Gas Fitter Practice Test

Where would you typically install a surge limiting device?

1. High pressure gas pipe

2. Top of an expansion tank

3. Regulator

4. Domestic gas refrigerator

The correct answer is: Regulator

The typical installation of a surge limiting device is at the regulator. The primary role of a surge limiting device is to protect downstream equipment from pressure spikes or surges that may occur in a gas system. By placing it at the regulator, the device can effectively monitor and mitigate excessive pressure coming through the gas line before it reaches appliances or other components of the system. Regulators are crucial in controlling the pressure of gas supplied to appliances, ensuring they operate safely and effectively. An unexpected surge in pressure could damage sensitive appliances or create safety hazards. Therefore, integrating the surge limiting device at this point helps ensure that pressure remains within safe operational limits throughout the entire system. The other locations mentioned are not ideal for such installations. For instance, a high pressure gas pipe is already designed to handle certain pressures and does not require a surge limiting device in the same way a residential appliance connected downstream might. The top of an expansion tank is related more to water systems than gas and does not involve controlling gas pressure. Meanwhile, a domestic gas refrigerator is designed to operate under specific gas pressures and would benefit from regulation but not necessarily from a surge limiting device directly at the appliance itself.