Minnesota Boiler License Practice Exam

Disable ads (and more) with a membership for a one time $2.99 payment

Study for the Minnesota Boiler License Exam. Deepen your knowledge with expertly designed flashcards and multiple choice questions, each complete with helpful hints and detailed explanations. Get prepared for your licensing success!

Each practice test/flash card set has 50 randomly selected questions from a bank of over 500. You'll get a new set of questions each time!

Practice this question and more.

What is the minimum vent pipe size for a tank filled with #6 oil, 110 feet high and 70% full?

1 1/2"
2 1/4"
3 1/2"
4"

The correct answer is: 2 1/4"

To determine the minimum vent pipe size for a tank filled with #6 oil that is 110 feet high and 70% full, we must consider several factors including the type of fuel, tank height, and the pressure created by the fluid within the tank. #6 oil is a heavy fuel that requires adequate venting to prevent pressure buildup during filling and emptying. The height of the tank contributes to the hydrostatic pressure exerted by the liquid, which can affect the venting requirements. The size of the vent pipe is crucial, as it needs to accommodate the flow of air or other gases that are displaced when the tank is filled or emptied. A vent that is too small can lead to inefficient operation or even failure to function correctly. The minimum vent size you arrived at—2 1/4 inches—provides sufficient airflow based on the volume and type of oil in the tank. Considering the dimensions and characteristics of the tank, the importance of proper venting helps avoid problems such as backpressure, which can cause disruptions at the feed line or potentially lead to safety hazards. The other options represent either inadequate sizes that may not accommodate the changes in pressure effectively or larger sizes that would not be necessary for the given specifications.