Question 480Motor Plants - Assistant Engineer70% to pass
If the speeder spring of a main propulsion diesel engine governor breaks while operating at full load, the engine RPM will_______________.
AI Explanation
The correct answer is C) decrease to a slightly lower value.
When the speeder spring of a main propulsion diesel engine governor breaks, the engine's RPM will decrease to a slightly lower value. This is because the speeder spring is responsible for maintaining the engine's desired operating speed. With the speeder spring broken, the governor's ability to maintain the engine's RPM at the set value is compromised, causing the RPM to decrease slightly.
The other options are incorrect because: A) the engine would not increase to the point of activating the overspeed trip, as the governor is still functional, albeit with a broken speeder spring; B) the engine would not hunt, as the governor would stabilize the RPM at a slightly lower value; and D) the RPM would not remain the same, as the broken speeder spring would affect the governor's ability to maintain the set RPM.
Related Questions
#478 Corrosion and grooving on the blading of an exhaust driven turbocharger is caused by certain components of residual fuel oils. These components are vanadium, sodium, and _______________. #479 Excessive mechanical and pulsating vibrations developed in a main propulsion diesel engine may be more likely to cause damage to an attached _______________.#481 The hunting of a diesel engine may be caused by _______________.#482 If the operating speed of a diesel engine increases without an apparent change in the engine control settings, you may suspect a _______________.#483 Governor hunting is caused by _______________.