ASNT NDT Level III MT study plan

Define and relate flux density, field strength, permeability, and reluctance, and compute B, H, and μ in inch-pound and SI units

Classify ferromagnetic, paramagnetic, and diamagnetic materials and predict which will support magnetic particle testing

Explain hysteresis loop features-saturation, retentivity, coercive force, residual field-and how each affects particle retention after magnetization

Differentiate AC, half-wave DC, and full-wave DC fields in terms of penetration depth, skin effect, and suitability for surface versus near-surface flaws

Predict leakage-field formation at surface and near-surface discontinuities and explain how flaw orientation relative to flux direction controls detectability

Select the magnetization direction required to detect a flaw of given orientation on a specified part geometry

Explain the consequences of the skin effect for detection depth with AC versus rectified current

Determine when demagnetization is required and describe how residual field is measured and reduced

Compare dry powder, wet visible, and wet fluorescent particle systems and specify the correct one for a given application and surface condition

Describe carrier fluid types (oil versus water) and state the properties that govern particle mobility and background

State and apply the settled-volume test limits for wet particle concentration and recognize when a bath must be corrected or replaced

Compute coil and central-conductor magnetizing currents from the length-to-diameter relationship and specify prod spacing and current for prod magnetization

Sequence the operations of a magnetic particle test from pre-cleaning through post-test cleaning and demagnetization

Perform and record the routine process-control checks: black-light intensity, ambient white light, particle concentration, bath contamination, and yoke lifting power

Compare measured process-control values against acceptance limits and state the corrective action for each out-of-limit result

Draft procedure language for magnetization and particle application on a representative part family

Design a technique for a given part by specifying magnetization method, current values, particle type, application method, and inspection sequence

Justify sensitivity and coverage tradeoffs, including surface preparation, contrast aids, and viewing conditions

Define technique qualification by demonstration and state the record-keeping it requires

Identify procedural deviations, assess their effect on test validity, and describe the required documentation

Locate the governing requirements for magnetization, particle application, and process control within the applicable MT standards and codes

Build a clause-level comparison of how the principal ferromagnetic-particle standards treat the same technical requirement

Resolve a conflict between a specification and a referenced standard by applying the precedence rules stated in the documents

Apply the acceptance criteria of a selected code to a described indication and state the basis for the disposition

Classify observed indications as true, false, relevant, or nonrelevant and state the reasoning for each classification

Evaluate indications against stated acceptance criteria and assign accept, reject, or rework dispositions

Differentiate a magnetic particle indication from the discontinuity that produced it, including the effect of geometry and residual magnetism

Write a test report containing all required elements: scope, reference documents, technique, equipment, calibration status, results, disposition, and sign-off

Rehearse all five domains under timed conditions and score each domain separately to expose weak areas

Re-derive the most-missed calculations from memory without notes

Reconcile every missed question to its source concept and restate the correct reasoning in writing

Consolidate a final quick-reference sheet limited to material you can justify from first principles or a cited clause