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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