In which NDT method is a viewing booth often used?

The use of a viewing booth is a characteristic feature of Radiographic Testing. This method involves the examination of components through the use of penetrating radiation, such as X-rays or gamma rays, to detect internal defects. The radiographs produced need to be interpreted, and viewing booths provide a controlled environment where these images can be analyzed in detail. The booths are designed to offer optimal lighting and often utilize a darkened setting to enhance the visibility of the film or digital radiograph. This allows for better detection of flaws such as cracks or voids within the material being tested.

In contrast, the other methods listed—Ultrasonic Testing, Electromagnetic Testing, and Liquid Penetrant Testing—do not involve the use of a viewing booth for interpretation in the same way. For instance, Ultrasonic Testing relies on sound waves and typically involves handheld devices or transducers for real-time analysis. Electromagnetic Testing utilizes electromagnetic fields and can often be performed directly on-site without the need for a specialized viewing area. Liquid Penetrant Testing involves applying a dye to the surface of the material and inspecting it visually, usually in natural light or under UV light, rather than through the use of a dedicated viewing booth.