ASNT Radiographic Testing (RT) Level II Practice Test 2025 – Your All-In-One Resource for Exam Success!

Using a grid in radiographic testing primarily serves to enhance the contrast of the image. Grids are designed to absorb scatter radiation generated when X-rays interact with the subject being imaged. Scatter radiation can contribute to a fogging effect on the radiographic image, which decreases contrast and makes it difficult to distinguish between different areas of the image. By placing a grid in the path of the X-rays, the useful primary rays pass through while much of the scattered radiation is absorbed. This results in a clearer and more defined image with improved contrast, allowing for better identification of defects or features within the tested material.

The other options, while related to aspects of radiographic testing, do not accurately represent the primary role of a grid. Grids do not increase X-ray intensity; instead, they selectively filter out scatter while allowing primary rays to pass. They do not inherently reduce radiation exposure to the film in a direct manner, as their purpose is not to reduce the amount of radiation, but to improve the quality of the image. Finally, grids do not focus the beam; their function is to enhance image quality through scatter reduction rather than altering the beam's focus.