Gas Fitter Practice Test

A pilotstat will de-energize after how many seconds?

1. 0.8 seconds

2. 10 seconds

3. 90 seconds

4. 4 seconds

The correct answer is: 90 seconds

The pilotstat is a safety device commonly used in gas systems to monitor and control the gas flow. It functions by detecting if a pilot light has gone out. In the event that the pilot flame is extinguished, the pilotstat will automatically shut off the gas supply to prevent any potential hazards such as gas leaks or explosions. In this context, the correct choice indicates that the pilotstat will de-energize after 90 seconds. This duration is significant because it allows for a reasonable amount of time for the pilot light to relight itself. If the pilot light fails to reestablish after this preset time, the pilotstat will trigger a shutdown of the gas flow, ensuring safety protocols are maintained. Having a designated delay time of 90 seconds is critical in applications where brief interruptions in flame are common, such as during ignition or where transient conditions might occur. This timeframe minimizes unnecessary shutdowns while also safeguarding against any prolonged risks associated with a failed pilot light. Thus, this de-energizing time reflects an optimal balance between safety and system functionality.