Michigan Welding Technician Level 3
Exam Practice Questions And Correct
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Rationale 2026 Q&A| Instant Download
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1. A root cause analysis reveals a weld joint repeatedly fails UT
inspection due to lack of fusion at the root. Which corrective action
most directly addresses this defect?
A. Increase shielding gas flow
B. Reduce travel speed and adjust electrode angle
C. Decrease voltage
D. Use a heavier electrode
Reducing travel speed and adjusting electrode angle improves heat
delivery to the root, directly mitigating lack of fusion.
2. When qualifying a welder for groove welds on 1 in (25 mm) thick
plate, which parameter must be demonstrated on the performance
qualification?
A. Weld color
B. Minimum accepted size and penetration requirements
C. Weld spatter resistance
D. Filler metal brand
Performance qualifications require demonstrating welds meet the
minimum size and penetration specified by code.
3. In SMAW, what effect does increasing current have on penetration
and bead profile?
A. Decreases penetration and widens bead
B. Increases penetration and narrows bead
, C. Increases penetration and reduces bead height
D. Decreases penetration and raises bead height
Higher current increases weld pool energy, producing deeper
penetration and a narrower, more fluid bead.
4. Which welding process is most sensitive to wind drafts on outdoor
jobs?
A. FCAW-Self-Shielded
B. GTAW
C. GMAW (MIG)
D. SMAW
GMAW uses a shielding gas that can be blown away by drafts,
making it highly sensitive to wind.
5. What is the primary metallurgical concern when preheating high
carbon steels prior to welding?
A. Loss of ductility
B. Prevention of cracking by slowing cooling rate
C. Increased grain refinement
D. Loss of magnetic properties
Preheating slows cooling, reducing risk of hard brittle structures and
cracking in high carbon steels.
6. During radiographic testing, a discontinuity displayed as a long, thin
line on the film is most likely a:
A. Porosity
B. Burn-through
C. Crack
D. Lack of sidewall fusion
Cracks present as linear discontinuities, producing elongated
indications on radiographs.
7. In FCAW-SS (self-shielded), which factor most influences slag removal
difficulty?
A. Gas flow rate
B. Flux composition
C. Wire diameter
D. Base metal thickness
, Self-shielded flux composition governs slag characteristics and ease
of removal.
8. A welding symbol with a circle around the junction of the arrow and
reference line indicates:
A. Weld all around
B. Field weld
C. Back-gouge required
D. Spot weld
A circled junction indicates the weld is to be made in the field, not in
the shop.
9. What NDT method best detects surface cracks in welds?
A. Radiography
B. Magnetic particle testing
C. Liquid penetrant testing
D. Ultrasonic testing
Liquid penetrant testing is highly effective for identifying
surface-breaking cracks.
10. In GTAW of stainless steel, contamination from oil or grease will
most likely result in:
A. Increased ductility
B. Decreased porosity
C. Increased porosity and surface oxidation
D. Improved corrosion resistance
Contaminants vaporize and form porosity or oxides, degrading weld
quality.
11. Which of the following best explains hydrogen-induced cracking
in welds?
A. Excessive heat input
B. Hydrogen trapped in weld metal forming brittle regions
C. Contaminated shielding gas
D. High electrode moisture
Trapped hydrogen forms high pressure at grain boundaries, leading
to delayed cracking.
12. A bevel angle of 37.5° on a joint indicates:
A. Square groove
Exam Practice Questions And Correct
Answers (Verified Answers) Plus
Rationale 2026 Q&A| Instant Download
1. A root cause analysis reveals a weld joint repeatedly fails UT
inspection due to lack of fusion at the root. Which corrective action
most directly addresses this defect?
A. Increase shielding gas flow
B. Reduce travel speed and adjust electrode angle
C. Decrease voltage
D. Use a heavier electrode
Reducing travel speed and adjusting electrode angle improves heat
delivery to the root, directly mitigating lack of fusion.
2. When qualifying a welder for groove welds on 1 in (25 mm) thick
plate, which parameter must be demonstrated on the performance
qualification?
A. Weld color
B. Minimum accepted size and penetration requirements
C. Weld spatter resistance
D. Filler metal brand
Performance qualifications require demonstrating welds meet the
minimum size and penetration specified by code.
3. In SMAW, what effect does increasing current have on penetration
and bead profile?
A. Decreases penetration and widens bead
B. Increases penetration and narrows bead
, C. Increases penetration and reduces bead height
D. Decreases penetration and raises bead height
Higher current increases weld pool energy, producing deeper
penetration and a narrower, more fluid bead.
4. Which welding process is most sensitive to wind drafts on outdoor
jobs?
A. FCAW-Self-Shielded
B. GTAW
C. GMAW (MIG)
D. SMAW
GMAW uses a shielding gas that can be blown away by drafts,
making it highly sensitive to wind.
5. What is the primary metallurgical concern when preheating high
carbon steels prior to welding?
A. Loss of ductility
B. Prevention of cracking by slowing cooling rate
C. Increased grain refinement
D. Loss of magnetic properties
Preheating slows cooling, reducing risk of hard brittle structures and
cracking in high carbon steels.
6. During radiographic testing, a discontinuity displayed as a long, thin
line on the film is most likely a:
A. Porosity
B. Burn-through
C. Crack
D. Lack of sidewall fusion
Cracks present as linear discontinuities, producing elongated
indications on radiographs.
7. In FCAW-SS (self-shielded), which factor most influences slag removal
difficulty?
A. Gas flow rate
B. Flux composition
C. Wire diameter
D. Base metal thickness
, Self-shielded flux composition governs slag characteristics and ease
of removal.
8. A welding symbol with a circle around the junction of the arrow and
reference line indicates:
A. Weld all around
B. Field weld
C. Back-gouge required
D. Spot weld
A circled junction indicates the weld is to be made in the field, not in
the shop.
9. What NDT method best detects surface cracks in welds?
A. Radiography
B. Magnetic particle testing
C. Liquid penetrant testing
D. Ultrasonic testing
Liquid penetrant testing is highly effective for identifying
surface-breaking cracks.
10. In GTAW of stainless steel, contamination from oil or grease will
most likely result in:
A. Increased ductility
B. Decreased porosity
C. Increased porosity and surface oxidation
D. Improved corrosion resistance
Contaminants vaporize and form porosity or oxides, degrading weld
quality.
11. Which of the following best explains hydrogen-induced cracking
in welds?
A. Excessive heat input
B. Hydrogen trapped in weld metal forming brittle regions
C. Contaminated shielding gas
D. High electrode moisture
Trapped hydrogen forms high pressure at grain boundaries, leading
to delayed cracking.
12. A bevel angle of 37.5° on a joint indicates:
A. Square groove
