Get Steamy with the Class 5 Boiler Exam 2025 – Ignite Your Career Potential!

The correct answer identifies the three phases of water relevant to boiler operation as liquid, vapor (steam), and superheated vapor.

In the context of a boiler system, water first exists in its liquid form, which is necessary for heating and turning into steam. As the water is heated, it reaches the boiling point and transitions into vapor or steam, which is essential for producing power or heating. Further heating of the steam leads to the superheated vapor phase, where the steam is heated beyond its boiling point, increasing its energy content and efficiency for work in various applications such as turbines or heating processes.

The combination of these phases reflects the critical processes involved in a boiler's operation, where understanding the distinctions and transitions between them is crucial for effective boiler management and efficiency. This understanding aids operators in optimizing performance and safety.

While other options mention phases or states of matter, they do not relate specifically to the operational phases of water within a boiler system, making them less relevant in this context.