ASNT Level II NDT Technician exam Questions
and Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of NDT?
a) To repair defects in materials
b) To detect and evaluate defects without damaging the material
c) To enhance material properties
d) To measure material cost
The main purpose of NDT is to evaluate the condition of a material
or structure without causing damage, ensuring safety and
reliability.
2. Which NDT method is most suitable for detecting surface cracks?
a) Radiographic Testing
b) Liquid Penetrant Testing
c) Ultrasonic Testing
d) Magnetic Particle Testing
Liquid penetrant testing is highly effective at revealing surface-
breaking defects in non-porous materials.
3. Which NDT method uses high-frequency sound waves?
a) Eddy Current Testing
b) Ultrasonic Testing
c) Radiographic Testing
d) Visual Testing
Ultrasonic testing relies on the reflection of high-frequency sound
waves to detect internal flaws.
,4. Which NDT method can be used on non-ferromagnetic metals for
surface defects?
a) Magnetic Particle Testing
b) Eddy Current Testing
c) Ultrasonic Testing
d) Radiographic Testing
Eddy current testing works on conductive materials, including non-
ferromagnetic metals, to detect surface and near-surface flaws.
5. What is the primary safety concern in radiographic testing?
a) Electrical shock
b) Exposure to ionizing radiation
c) Noise levels
d) Chemical burns
Radiographic testing involves X-rays or gamma rays, which are
ionizing radiation that can be harmful if proper precautions are
not taken.
6. Which method is best for inspecting welds for internal voids?
a) Liquid Penetrant Testing
b) Magnetic Particle Testing
c) Radiographic Testing
d) Visual Testing
Radiographic testing can reveal internal discontinuities like voids
and inclusions in welds.
7. In magnetic particle testing, what type of current is typically used
for surface cracks?
a) Alternating current (AC)
b) Direct current (DC)
c) Pulsed DC
d) Radio frequency current
, DC is preferred for surface cracks because it produces a more
uniform magnetic field, which highlights discontinuities.
8. What is the main limitation of visual testing?
a) Requires complex equipment
b) Limited to surface or near-surface defects
c) Cannot detect cracks
d) Requires ionizing radiation
Visual testing is effective only for defects that are visible to the
naked eye or through magnification.
9. Which material property is most critical for ultrasonic testing?
a) Density
b) Acoustic velocity
c) Hardness
d) Magnetism
Ultrasonic testing depends on the speed at which sound travels
through a material, which varies with density and elasticity.
10. What is the function of a couplant in ultrasonic testing?
a) To cool the transducer
b) To clean the surface
c) To facilitate transmission of sound waves
d) To magnetize the material
A couplant eliminates air gaps between the transducer and test
surface, allowing efficient transmission of ultrasonic waves.
11. Which NDT method is most suitable for detecting corrosion
under insulation?
a) Magnetic Particle Testing
b) Ultrasonic Testing
c) Liquid Penetrant Testing
d) Visual Testing
and Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf
1. What is the primary purpose of NDT?
a) To repair defects in materials
b) To detect and evaluate defects without damaging the material
c) To enhance material properties
d) To measure material cost
The main purpose of NDT is to evaluate the condition of a material
or structure without causing damage, ensuring safety and
reliability.
2. Which NDT method is most suitable for detecting surface cracks?
a) Radiographic Testing
b) Liquid Penetrant Testing
c) Ultrasonic Testing
d) Magnetic Particle Testing
Liquid penetrant testing is highly effective at revealing surface-
breaking defects in non-porous materials.
3. Which NDT method uses high-frequency sound waves?
a) Eddy Current Testing
b) Ultrasonic Testing
c) Radiographic Testing
d) Visual Testing
Ultrasonic testing relies on the reflection of high-frequency sound
waves to detect internal flaws.
,4. Which NDT method can be used on non-ferromagnetic metals for
surface defects?
a) Magnetic Particle Testing
b) Eddy Current Testing
c) Ultrasonic Testing
d) Radiographic Testing
Eddy current testing works on conductive materials, including non-
ferromagnetic metals, to detect surface and near-surface flaws.
5. What is the primary safety concern in radiographic testing?
a) Electrical shock
b) Exposure to ionizing radiation
c) Noise levels
d) Chemical burns
Radiographic testing involves X-rays or gamma rays, which are
ionizing radiation that can be harmful if proper precautions are
not taken.
6. Which method is best for inspecting welds for internal voids?
a) Liquid Penetrant Testing
b) Magnetic Particle Testing
c) Radiographic Testing
d) Visual Testing
Radiographic testing can reveal internal discontinuities like voids
and inclusions in welds.
7. In magnetic particle testing, what type of current is typically used
for surface cracks?
a) Alternating current (AC)
b) Direct current (DC)
c) Pulsed DC
d) Radio frequency current
, DC is preferred for surface cracks because it produces a more
uniform magnetic field, which highlights discontinuities.
8. What is the main limitation of visual testing?
a) Requires complex equipment
b) Limited to surface or near-surface defects
c) Cannot detect cracks
d) Requires ionizing radiation
Visual testing is effective only for defects that are visible to the
naked eye or through magnification.
9. Which material property is most critical for ultrasonic testing?
a) Density
b) Acoustic velocity
c) Hardness
d) Magnetism
Ultrasonic testing depends on the speed at which sound travels
through a material, which varies with density and elasticity.
10. What is the function of a couplant in ultrasonic testing?
a) To cool the transducer
b) To clean the surface
c) To facilitate transmission of sound waves
d) To magnetize the material
A couplant eliminates air gaps between the transducer and test
surface, allowing efficient transmission of ultrasonic waves.
11. Which NDT method is most suitable for detecting corrosion
under insulation?
a) Magnetic Particle Testing
b) Ultrasonic Testing
c) Liquid Penetrant Testing
d) Visual Testing
