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21. In a control system using a variable frequency drive, the speed of the load is manually controlled by an operator using a dial on the control system. This is an example of ? control. Oa. closed-loop Ob. open-loop Oc. ramp-down Od. ramp-up

21. In a control system using a variable frequency drive, the speed of the load is manually controlled by an operator using a dial on the control system. This is an example of ? control. Oa. closed-loop Ob. open-loop Oc. ramp-down Od. ramp-up

Introductory Circuit Analysis (13th Edition)
Introductory Circuit Analysis (13th Edition)
13th Edition
ISBN:9780133923605
Author:Robert L. Boylestad
Publisher:Robert L. Boylestad
Chapter1: Introduction
Section: Chapter Questions
Problem 1P: Visit your local library (at school or home) and describe the extent to which it provides literature...
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21. In a control system using a variable frequency drive, the speed of the load is manually controlled by an operator using a dial on the control system. This is an example of ? control. Oa. closed-loop Ob. open-loop Oc. ramp-down Od. ramp-up
Transcribed Image Text:21. In a control system using a variable frequency drive, the speed of the load is manually controlled by an operator using a dial on the control system. This is an example of ? control. Oa. closed-loop Ob. open-loop Oc. ramp-down Od. ramp-up
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