G2 Gas Fitter Practice Exam

What is the purpose of a branch line in a piping system?

1. To connect multiple appliances to a main supply

2. To supply gas from the main supply piping to appliances

3. To vent flue gases outside

4. To act as a pressure regulator in the system

The correct answer is: To supply gas from the main supply piping to appliances

The purpose of a branch line in a piping system is to supply gas from the main supply piping to appliances. In a gas distribution system, the main supply line delivers gas under pressure to various branch lines, which then direct that gas specifically to individual appliances such as heaters, stoves, or dryers. This configuration allows for both efficiency and flexibility in supplying gas to multiple points of use while ensuring that each appliance receives the correct amount of gas. The branch line is essential for maintaining proper flow and pressure to the appliances, which are typically located at different points throughout a building or facility. By using branch lines, the system can effectively manage the distribution of gas to meet the varying demands of each appliance without compromising the overall function of the gas supply network.