Minnesota Boiler License Practice Exam

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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!

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If the expansion or compression tank becomes waterlogged and the burner starts, what may happen?

Nothing
Boiler will explode
Safety relief valve may lift
The pressure in the system will decrease

The correct answer is: Safety relief valve may lift

When an expansion or compression tank becomes waterlogged, it can no longer serve its purpose of absorbing the excess pressure caused by thermal expansion of water in the boiler system. If the burner starts in this situation, the water in the system continues to heat up, resulting in a rise in pressure. Since the expansion tank is ineffective due to being waterlogged, the excess pressure has no place to go, which can lead to the operation of the safety relief valve. The safety relief valve is designed to protect the system by releasing pressure to prevent damage or catastrophic failure, such as a boiler explosion. Therefore, the lifting of the safety relief valve in response to excessive pressure is a critical safety mechanism that activates when the system is under stress.