Latest CWB Level 2 Visual Welding Inspector exam verified with correct answers
plus rationales 2026/2027 instant pdf
1. What is the primary purpose of visual welding inspection?
A. To determine the chemical composition of the weld
B. To identify weld discontinuities and verify compliance with specified requirements
C. To replace all nondestructive testing
D. To determine the exact tensile strength of the weld
Answer: B. To identify weld discontinuities and verify compliance with specified requirements.
Rationale: Visual inspection evaluates weld appearance, dimensions, workmanship, and visible
discontinuities against applicable acceptance criteria.
2. What is the heat-affected zone (HAZ)?
A. The weld reinforcement only
B. Base metal whose properties have been altered by welding heat
C. The electrode coating
D. The shielding-gas region
Answer: B. Base metal whose properties have been altered by welding heat.
Rationale: The HAZ is adjacent base material affected metallurgically by the heat of welding but
not melted.
3. Which of the following is a weld discontinuity?
A. Porosity
B. Correct weld size
C. Proper reinforcement
D. Correct joint preparation
Answer: A. Porosity.
Rationale: Porosity is a gas-related discontinuity consisting of cavities within the weld metal.
4. Which discontinuity is generally considered especially serious because it can propagate
under stress?
,A. Crack
B. Slight discoloration
C. Uniform weld profile
D. Minor surface oxidation
Answer: A. Crack.
Rationale: Cracks are fracture-type discontinuities and are generally highly detrimental to weld
integrity.
5. What is undercut?
A. A groove melted into the base metal adjacent to the weld toe that remains unfilled
B. Excess weld metal on the face
C. Gas trapped inside the weld
D. Slag deposited on top of the weld
Answer: A. A groove melted into the base metal adjacent to the weld toe that remains unfilled.
Rationale: Undercut reduces the effective cross-section and can act as a stress concentrator.
6. What is overlap?
A. Weld metal that extends beyond the weld toe or root without proper fusion
B. A gas cavity inside the weld
C. A crack in the HAZ
D. Complete penetration
Answer: A. Weld metal that extends beyond the weld toe or root without proper fusion.
Rationale: Overlap occurs when molten weld metal flows onto the base metal without adequately
fusing to it.
7. What is incomplete fusion?
A. Failure of weld metal to properly fuse with the base metal or an adjacent weld pass
B. Excessive penetration
C. Gas porosity
D. Proper sidewall fusion
,Answer: A. Failure of weld metal to properly fuse with the base metal or an adjacent weld pass.
Rationale: Incomplete fusion represents inadequate metallurgical bonding between weld metal
and the intended surface.
8. What is incomplete penetration?
A. Failure of weld metal to extend completely through the joint thickness when complete
penetration is required
B. Excessive weld reinforcement
C. A surface crack
D. Excessive undercut
Answer: A. Failure of weld metal to extend completely through the joint thickness when complete
penetration is required.
Rationale: Incomplete penetration occurs when the required weld depth is not achieved at the
joint root.
9. Which tool is commonly used by a visual welding inspector to measure weld dimensions?
A. Welding gauge
B. Thermometer only
C. Multimeter only
D. Barometer
Answer: A. Welding gauge.
Rationale: Weld gauges can be used to evaluate dimensions such as fillet weld size,
reinforcement, undercut, and other profile characteristics.
10. Why is adequate lighting important during visual inspection?
A. It improves the inspector's ability to detect surface conditions and discontinuities
B. It increases welding current
C. It changes the weld's metallurgy
D. It eliminates the need for inspection tools
Answer: A. It improves the inspector's ability to detect surface conditions and discontinuities.
, Rationale: Proper illumination is essential for reliable visual examination.
11. Which inspection should normally occur before welding begins?
A. Verification of joint preparation and applicable welding requirements
B. Radiographic examination of the finished weld
C. Destructive tensile testing
D. Fracture testing of every joint
Answer: A. Verification of joint preparation and applicable welding requirements.
Rationale: Pre-weld inspection can identify incorrect materials, joint dimensions, fit-up,
cleanliness, and other issues before welding starts.
12. Which item should be checked during fit-up inspection?
A. Joint alignment and root opening
B. Paint color only
C. Inspector's shoe size
D. Ambient noise only
Answer: A. Joint alignment and root opening.
Rationale: Proper fit-up is important for achieving the required weld geometry and penetration.
13. Why may preheat be required before welding?
A. To control cooling rate and reduce the risk of hydrogen-assisted cracking
B. To eliminate the need for shielding gas
C. To increase weld porosity
D. To replace post-weld inspection
Answer: A. To control cooling rate and reduce the risk of hydrogen-assisted cracking.
Rationale: Preheat can reduce cooling rate, influence microstructure, and help reduce
hydrogen-related cracking risk when required by the applicable procedure.
