Question 151General Subjects - Assistant Engineer70% to pass
Which of the following statements is true concerning the application for an isochronous governor?
AI Explanation
The correct answer is D.
An isochronous governor is ideally suited for a ship's service alternator drive associated with maintaining a constant system frequency. This is because an isochronous governor is designed to maintain a constant rotational speed, which is necessary to ensure a stable and consistent electrical frequency for the ship's electrical system.
The other options are incorrect because an isochronous governor is not the ideal choice for a ship's geared propulsion drive (A), a pump drive (B), or a direct reversible propulsion drive (C). These applications typically require a different type of governor, such as a droop governor, to properly regulate the engine speed and maintain the desired performance characteristics.
Related Questions
#149 What is meant by the term "dead band" as it applies to prime mover speed control governors? #150 Concerning governor speed droop, what statement is true? #152 Which term represents how rapidly a speed control governor will complete a corrective action as the result of a load change? #153 Suppose a prime mover rotates at a steady speed of 900 rpm at rated full load and rotates at a steady speed of 1000 rpm at no load. Assuming that no adjustments have been made to the governor speed control setting, what is the speed regulation of the prime mover expressed in percent? #154 Which of the following speed control devices is used strictly as a safety device to prevent prime mover damage and acts by shutting down the prime mover?