G2 Gas Fitter Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Prepare for the G2 Gas Fitter Test. Study using flashcards and multiple choice questions, with hints and detailed explanations for each question. Ensure your success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

Which component primarily prevents a gas burner from igniting without sufficient water in the boiler?

Safety valve
Low water cut-off device
Flame sensor
Pressure relief valve

The correct answer is: Low water cut-off device

The low water cut-off device is specifically designed to prevent a gas burner from igniting when there isn't sufficient water in the boiler. This component plays a critical safety role as it monitors the water level within the boiler. If the water level drops below a certain threshold, the device automatically shuts off the gas supply to the burner. This prevents overheating and potential damage to the boiler, as well as the risk of a fire hazard. In contrast, other components serve different functions. The safety valve is primarily responsible for relieving excess pressure within the boiler, while the flame sensor detects the presence of a flame to ensure proper combustion. The pressure relief valve also serves to release excess pressure but does not specifically manage water levels. Thus, the low water cut-off device is crucial for safe boiler operation regarding the water content.