Question 147General Subjects - Assistant Engineer
70% to passWhat statement is true concerning the term "isochronous" as it applies to prime mover speed control governors?
AIsochronous governors are able to maintain constant prime mover load regardless of speed by employing temporary speed droop.
BIsochronous governors are able to maintain constant prime mover load regardless of speed by employing permanent speed droop.
CIsochronous governors are able to maintain constant prime mover speed regardless of load by employing temporary speed droop.
DIsochronous governors are able to maintain constant prime mover speed regardless of load by employing permanent speed droop.
AI Explanation
The correct answer is C. Isochronous governors are designed to maintain a constant prime mover speed regardless of load by employing temporary speed droop. This means that the governor will temporarily increase or decrease the fuel supply to the prime mover to compensate for changes in load, allowing the speed to remain constant. This is in contrast to non-isochronous governors, which allow the speed to vary with load changes. The other answer choices are incorrect because they describe the characteristics of non-isochronous governors, which are designed to maintain a constant load rather than a constant speed.
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