Why is it important to maintain proper water levels in a boiler?

Maintaining proper water levels in a boiler is critical to preventing overheating, which can lead to serious damage or failure of the equipment. When water levels drop too low, the boiler's heating elements can become exposed, resulting in unchecked temperatures that may deform or rupture components, ultimately resulting in catastrophic failures. This overheating can also lead to boiler explosions, which pose safety risks to personnel and can cause extensive damage to the facility.

While the other options relate to various aspects of boiler operation, the prevention of overheating is paramount as it directly addresses both the safety of the boiler system and the integrity of its components. Fuel efficiency and proper steam generation are indeed influenced by water levels, but they are secondary to the critical safety concerns associated with overheating. Additionally, chemical treatment of water is important for maintaining water quality and preventing corrosion, but it does not directly impact the immediate dangers posed by improper water levels. Thus, the foremost concern remains the prevention of overheating to protect the boiler and ensure safe operation.