Kentucky Boiler Practice Exam

What defines a power boiler?

1. Generates steam or vapor below 15 psig

2. Uses only hot water

3. Maintains a constant 15 psig pressure

4. Operates at or above 15 psig

The correct answer is: Generates steam or vapor below 15 psig

A power boiler is defined by its operating pressure and its function in generating steam. The correct definition emphasizes that a power boiler operates at or above a specific pressure threshold, which is 15 psig. This means that any boiler capable of producing steam or vapor at pressures greater than this level is categorized as a power boiler. This classification is crucial in understanding the types of boilers used in different industrial and commercial applications, as the operating pressure significantly impacts the efficiency and functionality of the steam generation process. Operating at or above 15 psig allows for the production of steam sufficient for driving turbines, heating applications, and various processes requiring high-pressure steam. The other choices do not accurately capture the definition of a power boiler, as they either refer to lower operating pressures or specific operational characteristics that fall outside the established criteria for classification as a power boiler.