What is the primary function of a reservoir in the system?

• A. To store the system's oil supply
• B. To separate air from oil
• C. To control oil pressure in the system
• D. To collect contaminants

Answer: (A)

The primary function of a reservoir in a hydraulic system is to store the system's oil supply. This allows the system to have a readily available source of hydraulic fluid that can be drawn upon as needed during operation. The reservoir plays a crucial role in maintaining an adequate supply of fluid, which ensures that the hydraulic components, such as pumps and actuators, operate efficiently and effectively.

In addition to storage, reservoirs can also help manage the thermal expansion of the fluid, allow for the release of air or gases that might lead to cavitation in pumps, and provide a space for contaminants to settle before they can affect other system components, though these are secondary functions compared to the main role of storage.