, which destroys it.
5. For a fillet weld, which dimension is critical for strength calculation?
A. Leg length
B. Throat thickness
C. Both leg length and throat thickness
D. Weld length only
Rationale: Both the leg length and the effective throat thickness
determine the load-carrying capacity of a fillet weld.
6. When qualifying a welder, what is the significance of the “performance
qualification”?
A. It specifies the WPS
B. It confirms the welder can produce welds that meet code requirements
C. It replaces the need for inspection
D. It certifies materials used
Rationale: Performance qualification ensures that a welder can make
sound welds according to specified procedures.
7. Which code covers welding of structural steel?
A. AWS D1.2
, B. AWS D1.3
C. AWS D1.6
D. AWS D1.1
Rationale: AWS D1.1 is the standard code for welding of structural steel.
8. What type of weld is used to join two parallel plates at the edge?
A. Fillet weld
B. Butt weld
C. Plug weld
D. Slot weld
Rationale: Butt welds join two plates along a common edge, creating a
continuous joint.
9. What is a common cause of cracking in welded joints?
A. Low amperage
B. Excessive preheat
C. High restraint and rapid cooling
D. Proper welding technique
Rationale: High restraint and rapid cooling create tensile stresses that can
cause cracks.
10.Which NDT method uses high-frequency sound waves?
A. Radiographic Testing
B. Magnetic Particle Testing
C. Ultrasonic Testing
D. Visual Testing
Rationale: Ultrasonic testing relies on high-frequency sound waves to
detect internal flaws.
11.When should a welder’s performance qualification be renewed?
A. Every 6 months
B. Every 12 months or after a lapse in welding activity
C. Every 5 years
D. Never
(SCWI) Practice Exam Questions And
Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A Instant Download
1. What is the primary purpose of the AWS SCWI certification?
A. To perform basic welding operations
B. To oversee welding operations and ensure compliance with codes and
standards
C. To replace the need for a Certified Welder (CW)
D. To manufacture welding equipment
Rationale: SCWI certification qualifies an individual to supervise welding
operations, inspect welds, and ensure adherence to AWS codes and
industry standards.
2. Which of the following documents defines the requirements for welding
procedure specifications (WPS)?
A. ASME Section IX
B. AWS D1.1 Structural Welding Code
C. ISO 9001
D. OSHA Safety Standards
Rationale: AWS D1.1 provides the rules for welding procedure
specifications, performance qualifications, and inspection criteria.
,3. A welding inspector notices porosity in a fillet weld. What is the first step?
A. Ignore it if minor
B. Determine the cause and extent of the porosity
C. Replace the entire weld immediately
D. Paint over the weld
Rationale: The inspector must assess the root cause and severity of the
defect before corrective action.
4. Which inspection method is considered destructive?
A. Radiographic Testing
B. Magnetic Particle Testing
C. Ultrasonic Testing
D. Bend Test
Rationale: Bend tests involve physically deforming the weld specimen to
failure, which destroys it.
5. For a fillet weld, which dimension is critical for strength calculation?
A. Leg length
B. Throat thickness
C. Both leg length and throat thickness
D. Weld length only
Rationale: Both the leg length and the effective throat thickness
determine the load-carrying capacity of a fillet weld.
6. When qualifying a welder, what is the significance of the “performance
qualification”?
A. It specifies the WPS
B. It confirms the welder can produce welds that meet code requirements
C. It replaces the need for inspection
D. It certifies materials used
Rationale: Performance qualification ensures that a welder can make
sound welds according to specified procedures.
7. Which code covers welding of structural steel?
A. AWS D1.2
, B. AWS D1.3
C. AWS D1.6
D. AWS D1.1
Rationale: AWS D1.1 is the standard code for welding of structural steel.
8. What type of weld is used to join two parallel plates at the edge?
A. Fillet weld
B. Butt weld
C. Plug weld
D. Slot weld
Rationale: Butt welds join two plates along a common edge, creating a
continuous joint.
9. What is a common cause of cracking in welded joints?
A. Low amperage
B. Excessive preheat
C. High restraint and rapid cooling
D. Proper welding technique
Rationale: High restraint and rapid cooling create tensile stresses that can
cause cracks.
10.Which NDT method uses high-frequency sound waves?
A. Radiographic Testing
B. Magnetic Particle Testing
C. Ultrasonic Testing
D. Visual Testing
Rationale: Ultrasonic testing relies on high-frequency sound waves to
detect internal flaws.
11.When should a welder’s performance qualification be renewed?
A. Every 6 months
B. Every 12 months or after a lapse in welding activity
C. Every 5 years
D. Never
