Welding Certification — Knowledge Practice
Testing and inspection: practice questions
Our Welding Knowledge bank has 12 questions on this topic. Here are 3 of them with answers; the full mock exam draws from every topic, like the real one.
Question 1
Which test uses X-rays or gamma rays to find internal discontinuities?
- Radiographic testing (RT)
- Ultrasonic testing (UT) with sound waves
- Hardness testing
- Visual testing
Show the answer
A. Radiographic testing (RT) — Radiation safety is essential.
Question 2
Which nondestructive test finds surface-breaking cracks on almost any non-porous material?
- Tensile testing
- Magnetic particle testing on aluminium
- Bend testing
- Liquid penetrant testing (PT)
Show the answer
D. Liquid penetrant testing (PT) — A dye seeps into cracks and is drawn out by a developer.
Question 3
Magnetic particle testing (MT) works only on which materials?
- Ferromagnetic materials such as carbon steel
- Copper
- Plastics and composites
- Aluminium
Show the answer
A. Ferromagnetic materials such as carbon steel — It finds surface and near-surface discontinuities.