Radiation Protection Practice Exam

The correct measurement equivalent to the Sievert is the REM. The Sievert is the SI unit used to measure the biological effect of ionizing radiation, particularly in terms of its potential health effects. The REM, or roentgen equivalent man, serves a similar purpose in the legacy system of units and is used to express the dose equivalent of radiation, taking into consideration the different levels of biological effectiveness of various types of radiation.

Both the Sievert and REM are used for dose equivalent measurements: they gauge the effective dose of radiation on human health. One Sievert is equivalent to 100 REM, providing a direct relationship between the two units. This means when assessing radiation exposure and its potential biological impacts, the REM is a historically significant unit that corresponds with the modern understanding illustrated by the Sievert.

Other options such as RAD, Curie, and Roentgen are used to measure different aspects of radiation. RAD pertains to absorbed dose, Curie measures radioactivity, and Roentgen refers to the amount of ionization produced in air by X-rays or gamma rays. Therefore, while these units are related to radiation measurements, they do not measure biological effect in the same way that REM and Sievert do, highlighting why REM is the appropriate equivalent