In the case and duct system the air distribution mode doors may be operated by all of the following Except:
A) Potentiometers
B) Electrically powered motors
C) Cable
D) Vacuum motors

Question

Quizplus · Accepted Answer

Potentiometers are not typically used to operate air distribution mode doors in the case and duct system. Potentiometers are electronic components used for measuring and controlling the electrical potential, typically used in applications such as volume control on amplifiers or as a sensor in various electronic systems. Meanwhile, electrically powered motors, cables, and vacuum motors are all commonly used to operate air distribution mode doors.

In the Case and Duct System the Air Distribution Mode