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WorksheetsWelding Inspection and ISO 3834 Multiple Choice Questions
Total questions: 15
Worksheet time: 8mins
ISO 3834 identifies welding as a “special process.” Which statement best explains the inspection implication of this classification?
A. Welding faults are always visible and easy to repair.
B. Final product testing alone is not enough; inspection must occur before, during, and after welding.
C. Inspectors may rely only on automated NDT equipment.
D. Welders alone are responsible for detecting non-conformities.
Which inspection sequence best reflects ISO 3834’s intent for detecting welding faults?
Post-weld NDT → Documentation → Final Release
Visual Test → Radiography → Welding Procedure Qualification → Repair
Pre-weld inspection → In-process monitoring → Post-weld inspection/NDT
Mechanical Testing → Welder Qualification → Job Completion
A welding inspector finds surface porosity during VT. What is the most correct ISO 3834-aligned next step?
Release the weld if porosity is cosmetic.
Stop and compare with acceptance criteria before deciding on rework.
Immediately order destructive testing.
Ask welder to hide it with cover passes.
Which defect is LEAST likely to be detected by Visual Testing (VT)?
A. Undercut
B. Surface crack
C. Internal porosity
D. Overlap
Which NDT method is most appropriate for detecting subsurface cracks in ferromagnetic material?
PT
MT
VT
RT
In ISO 3834, who decides acceptance of a detected fault?
Welder performing the joint
Inspector using acceptance criteria in the WPS or relevant weld standard
Production manager based on delivery deadlines
NDT operator using personal preference
An inspector must design an inspection plan for critical pressure vessel welds. Which combination is MOST defensible under ISO 3834?
VT only, if welder is certified
VT + MT/UT based on ITP + acceptance criteria from applicable standard
PT only, because it detects all critical faults
Skip NDT if production volume is high
Porosity is found by RT. Which root cause should be investigated FIRST during fault evaluation?
Incorrect post-weld cleaning
Contaminated joint surface or improper shielding protection
Excessive toe angle
Undersized weld bead
An NDT report shows incomplete fusion. What should occur next under ISO 3834?
Approve the weld if visually acceptable
Record a non-conformity, evaluate extent, and plan repair and re-inspection
Change the WPS without documentation
Ignore defect if internal
Which aligns with ISO 3834’s philosophy for ensuring consistent inspection results?
Allow inspectors to improvise methods
Calibrate inspection and NDT equipment at prescribed intervals
Perform NDT only when the client is present
Skip documentation for minor defects
What is the primary purpose of in-process inspection?
To eliminate the need for post-weld NDT
To detect potential faults early before weld completion
To speed up production
To replace visual inspection
You are tasked to reduce repeated slag inclusions across multiple welds. Which ISO 3834-aligned improvement action is MOST effective?
Increase bead reinforcement
Revise WPS, retrain welder on slag cleaning, and monitor in-process VT
Switch to PT for all welds
Eliminate ITP requirements
Which defect is most effectively revealed by UT rather than RT?
Volumetric porosity cluster
Lack of fusion along the sidewall
Tungsten inclusion
Weld spatter
Which scenario represents proper traceability per ISO 3834 when a weld defect is found?
Record defect with weld ID, NDT result, inspector, WPS reference, and corrective action
Only note the defect location
Record defect verbally during shift meeting
Erase previous weld record if repair is done
A repaired weld must be re-inspected. According to ISO 3834, what is the correct approach?
Skip re-testing to avoid further delays
Apply the same inspection method used for the original fault
Use only visual inspection
Automatically reject the entire weldment
