True or false: Nozzle governing is only used on impulse turbines.

Nozzle governing is primarily associated with impulse turbines because it directly relates to controlling the flow of steam or fluid through the turbine's nozzles to govern its speed and output power. In impulse turbines, the steam expands through stationary nozzles and strikes the turbine blades, which are designed to change the direction of the flow while causing rotation.

Although nozzle governing is vital for impulse turbines, it is not exclusively limited to them. Other turbine types, such as reaction turbines, may utilize different governing mechanisms, like variable blades or throttle valves. Thus, stating that nozzle governing is only used on impulse turbines is not entirely accurate, as there are other methods of governing utilized in various turbine designs.

This understanding reveals that the answer provided assumes an overly simplistic view of turbine operation, neglecting the broader range of governing techniques applied in power engineering. In this context, the appropriate response would be false, reflecting the fact that while nozzle governing is crucial for impulse turbines, it is not the sole governing method used across all turbine types.