Massachusetts Unrestricted Construction Supervisor License Practice Test

What is the maximum temperature that a flue lining used in residential-type appliances in a masonry chimney must withstand?

1. 1,200 degrees F

2. 1,500 degrees F

3. 1,800 degrees F

4. 2,000 degrees F

The correct answer is: 1,800 degrees F

The maximum temperature that a flue lining used in residential-type appliances in a masonry chimney must withstand is 1,800 degrees Fahrenheit. This temperature standard is crucial for ensuring the safe operation of fireplaces and other heating appliances, as it helps prevent overheating and the potential for chimney fires. Flue liners are designed to channel the byproducts of combustion safely out of the home, and they need to be robust enough to tolerate the high temperatures generated during combustion processes. Meeting this specific temperature requirement is essential for maintaining structural integrity and minimizing risks associated with excessive heat exposure. As for other temperature thresholds mentioned, they exceed the necessary maximum for residential applications, which can lead to unwarranted costs and engineering considerations without providing added benefits.