Answer:
1. Rotation of turbine.
2. Applying generator to covert mechanical energy to electrical energy.
Step-by-step explanation:
Rotation of turbine is common in all power plants and then applying generator to convert the mechanical energy of turbine to electrical energy. These two steps are common in all type of power plants.
The end processes such as waste disposal or filtration are different in different types of power plants.Like nuclear power plants waste management is different from the coal based power plant.
Cooling of water at the end is not practiced in hydro power plant.