🔍 Key Concepts

• Purpose of a hydraulic reservoir in a closed hydraulic system • What happens to air bubbles and contaminants in hydraulic oil when it sits undisturbed • How hydraulic systems maintain an adequate supply of fluid under varying operating conditions

💭 Think About

• Think about all the different things hydraulic fluid needs before it is pumped back into the system—what has to happen to the fluid while it is in the tank? • If air gets into hydraulic fluid, what problems can it cause, and where is the best place in the system for that air to be removed? • Where in the system would dirt or water in the fluid most likely be allowed to settle out, and why wouldn’t you want that happening in the lines or components?

✅ Before You Answer

• Which choice best describes all the major functions of a hydraulic reservoir, not just one function • Make sure you consider both storage and conditioning (cleaning/de-aerating) of the fluid • Ask yourself if any function listed in the answers would not logically occur in the reservoir; eliminate those options first