4th Class Power Engineering 4A9 Practice Test

A turbine functions in a power plant primarily by converting steam energy into mechanical energy. In the context of steam turbines, steam generated from boiling water is directed into the turbine blades. The high-pressure steam expands and moves through the turbine, causing the blades to rotate. This rotation converts the thermal energy from the steam into mechanical energy, which can then be used to drive generators that produce electrical energy.

This process is fundamental in thermal power plants, where various fuels are burned to heat water, producing steam. The effectiveness of this conversion process is what allows for energy generation, and the design of the turbine plays a critical role in maximizing efficiency and output. Thus, the correct answer addresses the essential function of the turbine in transforming thermal energy into a form that can be harnessed for power generation.