ASNT Industrial Radiography Radiation Safety Practice Test

Which type of survey meter is most suitable for industrial radiography applications?

1. Ionization chamber

2. Geiger-Muller tube

3. Scintillation detector

4. Film badge

The correct answer is: Geiger-Muller tube

In industrial radiography applications, the Geiger-Muller tube is particularly suitable for detecting ionizing radiation such as gamma and beta particles. One of the main advantages of this type of survey meter is its ability to provide real-time feedback on radiation levels, making it easier for radiographers to monitor their exposure while working in or near radiation zones. The Geiger-Muller tube is known for its sensitivity to low levels of radiation, which is critical in environments where exposure can be variable and potentially hazardous. Additionally, it produces audible clicks or visual indicators when radiation is detected, which helps in alerting users to potentially unsafe levels. This feature is especially important in the fast-paced and often complex environments of industrial radiography, where personnel must remain vigilant about their radiation exposure. Other options, such as the ionization chamber, are also used for measuring radiation but typically provide better accuracy for higher radiation fields rather than the low-level detection best suited for monitoring personnel exposure in real-time. Scintillation detectors are highly sensitive and provide improved energy discrimination but can be more expensive and less portable than Geiger-Muller tubes, making them less practical for routine industrial radiography surveys. Film badges, while useful for monitoring cumulative radiation exposure, do not provide immediate results and therefore