What range must a survey meter be capable of measuring?

The correct answer is that a survey meter must be capable of measuring in the range of 2 to 1000 mR/h. Survey meters are essential instruments used in radiation safety to measure and monitor external radiation exposure. This range is appropriate for detecting various radiation levels commonly encountered in different environments, such as medical facilities, nuclear power plants, or research laboratories.

The lower part of the range, starting at 2 mR/h, allows for the detection of low-level radiation, which is crucial in environments where minor exposures must be monitored to ensure safety. The upper limit of 1000 mR/h is necessary for situations where high radiation levels may occur, allowing safety personnel to identify hazardous conditions quickly.

Other ranges presented in the options may not cover the broad spectrum of radiation levels that workers might encounter, making them less suitable for comprehensive radiation safety monitoring. Thus, having a survey meter capable of measuring from 2 to 1000 mR/h ensures adequate safety measures can be implemented across various radiation environments.