🔍 Key Concepts

• Speed droop of a governor: how much RPM falls from no‑load to full‑load for each engine • How parallel generators must run at the same speed/frequency when sharing load • The relation between steeper droop curve and how much extra load that engine will or will not pick up when paralleled at the same initial no‑load speed

💭 Think About

• Look at the slopes of the lines labeled Engine "A" and Engine "B". Which engine’s speed drops more between no load and full load? • If both engines are forced to stay at the same speed while operating in parallel, what happens to the engine that wants to slow down more as load increases? Will it naturally try to take more load or shed load? • From the diagram, compare the full‑load speeds each engine would have if running alone. Which one would run at the higher RPM at full load, according to its droop line?

✅ Before You Answer

• Identify which engine has greater droop (steeper downward slope) on the diagram. • Decide whether an engine with greater droop will carry more or less load when it must match speed with a stiffer (less droop) engine in parallel. • Verify from the droop lines which engine’s full‑load RPM when operating alone is higher or lower before judging options B and D.