NDT Level II Technician Examination Non-

NDT Level II Technician Examination (Non- Destructive Testing) Practice Exam Questions And Correct Answers (Verified Answers) Plus Rationales 2026 Q&A | Instant Download Pdf

• Which NDT method is most suitable for detecting surface cracks in a

non-ferromagnetic material?

• Radiography
• Ultrasonic Testing
• Magnetic Particle Testing
• Dye Penetrant Testing
• Dye Penetrant Testing

Rationale: Dye penetrant testing is effective for locating surface-breaking

defects in non-porous materials, including non-ferromagnetic metals. 1 / 4

• In ultrasonic testing, what does the term “attenuation” refer to?
• Increase in wave velocity
• Decrease in wave amplitude
• Change in wave direction
• Formation of standing waves
• Decrease in wave amplitude

Rationale: Attenuation is the reduction of ultrasonic wave amplitude as it

propagates through a material, caused by scattering, absorption, and other factors.

• Which radiation type is commonly used in industrial radiography?
• Alpha particles
• Beta particles
• Gamma rays and X-rays
• Neutrons
• Gamma rays and X-rays

Rationale: Industrial radiography uses gamma rays (from isotopes like Ir-

192, Co-60) and X-rays for examining internal defects in welds and materials.

• What is the main limitation of magnetic particle testing?
• Cannot detect surface defects
• Only works on ferromagnetic materials
• Cannot detect cracks
• Requires high temperature 2 / 4

• Only works on ferromagnetic materials

Rationale: Magnetic particle testing relies on magnetizing ferromagnetic

materials; it is ineffective on non-ferromagnetic metals.

• Which NDT method is most suitable for detecting volumetric defects

in welds?

• Dye Penetrant Testing
• Magnetic Particle Testing
• Ultrasonic Testing
• Visual Testing
• Ultrasonic Testing

Rationale: Ultrasonic testing can detect both surface and internal

(volumetric) defects, making it ideal for weld inspections.

• In liquid penetrant testing, what is the purpose of the developer?
• To remove excess penetrant
• To enhance surface cracks visibility
• To increase penetration depth
• To clean the material surface
• To enhance surface cracks visibility

Rationale: The developer draws penetrant trapped in defects to the

surface, making indications visible.

• What type of radiation source emits gamma rays?
• Ir-192 and Co-60 3 / 4

• Sr-90 and Pm-147
• Am-241 and Cf-252
• Fe-55 and Kr-85
• Ir-192 and Co-60

Rationale: Iridium-192 and Cobalt-60 are gamma ray emitting isotopes

used in industrial radiography.

• Which parameter primarily affects the resolution in radiographic

testing?

• Source-to-film distance
• Film type
• Object thickness
• All of the above
• All of the above

Rationale: Resolution depends on the radiation source size, source-to-film

distance, object thickness, and type of film or detector used.

9. Eddy current testing is suitable for detecting:

• Surface and near-surface cracks in conductive materials
• Internal voids in ferromagnetic materials
• Porosity in non-metallic materials
• Corrosion in non-conductive materials
• / 4