ASNT NDT III RT study plan

Define and differentiate radiation physics terms (activity, exposure, absorbed dose, dose equivalent) and state their SI and traditional units

Derive the inverse square law and half-value layer relationships and apply them to at least 10 numeric practice problems

Explain the operation of X-ray generators and gamma isotope sources (Ir-192, Co-60, Se-75) including spectra and source decay

Solve 15 calculations converting between activity, intensity, and exposure time for a given source-to-film distance

Compare film radiography, CR, and DDA imaging chains and identify where each converts radiation to signal

Describe film construction, characteristic curves, and how density, contrast, and latitude relate

Calculate radiographic contrast and density relationships from given exposure parameters

Explain image quality indicators (penetrameters), sensitivity, and the geometric unsharpness formula

Apply the governing equations for geometric unsharpness, magnification, and source-to-object distance to select technique parameters

Determine required exposure techniques (kilovoltage, milliamperage-time, source size, distance) for plate and pipe geometries

Explain the effect of scattered radiation and describe the purpose of lead screens, filters, and collimation

Distinguish single-wall single-image, double-wall single-image, and double-wall double-image techniques and when each applies

Interpret acceptance criteria concepts for porosity, slag, lack of fusion, and cracks in radiographs of welds and castings

Explain film processing variables (time, temperature, chemistry, agitation) and their effect on density and artifacts

Identify common film and digital artifacts and their root causes

Summarize radiation safety principles: ALARA, dose limits, shielding, survey meters, and the inverse square law in practice

Compare the major NDT methods (RT, UT, MT, PT, ET, VT) by physical principle, capability, and typical applications

Explain the role, responsibilities, and certification structure of NDT Level III personnel

Describe how standards, specifications, and procedures govern NDT and how a written procedure is qualified

Identify discontinuities by type (inherent, processing, service) and relate them to manufacturing processes

Explain calibration, traceability, and measurement uncertainty for NDT equipment

Describe quality control, statistical sampling, and how probability of detection informs technique selection

Summarize the content and purpose of a typical NDT procedure and technique sheet

Apply the hierarchy of standards, codes, and specifications to determine which document governs a given situation

Synthesize RT and general NDT fundamentals by working mixed-topic practice sets under timed conditions

Diagnose recurring error patterns from practice performance and target the weakest subtopics

Re-derive key formulas from memory without reference material

Explain how RT integrates with other methods in a full inspection program

Review all flagged weak areas from the error log and close remaining gaps

Complete a full-length timed mock exam under exam-day conditions

Rehearse rapid recall of units, formulas, and acceptance-criteria concepts

Finalize a personal reference sheet of high-risk facts for last-minute review