Massachusetts 2nd Class Fireman's Practice Exam 2025 - Free Fireman License Practice Questions and Study Guide

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Superheated steam is:

reheated steam

Superheated steam is best defined as steam that has been heated beyond its saturation temperature at a given pressure. It is not simply reheated steam, but rather steam whose temperature is increased after it has already reached the saturation point, allowing it to remain in the vapor phase without the presence of liquid water. This means that superheated steam can carry more energy and as a result, it is often used in applications like steam turbines where increased thermal efficiency is desired.

Reheating steam does describe part of the process, but it does not fully capture the primary distinction of superheated steam from saturated steam. Therefore, while reheated steam can contribute to understanding superheated conditions, the defining characteristic of superheated steam is its temperature being elevated above saturation, which enhances its heat-carrying capacity and efficiency in applications.

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very hot steam

flash steam

saturated steam

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