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 gauge pressure when the absolute pressure on a boiler is 174.7?

160 PSIG.
189.7 PSIG.
189.4 PSIG.
170.0 PSIG.

The correct answer is: 160 PSIG.

To understand gauge pressure, it is essential to know the relationship between absolute pressure and gauge pressure. Absolute pressure is the total pressure measured from absolute zero, while gauge pressure is the pressure relative to atmospheric pressure. To find gauge pressure, atmospheric pressure (approximately 14.7 psi at sea level) must be subtracted from the absolute pressure. In this case, with an absolute pressure of 174.7 psi, you perform the subtraction: 174.7 psi (absolute pressure) - 14.7 psi (atmospheric pressure) results in a gauge pressure of 160 psi. Thus, the answer indicating 160 PSIG accurately reflects the correct calculation of gauge pressure, confirming that this option is the proper representation of gauge pressure based on the given absolute pressure.