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單項選擇題

In a pneumatic automation system, a unit producing a signal to govern the position of the controller of the measured variable, relative to the value of the measured variable, is said to have（）.

A.reset action
B.proportional action
C.two position action
D.rate action

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單項選擇題

In an automation system, the effect of a control action sensed by a controller is known as （）

A.command input
B.set point signal
C.output
D.feedback

單項選擇題

The value of the controlled variable, which under any fixed set of conditions the automatic controller operates to maintain, is known as （）

A.set point
B.control point
C.deviation
D.offset