Alarm-sounding devices that trigger when smoke particles either scatter or obscure light are called:
A)single-station smoke detectors.
B)ionization smoke detectors.
C)photoelectric smoke detectors.
D)smoke dampers.

Question

Quizplus · Accepted Answer

Photoelectric smoke detectors trigger an alarm when smoke particles scatter or obscure light. Single-station smoke detectors are a general term for any smoke detector intended for use in a single location, while ionization smoke detectors operate by detecting smoke particles through ionization. Smoke dampers are mechanical devices used to prevent smoke from spreading through a building's HVAC system.

Alarm-Sounding Devices That Trigger When Smoke Particles Either Scatter or Obscure