🔍 Key Concepts

• Governor speed droop: how final steady-state speed changes as load on the prime mover changes • Difference between permanent droop (steady-state characteristic) and temporary droop (transient behavior during load changes) • Relationship between load change, transient speed change, and final/steady speed

💭 Think About

• Ask yourself: for a governor with permanent droop, what happens to the final, stabilized speed when you increase load from no-load to full-load? Is it the same or different? • For temporary droop, think about whether the governor eventually brings the engine back to the original speed after the transient, or leaves it at a different steady speed. • Look carefully at which choices mix up the idea of "transient" (short-term response) versus "final/steady-state" (long-term response).

✅ Before You Answer

• Be clear on the definition of permanent droop: does the speed-load curve have a slope (different final speeds) or is it flat (same final speed)? • Be clear on the definition of temporary droop: is the speed change only during the transient, or is there a different speed at steady-state? • Eliminate any statement that says there are no transient speed changes when load changes, and any statement that contradicts the basic definitions of permanent vs temporary droop.