A controller output is a 5 to 25mA signal that drive a valve to control flow. The relation between current and flow is Q=40[I - 2mA]¹/2 L/min. What is the flow for 12mA? What current produces a flow of 140 L/min?

A controller output is a 5 to 25mA signal that drive a valve to control flow. The relation between current and flow is Q=40[I - 2mA]¹/2 L/min. What is the flow for 12mA? What current produces a flow of 140 L/min?

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter26: Applications Of Refrigeration Systems

Section: Chapter Questions

Problem 16RQ: A(n)_______varies the frequency of an electronically altered sine wave, which affects the speed of...

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Concept explainers

Strain Gauges

All the components used in civil engineering and mechanical engineering applications undergo deformations due to induced internal stresses under the application of external loads. Under repeated application of loads, there is a high possibility of failure of the components. Hence, periodic monitoring of the components and determination of stresses are very important.

Question

A controller output is a 5 to 25mA signal that drive a valve to control flow. The relation
between current and flow is Q=40[I - 2mA]¹/2 L/min. What is the flow for 12mA? What
current produces a flow of 140 L/min?

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