Which of the following is an abbreviation of a Non-destructive test?

The abbreviation "UT" stands for Ultrasonic Testing, which is a widely used non-destructive testing (NDT) method. Ultrasonic Testing involves sending high-frequency sound waves into a material to detect internal flaws, measure thickness, and ensure the integrity of the material. This technique is highly effective for identifying defects that are not visible on the surface.

Ultrasonic Testing is favored in various industries due to its ability to provide accurate and detailed information about a material's structure without causing any damage. This non-invasive approach is essential for maintaining safety and ensuring the reliability of components in critical applications, such as in aerospace, automotive, and manufacturing sectors.

In contrast, the other listed abbreviations represent different non-destructive testing methods: RT stands for Radiographic Testing, MT stands for Magnetic Particle Testing, and PT stands for Liquid Penetrant Testing. Each of these methods has its unique applications and principles, but in this question, "UT" specifically highlights the technique of using sound waves for inspection.