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Visual Testing
Chapter 1: Introduction to Visual Testing
Tips before getting started
Definition of visual testing (1:05)
History of Visual Testing (3:05)
Overview of VT applications: Capabilities and Limitations (4:40)
Let's Recap
Read Chapter 1
Review 1
Chapter 2: Physics and Fundamentals of Visual Testing
The Nature Of Light (3:27)
Light sources (2:56)
Let's Recap
Measurement of Illumination and Interaction of Light with Matter (5:43)
Let's Recap
Light Intensity and Illumination (5:47)
Interactive Practice Questions on Inverse Square Law
Luminance, Reflectivity and Reflectivity Contrast (5:58)
Let's Recap
Environmental Factors and Safety (2:09)
Let's Recap
Perception and Illusion (4:31)
Let's Recap
Read Chapter 2
Review 2
Chapter 3: Visual Testing Techniques
Visual Testing Techniques (0:43)
Direct Visual Testing (7:30)
Let's Recap
Tactile Testing (1:10)
Indirect or Remote VT (3:07)
RVT Cameras (2:46)
Translucent Visual Testing (1:16)
Let's Recap
Examples of VT Applications (4:45)
Let's Recap
Read Chapter 3
Review 3
Chapter 4: Basic Visual Testing Equipment
Mirrors (4:49)
Magnifiers (5:13)
Let's Recap
Borescopes: Rigid Borescopes (3:52)
Fiber Borescopes and Video Borescopes (3:45)
Video Borescope Demonstration
Olympus Video Borescope
Let's Recap
Interactive Practice Questions on Borescopes
Light Sources and Special Lighting (5:32)
Let's Recap
Visual Examination on field
Measurement Tools (5:47)
Calipers
Let's Recap Rulers and Calipers
Interactive Practical on Rulers
Micrometers
Feeler and Wire Gages
Go/no-go Gages #1
Go/no-go Gages #2 (Thread Plug Gages)
Let's Recap Micrometer, Feeler Gage and Calibration
Interactive Practice Questions on Measurement Tools
Read Chapter 4
Review 4
Chapter 5: Visual Testing of Welds
4 documents to download
Welds and Welding Processes (6:50)
Stick Welding (or Shielded Metal Arc Welding: SMAW)
MIG Welding (GMAW)
TIG Welding (GTAW)
Flux Cored Arc Welding (FCAW)
Welding Discontinuities Part 1
Welding Discontinuities Part 2
Welding Discontinuities Part 3
Incomplete Penetration and Lack of Fusion Weld Defects (3:20)
Let's Recap Disconituities
Interactive Practice Questions on Weld Defects
Direct Visual Testing of Welds
Let's Recap Gages
Interactive Practical on Fillet Gage: Leg Length Measurement
Interactive Practical on Concavity Measurements
Interactive Practice Questions on Gages
Visual Inspection of Welds (tips)
Weld Replicas and Tools for Visual Inspection
Read Chapter 5
Review 5
Chapter 6: Visual Testing of Castings and Wrought Products
Casting Process
Casting Types
Casting Discontinuities
Rolling Process Video
Direct Visual Testing of Rolled Products
Evaluation of Plates (Wrought Products)
Read Chapter 6
Review 6
Chapter 7: Visual Testing Procedures
Sample Instruction (24:01)
Who writes what
Inspection Objectives
Timing or Sampling Plans (1:23)
Inspection Checklists/Checkpoints
Classification of Discontinuities (6:44)
Reporting
Read Chapter 7
Review 7
AWS D17.1 Excerpt with Explanations
Chapter 8: Elements of Vision
Anatomy of Eye
Anatomy of the eye and mechanics of vision
Adaption and accommodation
Vision limitations, perception, orientation, and disorders
Vision acuity
Snellen Chart or 20/20 Vision #1
Snellen Chart or 20/20 Vision #2
Landolt Rings Chart
Jaeger Chart
Shades of gray and color differentiation
The Ishihara Color Blind Test
Read Chapter 8
Review 8
Chapter 9: Elements of Lighting
What is Light?
Fundamentals of light
Light sources
Light Bulbs: LED vs Incandescent
How lasers work #1
How lasers work #2
Lasers
Glare and fatigue
Read Chapter 9
Review 9
Chapter 10: Optics
Refraction Of Light (2:37)
Refraction of light
Math on Refraction of Light
Practice Math Problems
How do Prisms Work?
Prisms #2
How prisms change the direction of light
How Lenses Work
Lenses Inside Rigid Borescope (5:33)
How lenses focus light
Borescope magnification
How Fiber Optics Work #1
How Fiber Optics Work #2
Fiber optics and fiber bundles
Digitization and charge-coupled devices #1
Digitization and charge-coupled devices #2
Digitization and charge-coupled devices Reading
Read Chapter 10
Review 10
Chapter 11: Advanced Visual Testing Equipment
Video Borescopes
Rigid and Flexible Digital Borescopes
Pipe crawler camera system
Subsea ROV
Checklist for selecting suitable equipment
Reading Assignment
Review 11
Chapter 12: Service-Induced Discontinuities
Stages of Discontinuites (5:05)
Inservice versus Inherent and Processing Discontinuities
Ductile vs Brittle Fracture (3:02)
Discontinuities caused by mechanical loads
Discontinuities caused by thermal & chemical loads (13:58)
Read Chapter 12
Review 12
Chapter 13: Evaluation
General evaluation scheme
Surface Roughness Comparators
Size-based criteria
Review 13
Final Review
Final Review (61:45)
General Knowledge
AWS D17.1 Excerpt with Explanations
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