🔍 Key Concepts

• Hydraulic reservoirs functions: cooling, deaeration (air removal), and allowing contaminants and water to settle out • How fluid level affects exposure of inside walls to air and moisture • What happens to temperature and fluid life when reservoir volume is too low

💭 Think About

• Think about what happens inside the reservoir when the fluid level is low: which surfaces are exposed and what can form there? • How does having more or less fluid volume affect how fast the oil heats up and how often it breaks down and needs changing? • If a manufacturer specifies a “normal” level, which of the listed problems is that level mainly intended to prevent?

✅ Before You Answer

• Identify which option is most directly controlled by keeping the fluid at the correct height, not just slightly influenced • Consider which effect is most immediate and practical for day‑to‑day maintenance of hydraulic systems • Ask yourself if any choice is too broad (trying to cover everything) compared with the specific purpose of a proper reservoir level