Fire Up Your Future: Ace the Minnesota Boiler License Test 2025!

Question: 1 / 400

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

Nothing

Boiler will explode

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.

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The pressure in the system will decrease

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