Which of the following is NOT a type of radiation measured by a Primary Dosimeter?

The selection of X-ray radiation as the type that is not measured by a primary dosimeter is a bit misleading, as primary dosimeters are typically designed to measure various forms of ionizing radiation, including X-rays. Gamma radiation, neutron radiation, and beta radiation are all standard forms of radiation encountered in occupational settings, and dosimeters are specifically calibrated to measure these types effectively.

In a typical radiation monitoring context, primary dosimeters are utilized for their ability to quantify exposure to radiation types that can pose health risks to workers. This includes both gamma and beta radiation, which are common in many environments, as well as neutrons, which may be present in specific contexts such as nuclear power plants or research facilities.

The distinction here may stem from how some dosimeters are calibrated or used in practice, but it's important to recognize that primary dosimeters are indeed capable of measuring X-rays alongside other radiation types. Thus, identifying the nature of X-ray radiation in this context requires understanding the specific capabilities of various dosimeters and the environments they are used in.