In which type of turbine would you find bypass or overload governing being used?

Bypass or overload governing is a control strategy used to manage the output and performance of turbines, which is applicable to both impulse and reaction turbines. In impulse turbines, such as the Pelton wheel, governing can be achieved through the diversion of water flow to maintain a constant speed despite fluctuations in load. This is critical because it allows the turbine to handle varying demand without losing efficiency or risking damage due to excessive speed.

In reaction turbines, such as Francis and Kaplan turbines, governing is also vital but operates differently. These turbines typically adjust the flow of water entering the turbine to control speed and load capacity, utilizing mechanisms like wicket gates to regulate the flow accordingly.

The use of bypass or overload governing in both types of turbines ensures optimal performance, improved efficiency, and protects against overspeed conditions, thus making this governing method applicable to both types.