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Which of the following best describes the sensors designed to project and detect a light beam across an area?

A.
Smoke
Answers
A.
Smoke
B.
Thermal
Answers
B.
Thermal
C.
Air-aspirating
Answers
C.
Air-aspirating
D.
Photo electric
Answers
D.
Photo electric
Suggested answer: D

Explanation:

Reference: https://en.wikipedia.org/wiki/Photoelectric_sensor

asked 18/09/2024
Jucelino Pinheiro de Andrade da Silva
42 questions
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