Gas Fitter Practice Test

What characteristic describes a fire tube boiler?

1. Water outside the tubes and flue gases outside

2. Water inside the tubes and flue gases outside

3. Water inside the tubes and water outside

4. Water outside the tubes and flue gases inside

The correct answer is: Water outside the tubes and flue gases inside

A fire tube boiler is characterized by having water surrounding the tubes, where the flue gases flow through the tubes themselves. In this arrangement, the heat generated from the combustion process within the flue gases heats the water within the boiler. This configuration allows for efficient heat transfer from the flue gas to the water, facilitating the conversion of water into steam or heated water for industrial, commercial, or residential use. The design of fire tube boilers typically prioritizes safety and efficiency, as the flue gases are confined within the tubes, reducing the chance of direct contact with the water, thus ensuring a more controlled heating process. This method of heating is common in various applications, making fire tube boilers a popular choice in the industry.