ASNT NDT III ET study plan

Define the duties, qualifications, and certification levels of an NDT Level III and distinguish them from Level I and Level II responsibilities

List the major NDT methods and state the basic physical principle each relies on

Explain the purpose and typical contents of a written NDT procedure and how it differs from a technique sheet

Identify common discontinuities by manufacturing process (casting, forging, welding) and the methods suited to detect each

Apply the concepts of sensitivity, resolution, and probability of detection to describe why inspection parameters must be controlled

Interpret basic statistical and measurement concepts (accuracy, precision, repeatability) as they apply to NDT results

Describe the structure and intent of a typical NDT qualification standard framework at a conceptual level without quoting it

Explain how calibration, reference standards, and traceability support reliable inspection

Derive and state the equations governing magnetic flux density, field intensity, permeability, and reluctance

Distinguish between magnetic particle and electromagnetic testing principles and the physics each depends on

Explain the origin of the skin effect and calculate standard depth of penetration for given frequency and material properties

Describe how eddy currents are induced and how coil impedance changes when a test object is introduced

Compare the three main coil configurations (absolute, differential, and hybrid) and state the applications and signal behavior of each

Explain impedance plane analysis and how lift-off, conductivity, permeability, and geometry changes produce distinct signal trajectories

Describe the function of each major component in a typical eddy current instrument signal chain

Select probe type, frequency, and coil mode for stated inspection scenarios and justify each choice

Describe reference standards, calibration blocks, and their role in setting gain and phase for a given test

Explain the use of phase analysis and filtering to separate relevant from non-relevant indications

Identify the causes and suppression strategies for common ET artifacts, including edge effects, wobble, and support plate signals

Distinguish relevant, non-relevant, and false indications and describe the decision logic for each

Integrate general NDT principles with ET-specific practice by writing a complete inspection procedure for a tube or surface application

Specify calibration interval, acceptance criteria, and documentation requirements in the procedure

Review the procedure against the general principles of traceability, sensitivity, and repeatability studied in weeks 1-2

Identify ethical and reporting obligations of a Level III in accepting or rejecting inspection results

Solve mixed-domain practice problems under timed conditions to build pacing for a Level III exam

Classify every missed item by root cause (knowledge gap, misread, calculation error) and target the weakest areas

Re-derive the ten most frequently used ET equations from memory without references

Explain general NDT method-selection reasoning out loud for ten given defect scenarios

Revisit and close every item in the week 7 error log

Recite the duties and decision responsibilities of a Level III from memory

Complete a final full-length timed practice exam covering both domains in exam proportion

Consolidate the formula sheet and procedure draft into a single review-ready reference packet