Which detector contains radioactive material?

Prepare for the First Responder Inspector Test. Utilize sample tests, detailed explanations, and interactive flashcards to boost your confidence and knowledge. Get exam-ready!

Multiple Choice

Which detector contains radioactive material?

Detectors that contain radioactive material are ionization detectors. They use a small sealed radioactive source inside a gas-filled chamber with electrodes. The radiation ionizes the gas, creating free ions and electrons that produce a steady current. When smoke or other particles enter the chamber and disrupt the ions, the current changes, signaling detection. The other detector types rely on optical methods (light scattering or obscuration) or air sampling to sense contaminants and do not depend on a radioactive source, so they don’t contain radioactive material as part of their sensing mechanism.

Detectors that contain radioactive material are ionization detectors. They use a small sealed radioactive source inside a gas-filled chamber with electrodes. The radiation ionizes the gas, creating free ions and electrons that produce a steady current. When smoke or other particles enter the chamber and disrupt the ions, the current changes, signaling detection. The other detector types rely on optical methods (light scattering or obscuration) or air sampling to sense contaminants and do not depend on a radioactive source, so they don’t contain radioactive material as part of their sensing mechanism.

More practice questions