The hand wheel used to adjust the turbine speed on the governor is known as the:

• A. Speeder
• B. Driver
• C. Setter
• D. Throttle

Answer: (A)

In this context, the device a operator uses to set the turbine’s target speed is called the speeder. Turning the hand wheel on the governor changes the reference speed the governor aims to maintain. When you adjust the speeder, you’re telling the governor to run the turbine a bit faster or slower, and the governor then modulates the steam flow through the valve train to reach that new speed. The throttle controls the actual steam flow, but the hand wheel itself is the speeder that sets the desired speed.