CGSB LEVEL 2 CERTIFICATION EXAM QUESTIONS
AND CORRECT ANSWERS (VERIFIED ANSWERS) Q &
A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of Non-Destructive Testing
(NDT)?
A. Destroy test material
B. Evaluate material without damaging it
C. Increase material strength
D. Modify material structure
Rationale: NDT is used to inspect materials without causing
damage.
Correct Answer: B
2. Which method uses high-frequency sound waves?
A. Radiography
B. Ultrasonic Testing
C. Dye Penetrant
D. Visual Testing
Rationale: Ultrasonic testing uses sound waves to detect flaws.
Correct Answer: B
3. Radiographic testing primarily uses:
A. Magnetic fields
B. X-rays or gamma rays
,C. Ultrasonic waves
D. Infrared light
Rationale: RT uses penetrating radiation to detect internal
flaws.
Correct Answer: B
4. Magnetic Particle Testing is used to detect:
A. Internal voids
B. Surface and near-surface defects
C. Chemical composition
D. Thickness variation
Rationale: MPT detects discontinuities in ferromagnetic
materials.
Correct Answer: B
5. Liquid Penetrant Testing is suitable for:
A. Ferromagnetic materials only
B. Non-porous surface defects
C. Internal cracks only
D. Thick welds only
Rationale: LPT detects surface-breaking defects.
Correct Answer: B
6. The SI unit of frequency is:
,A. Meter
B. Hertz
C. Pascal
D. Joule
Rationale: Frequency is measured in cycles per second (Hz).
Correct Answer: B
7. The velocity of sound in steel is approximately:
A. 1500 m/s
B. 5900 m/s
C. 3000 m/s
D. 1000 m/s
Rationale: Steel has high acoustic velocity (~5900 m/s).
Correct Answer: B
8. A discontinuity is best defined as:
A. A material improvement
B. A break in material structure
C. A polishing defect only
D. A surface coating
Rationale: Discontinuities are interruptions in material
continuity.
Correct Answer: B
, 9. In UT, couplant is used to:
A. Increase radiation
B. Improve sound transmission
C. Harden the material
D. Reduce frequency
Rationale: Couplant eliminates air gaps.
Correct Answer: B
10. The main radiation safety principle is:
A. Time, distance, shielding
B. Heat, pressure, time
C. Speed, angle, force
D. Voltage, current, resistance
Rationale: ALARA principle reduces exposure.
Correct Answer: A
11. The function of a developer in PT is to:
A. Remove cracks
B. Draw penetrant out of defects
C. Clean surfaces
D. Magnetize material
Rationale: Developer enhances indication visibility.
Correct Answer: B
AND CORRECT ANSWERS (VERIFIED ANSWERS) Q &
A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary purpose of Non-Destructive Testing
(NDT)?
A. Destroy test material
B. Evaluate material without damaging it
C. Increase material strength
D. Modify material structure
Rationale: NDT is used to inspect materials without causing
damage.
Correct Answer: B
2. Which method uses high-frequency sound waves?
A. Radiography
B. Ultrasonic Testing
C. Dye Penetrant
D. Visual Testing
Rationale: Ultrasonic testing uses sound waves to detect flaws.
Correct Answer: B
3. Radiographic testing primarily uses:
A. Magnetic fields
B. X-rays or gamma rays
,C. Ultrasonic waves
D. Infrared light
Rationale: RT uses penetrating radiation to detect internal
flaws.
Correct Answer: B
4. Magnetic Particle Testing is used to detect:
A. Internal voids
B. Surface and near-surface defects
C. Chemical composition
D. Thickness variation
Rationale: MPT detects discontinuities in ferromagnetic
materials.
Correct Answer: B
5. Liquid Penetrant Testing is suitable for:
A. Ferromagnetic materials only
B. Non-porous surface defects
C. Internal cracks only
D. Thick welds only
Rationale: LPT detects surface-breaking defects.
Correct Answer: B
6. The SI unit of frequency is:
,A. Meter
B. Hertz
C. Pascal
D. Joule
Rationale: Frequency is measured in cycles per second (Hz).
Correct Answer: B
7. The velocity of sound in steel is approximately:
A. 1500 m/s
B. 5900 m/s
C. 3000 m/s
D. 1000 m/s
Rationale: Steel has high acoustic velocity (~5900 m/s).
Correct Answer: B
8. A discontinuity is best defined as:
A. A material improvement
B. A break in material structure
C. A polishing defect only
D. A surface coating
Rationale: Discontinuities are interruptions in material
continuity.
Correct Answer: B
, 9. In UT, couplant is used to:
A. Increase radiation
B. Improve sound transmission
C. Harden the material
D. Reduce frequency
Rationale: Couplant eliminates air gaps.
Correct Answer: B
10. The main radiation safety principle is:
A. Time, distance, shielding
B. Heat, pressure, time
C. Speed, angle, force
D. Voltage, current, resistance
Rationale: ALARA principle reduces exposure.
Correct Answer: A
11. The function of a developer in PT is to:
A. Remove cracks
B. Draw penetrant out of defects
C. Clean surfaces
D. Magnetize material
Rationale: Developer enhances indication visibility.
Correct Answer: B
