Radiography (x-ray) Testing

Question 1

What are uses of x-ray testing?

Answer 1

This is a test generally used to find internal flaws in materials. It is used to check the quality of welds, for example, to find voids or cracks.

Question 2

Explain, in detail the steps taken during radiography testing (4)

Answer 2

1. The x-rays are released by heating the cathode.
2. They are then accelerated by the D.C. (direct current) current and directed onto the piece by the tungsten anode.
3. The x-rays then pass through the test piece onto an x-ray film which displays the results.
4. The x-rays cannot pass through the faults as easily making them visible on the x-ray film.

Question 3

List some safety precautions for x-ray testing (4)

Answer 3

1. Shielding
   Use appropriate shielding at all test sites to on all persons.
2. Distance
   Maintain adequate distance between radioactive sources and persons.
3. Duration
   Minimise time spent near or within radiation fields.
4. Quantity
   Utilize the smallest amount of radioactive material as possible to accomplish the job at hand.