Question 180General Subjects - Assistant Engineer

The correct answer is D) act as a base or foundation for the power unit. The reservoir in a hydraulic system aboard a ship serves as a base or foundation for the power unit, which typically includes the hydraulic pump and motor. The reservoir provides a stable platform for these components and helps to ensure their proper operation. It also allows for the storage of hydraulic fluid, which is necessary for the system to function. The other options are incorrect because they do not accurately describe the primary purpose of the reservoir in a hydraulic system. While the reservoir may help to eliminate pressure surges (A) and maintain the stored oil under pressure (B), these are not its primary functions. Additionally, the reservoir does not act as a shock absorber (C) in the system.