Welding and NDT Engineer Interview Questions and Answers

WPS stands for Welding Procedure Specification, while PQR stands for Procedure Qualification Record. WPS is a document that provides necessary information for welding, while PQR is a record of the welding parameters used during qualification testing.

• WPS is a detailed document that specifies all the necessary parameters for a specific welding job, such as materials, welding process, joint design, etc.

• PQR is a record of the actual welding parameters used during the qualificatio...read more

To make a Welding Procedure Specification (WPS) with reference to codes, one must follow the guidelines provided by the relevant welding codes and standards.

• Understand the requirements of the specific welding code being used (e.g. AWS D1.1, ASME Section IX)

• Identify the essential variables for the welding process (e.g. material type, thickness, welding position)

• Select the appropriate welding process, filler metal, preheat and interpass temperature based on the code requirement...read more

Acceptance criteria of radiography refers to the standards and requirements that must be met for a radiographic image to be considered acceptable.

• Radiographic images should have proper density and contrast for clear visualization of defects.

• The image should show all required areas of the weld with no uninterpretable areas.

• The image should be free from artifacts that could obscure or mimic defects.

• The image should meet specified codes and standards such as ASME, AWS, or API.

• Ac...read more

IQI stands for Image Quality Indicator, used in radiographic testing to determine the quality of the image produced.

• IQI is a tool used in radiographic testing to ensure the quality of the image produced.

• It consists of a series of patterns or objects with varying thicknesses and densities.

• The IQI is placed on the object being tested before the X-ray or gamma ray exposure.

• The resulting image is then compared to a standard image to determine if the quality meets the required sta...read more