The control-circuits of most process or other utilization equipment depend on four factors or mediums that either control the equipment or the equipment controls them.
These factors or mediums include position, pressure, temperature, and time.
The devices used to sense the mediums are normally 2-wire switching devices, which are further described as __________ devices.
A) pilot
B) control
C) remote
D) sensing
Show Answer
Answer:A
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