G2 Gas Fitter Practice Exam

What should the ignition trial time be for a safe main burner startup?

1. Three seconds

2. Five seconds

3. One second

4. Ten seconds

The correct answer is: One second

The ignition trial time for a safe main burner startup is typically set at one second. This timeframe is critical to ensure that the gas has a sufficient opportunity to ignite without accumulating excessive amounts of unburned gas, which could pose a safety hazard. During this brief period, the ignition source should capitalize on the presence of a suitable mixture of gas and air, ideally leading to a prompt ignition. If the burner does not ignite within this timeframe, it indicates a need for further investigation to determine potential issues such as faulty ignition components or gas flow problems. The one-second trial is a standard adopted in many safety protocols to minimize risks associated with delayed ignition, while longer ignition trials might increase the chance of gas accumulating, making ignition more hazardous. This is why the choice of one second aligns with safety guidelines and operational efficiency.