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Eddy Current Testing

Basic Principles
History of ET
Present State of ET

The Physics
Properties of Electricity
Current Flow & Ohm's Law
Induction & Inductance
Self Inductance
Mutual Inductance
Circuits & Phase
Depth & Current Density
Phase Lag

Eddy Current Instruments
Resonant Circuits
Impedance Plane
Display - Analog Meter

Probes (Coils)
Probes - Mode of Operation
Probes - Configuration
Probes - Shielding
Coil Design
Impedance Matching

Procedures Issues
Reference Standards
Signal Filtering

Surface Breaking Cracks
SBC using Sliding Probes
Tube Inspection
Heat Treat Verification
Thickness of Thin Mat'ls
Thickness of Coatings

Advanced Techniques
Multi-Frequency Tech.
Swept Frequency Tech.
Pulsed ET Tech.
Background Pulsed ET

Remote Field Tech.


Formulae& Tables
EC Standards & Methods
EC Material Properties

Eddy Current Inspection Quizzes

These quizzes draw from the same database of questions and differ only in the number of questions presented.  Each time a quiz is opened, a new set of random questions will be produced from the database.  The Collaboration for NDE Education does not record the names of individuals taking a quiz or the results of a quiz.

20 Question ET Quiz

35 Question ET Quiz

50 Question ET Quiz