Gas Fitter Practice Test

Why is it important to have water in the boiler before lighting a burner?

1. It helps maintain pressure

2. To prevent overheating

3. To assist combustion

4. It is a regulatory requirement

The correct answer is: To prevent overheating

Having water in the boiler before lighting a burner is crucial primarily to prevent overheating. When a boiler is operated without sufficient water, the heat generated from the burner can cause the metal components of the boiler to reach dangerously high temperatures. This overheating can lead to metal fatigue, warping, or even catastrophic failure of the boiler structure. The presence of water ensures that the heat generated is absorbed effectively, allowing for safe and efficient operation. While maintaining pressure and regulatory requirements are important considerations, the immediate and critical reason for ensuring water in the boiler prior to operation relates to protecting the integrity and safety of the boiler by preventing overheating.