Kentucky Boiler Practice Exam

What is a pressure vessel?

1. A vessel in which pressure is released

2. A vessel that contains pressure from external sources

3. A standard storage container for liquids

4. A vessel for high-temperature cooking

The correct answer is: A vessel that contains pressure from external sources

A pressure vessel is specifically designed to hold gases or liquids at a pressure substantially different from the ambient pressure. This definition encompasses vessels that contain fluids under high pressure, indicating that the contents are maintained at a pressure greater than that of the surrounding environment. In the context of the options provided, the choice reflecting a vessel containing pressure from external sources accurately captures the essence of a pressure vessel’s function. It emphasizes the distinction between a pressure vessel and standard containers, which might not be built to withstand significant pressure differences. Other choices misinterpret the function of a pressure vessel. For instance, while a vessel that releases pressure may be relevant in discussing certain safety mechanisms related to pressure management, it does not define the primary purpose of a pressure vessel. Likewise, a standard storage container for liquids does not account for the pressure aspect, nor does a high-temperature cooking vessel necessarily imply that it operates under high pressure. Thus, the selected answer clearly aligns with the technical definition and operational understanding of what a pressure vessel entails.