Question 427Motor Plants - Assistant Engineer

The correct answer is C) The compensating needle valve should be adjusted to stabilize operation. When a hydraulic governor has been refilled with oil, the engine should be operated until it reaches normal temperature. This allows the oil to circulate and any air in the system to be purged. Once the engine is at normal temperature, the compensating needle valve should be adjusted to stabilize the engine's operation and maintain consistent speed. The other options are incorrect because: A) Adjusting the rack position is not the correct step after refilling the hydraulic governor; B) Opening the compensating needle valve fully would not stabilize the engine's operation; and D) Adjusting the speed limiting device is not the appropriate action in this scenario.