Types of NDT (1)

Question 1

Ultrasonic Testing

Answer 1

High-frequency sound waves.

Equipment:

• Ultrasonic Flaw Detector
• Piezoeletic Probes and Transducers

Question 2

Radiographic Testing

Answer 2

Penetrating radiation.

Imaging mediums: Film, Dr, Cr
Equipment:
- Gamma-Ray Exposure Device
- Industrial X-Ray Tube

Question 3

Magnetic Particle Testing

Answer 3

Magnetizing a part and applying dyed iron particles. When magnetized the particles will cluster over any defects on the part.

Equipment:

• Stationary Bench
• Hand-held Electromagnetic Yoke

Question 4

Eddy Current

Answer 4

Alternating Current/Variable magnetic fields. Electromagnetic Induction = Alternating circular currents.

Equipment:

• Display Unit
• Alternating Current Probes and Coils

Question 5

Liquid Penetrant

Answer 5

Testing done by coating a part in “Penetrant”, cleaning excess and coating in “Developer”. The developer will clump over any inconsistencies.

Equipment:

• Penetrant
• Cleaning medium (water/solvent based)
• Developer (dry powder, water/solvent suspended)
• UV Black Light

Question 6

Visual Testing

Answer 6

Testing done by looking at the material/part.
 Equipment:
- Fiberscopes
- Mirrors
- Magnifying Glass
- Borescopes
- Vernier Capilers
- Optical Comparators
- Pit Gauges