Red Seal Gasfitter — Class B Practice Exam

What is a manifold in a gas system?

1. A device that distributes gas to multiple appliances from a single source

2. A type of gas regulator for pressure control

3. A section of piping used to connect gas appliances

4. A tool for detecting gas leaks

The correct answer is: A device that distributes gas to multiple appliances from a single source

A manifold in a gas system serves as the critical component that distributes gas to multiple appliances from a single gas source. This allows for an organized and efficient connection where a single supply line can lead to various gas-consuming devices, such as furnaces, water heaters, or stoves. The design of the manifold ensures that each connected appliance receives the correct amount of gas necessary for safe and efficient operation. By centralizing the distribution point, a manifold helps maintain consistent gas pressure and flow, preventing potential issues that could arise from individual supply lines. The other options do have relevant functions in a gas system, but they do not define a manifold. A gas regulator is specifically designed to control the pressure of the gas, a section of piping connects appliances in a system but is not exclusive to the manifold's distribution role, and a tool for detecting gas leaks is used for safety maintenance rather than distribution. Thus, the definition and function of a manifold primarily align with the distribution of gas to various appliances, making it the correct answer.