What type of governors are primarily used in turbines?

Mechanical centrifugal governors are primarily used in turbines due to their efficiency and reliability in regulating speed. These governors utilize centrifugal force to adjust the fuel flow or steam input to the turbine based on the rotational speed. As the speed of the turbine increases, the centrifugal force on the governor's mechanism increases, which then causes adjustments in the fuel or steam supply to maintain a consistent operational speed.

This type of governor is well-suited for applications involving high-speed rotating machinery, such as turbines, because they are robust and can handle the dynamic operational conditions inherent in such systems. They provide a simple and effective means of automatic speed regulation without the complexity of additional control systems required by other governor types.

Other options like pneumatic, electronic, and hydraulic governors may also be used in various applications, but mechanical centrifugal governors are traditionally favored in turbine applications due to their directness and simplicity in responding to changes in speed.