🔍 Key Concepts

• Constant speed hydraulic governor – what it is designed to control • Which of the listed machines must normally run at very steady speed for proper operation • Relationship between prime mover speed and frequency/voltage or pump output

💭 Think About

• Ask yourself which of these pieces of equipment must keep its shaft speed essentially constant for the rest of the system to work correctly • Consider which item is driving something that is very sensitive to speed changes (for example, electrical frequency or precision timing) • Think about whether small speed variations would be acceptable or unacceptable for each of the four choices

✅ Before You Answer

• For each choice, decide: does this machine absolutely require constant RPM during normal operation? • Identify which of the four is most closely associated with power generation at fixed frequency • Eliminate the options where flow or capacity can safely vary without causing serious system problems