Level III
VT - Visual Testing

Topical Outline

This examination is 2 hours in length, having 90 questions of equal value.

1. Fundamentals
   • Vision and light
   • Ambient conditions
   • Test object characteristics
2. Equipment Accessories
   • Magnifiers/microscopes
   • Mirrors
   • Dimensional
   • Borescopes
   • Video systems
   • Machine vision
   • Replication
   • Temperature indicating devices and materials
   • Chemical aids
   • Surface comparators
   • Lasers
3. Applications and Requirements
• Raw materials
• Primary process materials
• Joining processes
• Fabricated components
• In-service materials
• Coatings
• Other applications
• Requirements
4. Variables Affecting Results of interpretation/ Evaluations
   • Equipment including type and intensity of light
   • Material including the variations of surface finish
   • Discontinuity
   • Determination of dimensions (ie: depth, width, length, etc.)
   • Sampling/scanning
   • Process for reporting visual discontinuities
   • Personnel (human factors)
5. Documentation
6. Safety

References

The number in parentheses following each reference is the ASNT catalog number.

• Level III Study Guide: Visual and Optical Testing (2263)
• NDT Handbook: Volume 8, Visual and Optical Testing (133)
• ASM Handbook Vol. 17, NDE and QC (105)
• Supplement to SNT-TC-1A: VT (Q & A Book) (2034A)
• Materials and Processes for NDT Technology (2250)

 

 

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