Utility boilers are primarily used to produce?

Utility boilers are designed to produce high-pressure steam that is primarily used to drive turbines in power generation. This high-pressure steam is essential for converting thermal energy into mechanical energy, which ultimately generates electricity. The efficiency and output of utility boilers are crucial for meeting the energy demands of power plants.

In contrast, while some steam systems are utilized for heating (as in option A), utility boilers focus on producing steam at high pressures required specifically for turbine operations. Options C and D address other functions that might occur in industrial or residential settings, such as manufacturing processes or condensate recycling, but these are not the primary role of utility boilers. Hence, recognizing the specific application of utility boilers in electricity generation helps clarify why the production of high-pressure steam for driving turbines is the correct answer.