What is statement is true concerning the term "isochronous" as it applies to prime mover speed control governors?

Correct Answer: Option C — Isochronous governors are able to maintain constant prime mover speed regardless of load by employing temporary speed droop.

Under USCG National Maritime Center examination standards, the accepted correct answer is: Isochronous governors are able to maintain constant prime mover speed regardless of load by employing temporary speed droop..