What are the key devices of a closed-loop system?

What will be an ideal response?


The key devices are the sensor, comparator, controller, power control and amplification devices, and the actuator.

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What happens to the magnitude of the impedance of a capacitor when the input frequency increases?

A. it stays the same B. it increases C. it decreases

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The shelf life of oxygenated fuels is about ________ days

A) 90 B) 10 C) 9 D) 900

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The major safety concern with R-410A compared to most other common refrigerants is that:

A) R-410A is flammable. B) R-410A is toxic. C) R-410A operates at much higher pressures. D) R-410A is chemically unstable.

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Bleeding is complete when a stream of fluid free of air bubbles flows from the bleeder screw

Indicate whether the statement is true or false

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