Minnesota Special Engineer Boiler License Practice Exam

Where is a pyrometer typically located in relation to a boiler?

1. Inside the boiler drum

2. In the water feed line

3. In the exhaust gases leaving the boiler

4. Near the burner assembly

The correct answer is: In the exhaust gases leaving the boiler

A pyrometer is a type of device used to measure high temperatures, typically found in industrial applications involving heating equipment such as boilers. When considering the layout and function of a boiler, the correct placement of a pyrometer is in the exhaust gases leaving the boiler. This is because the pyrometer provides crucial information about the temperature of the flue gases, which is important for both efficiency and safety. Monitoring the temperature of the exhaust gases allows operators to assess the performance of the combustion process and make necessary adjustments to optimize fuel usage and minimize emissions. The location in the exhaust path ensures accurate readings that directly correlate with the thermal efficiency of the boiler. While the other locations mentioned may seem relevant, they are not standard for the placement of a pyrometer. For example, a pyrometer inside the boiler drum would not effectively measure the exhaust gas temperature, and being in the water feed line would not provide the data needed for monitoring combustion efficiency. Additionally, while it may seem logical to place a pyrometer near the burner assembly to monitor initial combustion temperatures, the more critical reading for operational efficiency is taken from the exhaust gases. Therefore, it's clear that placing a pyrometer in the exhaust gases leaving the boiler is the most effective and informative location.