14. What is hydrogen-assisted cracking associated with?
plus rationales 2026/2027 instant pdf
1. What is the primary purpose of visual welding inspection?
A. To determine the chemical composition of the weld
B. To identify weld discontinuities and verify compliance with specified requirements
C. To replace all nondestructive testing
D. To determine the exact tensile strength of the weld
Answer: B. To identify weld discontinuities and verify compliance with specified requirements.
Rationale: Visual inspection evaluates weld appearance, dimensions, workmanship, and visible
discontinuities against applicable acceptance criteria.
2. What is the heat-affected zone (HAZ)?
A. The weld reinforcement only
B. Base metal whose properties have been altered by welding heat
C. The electrode coating
D. The shielding-gas region
Answer: B. Base metal whose properties have been altered by welding heat.
Rationale: The HAZ is adjacent base material affected metallurgically by the heat of welding but
not melted.
3. Which of the following is a weld discontinuity?
A. Porosity
B. Correct weld size
C. Proper reinforcement
D. Correct joint preparation
Answer: A. Porosity.
Rationale: Porosity is a gas-related discontinuity consisting of cavities within the weld metal.
4. Which discontinuity is generally considered especially serious because it can propagate
under stress?
,A. Crack
B. Slight discoloration
C. Uniform weld profile
D. Minor surface oxidation
Answer: A. Crack.
Rationale: Cracks are fracture-type discontinuities and are generally highly detrimental to weld
integrity.
5. What is undercut?
A. A groove melted into the base metal adjacent to the weld toe that remains unfilled
B. Excess weld metal on the face
C. Gas trapped inside the weld
D. Slag deposited on top of the weld
Answer: A. A groove melted into the base metal adjacent to the weld toe that remains unfilled.
Rationale: Undercut reduces the effective cross-section and can act as a stress concentrator.
6. What is overlap?
A. Weld metal that extends beyond the weld toe or root without proper fusion
B. A gas cavity inside the weld
C. A crack in the HAZ
D. Complete penetration
Answer: A. Weld metal that extends beyond the weld toe or root without proper fusion.
Rationale: Overlap occurs when molten weld metal flows onto the base metal without adequately
fusing to it.
7. What is incomplete fusion?
A. Failure of weld metal to properly fuse with the base metal or an adjacent weld pass
B. Excessive penetration
C. Gas porosity
D. Proper sidewall fusion
,Answer: A. Failure of weld metal to properly fuse with the base metal or an adjacent weld pass.
Rationale: Incomplete fusion represents inadequate metallurgical bonding between weld metal
and the intended surface.
8. What is incomplete penetration?
A. Failure of weld metal to extend completely through the joint thickness when complete
penetration is required
B. Excessive weld reinforcement
C. A surface crack
D. Excessive undercut
Answer: A. Failure of weld metal to extend completely through the joint thickness when complete
penetration is required.
Rationale: Incomplete penetration occurs when the required weld depth is not achieved at the
joint root.
9. Which tool is commonly used by a visual welding inspector to measure weld dimensions?
A. Welding gauge
B. Thermometer only
C. Multimeter only
D. Barometer
Answer: A. Welding gauge.
Rationale: Weld gauges can be used to evaluate dimensions such as fillet weld size,
reinforcement, undercut, and other profile characteristics.
10. Why is adequate lighting important during visual inspection?
A. It improves the inspector's ability to detect surface conditions and discontinuities
B. It increases welding current
C. It changes the weld's metallurgy
D. It eliminates the need for inspection tools
Answer: A. It improves the inspector's ability to detect surface conditions and discontinuities.
, Rationale: Proper illumination is essential for reliable visual examination.
11. Which inspection should normally occur before welding begins?
A. Verification of joint preparation and applicable welding requirements
B. Radiographic examination of the finished weld
C. Destructive tensile testing
D. Fracture testing of every joint
Answer: A. Verification of joint preparation and applicable welding requirements.
Rationale: Pre-weld inspection can identify incorrect materials, joint dimensions, fit-up,
cleanliness, and other issues before welding starts.
12. Which item should be checked during fit-up inspection?
A. Joint alignment and root opening
B. Paint color only
C. Inspector's shoe size
D. Ambient noise only
Answer: A. Joint alignment and root opening.
Rationale: Proper fit-up is important for achieving the required weld geometry and penetration.
13. Why may preheat be required before welding?
A. To control cooling rate and reduce the risk of hydrogen-assisted cracking
B. To eliminate the need for shielding gas
C. To increase weld porosity
D. To replace post-weld inspection
Answer: A. To control cooling rate and reduce the risk of hydrogen-assisted cracking.
Rationale: Preheat can reduce cooling rate, influence microstructure, and help reduce
hydrogen-related cracking risk when required by the applicable procedure.
14. What is hydrogen-assisted cracking associated with?
