Gas Fitter Practice Test

Before lighting a burner in a steam boiler, what must be ensured?

1. There is water in the boiler

2. The temperature controller is set properly

3. The main burner test firing valve is turned on

4. The safety valves are open

The correct answer is: There is water in the boiler

Ensuring that there is water in the boiler before lighting a burner is crucial for the safe operation of a steam boiler. Water is essential for the boiler to function correctly because it acts as a heat transfer medium and helps produce steam. If the burner is ignited without sufficient water, the boiler can overheat, which may lead to catastrophic failures such as a boiler explosion or damage to boiler components. This is because the heat generated by the burner needs to be absorbed by the water to prevent overheating of the boiler shell and other structural components. The presence of water in the boiler also allows for necessary pressure buildup, which is essential for steam generation. Always checking the water level ensures that the boiler operates within safe parameters, maintaining both efficiency and safety standards. Proper water levels are typically indicated by gauges on the boiler and should be monitored closely during operation.