Building Automation Lesson 4 Lighting System Control Devices
Study online at https://quizlet.com/_bwhu45
1. What types of devices are used for control Input
devices in lighting systems? Output
2. What is the most common form of automatic Occupancy sensors
lighting control used in buildings?
3. What technologies are used in occupancy a.Microwave
sensors to sense people within a space? b.Passive infrared
c.Ultrasonic
4. What type of occupancy sensor activates Infrared
when it senses the heat energy of people
within its field of view?
5. An ultrasonic occupancy sensor emits False,
high-power, low-frequency sound waves and An ultrasonic occupancy sensor emits
listens for a phase shift in the reflected sound low-power, high-frequency sound waves
returning to the sensor, which indicates a and listens for a phase shift in the reflect-
moving target. ed sound returning to the sensor, which
indicates a moving target.
6. Which of the following is a common type of Photoresistor
photocell? Phototransistor
7. Instead of having a third terminal used for light
electronic control signals like most transis-
tors, phototransistors use ? as the control
input.
8. Phototransistors are becoming more com- T
mon than photoresistors because silicon is
more resistant to high temperatures and air-
borne contamination. This makes it ideal for
1/5
, Building Automation Lesson 4 Lighting System Control Devices
Study online at https://quizlet.com/_bwhu45
new outdoor lighting control applications or
to replace failed photoresistors.
9. A control system in which the result of an fed back into a controller
output is ? as an input defines closed loop
control.
10. Open-loop control Identify the type of control application
used.
11. Closed-loop control Identify the type of control application
used.
12. Closed-loop control Identify the type of control application
used.
13. Open-loop control Identify the type of control application
used.
2/5
Study online at https://quizlet.com/_bwhu45
1. What types of devices are used for control Input
devices in lighting systems? Output
2. What is the most common form of automatic Occupancy sensors
lighting control used in buildings?
3. What technologies are used in occupancy a.Microwave
sensors to sense people within a space? b.Passive infrared
c.Ultrasonic
4. What type of occupancy sensor activates Infrared
when it senses the heat energy of people
within its field of view?
5. An ultrasonic occupancy sensor emits False,
high-power, low-frequency sound waves and An ultrasonic occupancy sensor emits
listens for a phase shift in the reflected sound low-power, high-frequency sound waves
returning to the sensor, which indicates a and listens for a phase shift in the reflect-
moving target. ed sound returning to the sensor, which
indicates a moving target.
6. Which of the following is a common type of Photoresistor
photocell? Phototransistor
7. Instead of having a third terminal used for light
electronic control signals like most transis-
tors, phototransistors use ? as the control
input.
8. Phototransistors are becoming more com- T
mon than photoresistors because silicon is
more resistant to high temperatures and air-
borne contamination. This makes it ideal for
1/5
, Building Automation Lesson 4 Lighting System Control Devices
Study online at https://quizlet.com/_bwhu45
new outdoor lighting control applications or
to replace failed photoresistors.
9. A control system in which the result of an fed back into a controller
output is ? as an input defines closed loop
control.
10. Open-loop control Identify the type of control application
used.
11. Closed-loop control Identify the type of control application
used.
12. Closed-loop control Identify the type of control application
used.
13. Open-loop control Identify the type of control application
used.
2/5
