🔍 Key Concepts

• Carefully compare standard hydraulic schematic symbols for a pump, heat exchanger, and filter with the symbols shown in illustration GS-0041. • Note how a variable displacement pump is drawn differently from a fixed displacement pump (look for an adjustment/tilt or control element). • Identify the typical filter symbol in hydraulic diagrams (often a diamond‑shaped or similar element in the return or pressure line).

💭 Think About

• Which labeled elements in the lower part of the diagram look like a pump driven by a motor, and does that pump symbol indicate variable displacement? • Do you see any symbol that clearly represents a heat exchanger (usually showing two separate flow paths exchanging heat, often with crossing or parallel lines)? • Can you locate a symbol that matches a filter, and if so, is there any sign anywhere of a heat exchanger symbol at all?

✅ Before You Answer

• Verify whether a variable displacement pump symbol (with control/adjustment marking) is actually present, not just any pump. • Check explicitly if a recognizable heat exchanger symbol appears anywhere; if you cannot clearly find one, do not assume it is there. • Confirm that a filter symbol is present and correctly identified before considering choice D) All of the above.