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CGSB NDT Level 2 – Multi-Method Practice ACTUAL EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Brief Exam Coverage: CGSB NDT Level 2 – Multi-Method
This exam covers key topics for each method as outlined in CAN/CGSB standards and industry
practices:
• UT – Principles, equipment calibration (DGS, DAC), flaw sizing, contact & immersion
testing, shear waves, TCG, AWS/API techniques.
• RT – Radiation safety, film interpretation, image quality indicators (IQI), exposure factors,
scatter, geometric unsharpness, real-time radiography.
• MT – Magnetic field theory, yoke & prod techniques, wet/dry methods, AC/DC/HWDC,
demagnetization, particle types, indication classification.
• PT – Penetrant types (fluorescent/visible), sensitivity levels, pre-cleaning, developer
application, processing steps, false indications.
• VT – Direct/indirect inspection, lighting requirements, visual acuity, surface preparation,
codes (ASME, AWS, API), documentation.
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CGSB NDT Level 2 – Multi-Method Practice Exam (150 Questions)
Section A – Ultrasonic Testing (UT) – 30 questions
1. In normal beam (longitudinal wave) UT, the sound beam is introduced into the test piece at
what angle relative to the surface?
• A) 0°
• B) 45°
• C) 70°
• D) 90°
Answer: A
Rationale: Normal beam means the sound travels perpendicular (0°) to the surface;
shear waves use angles.
2. The near field (Fresnel zone) of a flat circular transducer is primarily a function of:
• A) Frequency and material density
• B) Crystal diameter and frequency
• C) Acoustic impedance and velocity
• D) Damping and bandwidth
Answer: B
*Rationale: Near field length = D²f / 4c (diameter² × frequency / 4 × velocity).*
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3. Which of the following is the primary advantage of using a dual-element transducer?
• A) Higher sensitivity to small flaws
• B) Elimination of the near field effect
• C) Better resolution at high temperatures
• D) Lower frequency requirement
Answer: B
Rationale: Dual-element transducers have separate transmit/receive crystals, reducing
the dead zone and near field effects.
4. In immersion testing, the water path is adjusted to place the:
• A) Near field entirely in the water
• B) Near field entirely in the test piece
• C) Far field in the water
• D) Sound beam focus at the back wall
Answer: A
Rationale: Water path should be greater than near field length so that the beam enters
the part in the far field.
5. What is the purpose of a Distance Amplitude Correction (DAC) curve?
• A) Compensate for beam divergence
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• B) Compensate for attenuation and beam spread
• C) Correct for couplant variations
• D) Adjust for material velocity changes
Answer: B
Rationale: DAC compensates for amplitude loss due to attenuation and beam spreading
with distance.
6. A shear wave is generated in steel using an incident longitudinal wave from a plastic wedge.
The wedge angle is chosen such that the refracted angle in steel is:
• A) Less than the first critical angle
• B) Between the first and second critical angles
• C) Greater than the second critical angle
• D) Exactly 90°
Answer: B
Rationale: Shear waves exist when the refracted longitudinal angle exceeds 90° (first
critical angle) but before the shear wave reaches 90° (second critical angle).
7. What is the meaning of “20 dB drop” technique for flaw sizing?
• A) Move transducer until echo drops 20 dB from peak to determine flaw edge
• B) Reduce gain by 20 dB to find smallest detectable flaw
CGSB NDT Level 2 – Multi-Method Practice ACTUAL EXAM
QUESTIONS AND CORRECT VERIFIED SOLUTIONS LATEST
UPDATE THIS YEAR – JUST RELEASED
Brief Exam Coverage: CGSB NDT Level 2 – Multi-Method
This exam covers key topics for each method as outlined in CAN/CGSB standards and industry
practices:
• UT – Principles, equipment calibration (DGS, DAC), flaw sizing, contact & immersion
testing, shear waves, TCG, AWS/API techniques.
• RT – Radiation safety, film interpretation, image quality indicators (IQI), exposure factors,
scatter, geometric unsharpness, real-time radiography.
• MT – Magnetic field theory, yoke & prod techniques, wet/dry methods, AC/DC/HWDC,
demagnetization, particle types, indication classification.
• PT – Penetrant types (fluorescent/visible), sensitivity levels, pre-cleaning, developer
application, processing steps, false indications.
• VT – Direct/indirect inspection, lighting requirements, visual acuity, surface preparation,
codes (ASME, AWS, API), documentation.
, Page 2 of 87
CGSB NDT Level 2 – Multi-Method Practice Exam (150 Questions)
Section A – Ultrasonic Testing (UT) – 30 questions
1. In normal beam (longitudinal wave) UT, the sound beam is introduced into the test piece at
what angle relative to the surface?
• A) 0°
• B) 45°
• C) 70°
• D) 90°
Answer: A
Rationale: Normal beam means the sound travels perpendicular (0°) to the surface;
shear waves use angles.
2. The near field (Fresnel zone) of a flat circular transducer is primarily a function of:
• A) Frequency and material density
• B) Crystal diameter and frequency
• C) Acoustic impedance and velocity
• D) Damping and bandwidth
Answer: B
*Rationale: Near field length = D²f / 4c (diameter² × frequency / 4 × velocity).*
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3. Which of the following is the primary advantage of using a dual-element transducer?
• A) Higher sensitivity to small flaws
• B) Elimination of the near field effect
• C) Better resolution at high temperatures
• D) Lower frequency requirement
Answer: B
Rationale: Dual-element transducers have separate transmit/receive crystals, reducing
the dead zone and near field effects.
4. In immersion testing, the water path is adjusted to place the:
• A) Near field entirely in the water
• B) Near field entirely in the test piece
• C) Far field in the water
• D) Sound beam focus at the back wall
Answer: A
Rationale: Water path should be greater than near field length so that the beam enters
the part in the far field.
5. What is the purpose of a Distance Amplitude Correction (DAC) curve?
• A) Compensate for beam divergence
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• B) Compensate for attenuation and beam spread
• C) Correct for couplant variations
• D) Adjust for material velocity changes
Answer: B
Rationale: DAC compensates for amplitude loss due to attenuation and beam spreading
with distance.
6. A shear wave is generated in steel using an incident longitudinal wave from a plastic wedge.
The wedge angle is chosen such that the refracted angle in steel is:
• A) Less than the first critical angle
• B) Between the first and second critical angles
• C) Greater than the second critical angle
• D) Exactly 90°
Answer: B
Rationale: Shear waves exist when the refracted longitudinal angle exceeds 90° (first
critical angle) but before the shear wave reaches 90° (second critical angle).
7. What is the meaning of “20 dB drop” technique for flaw sizing?
• A) Move transducer until echo drops 20 dB from peak to determine flaw edge
• B) Reduce gain by 20 dB to find smallest detectable flaw
