Minnesota Boiler License Practice Exam

Does an automatically hot water boiler require a low water cut off?

1. True

2. False

3. Only for systems over 500,000 Btu

4. Only if it uses fuel

The correct answer is: False

An automatically controlled hot water boiler does not require a low water cut-off. This is primarily because automatically controlled boilers are designed with built-in safety features that manage the water level without the need for an additional low water cut-off device. In most cases, the operational systems and controls in automatically fired hot water boilers ensure that the water level is maintained within safe operating limits. This effectively reduces the risk of the boiler operating under low-water conditions, which can be dangerous. The absence of a low water cut-off makes the design less complex while still meeting safety regulations, as long as the boiler has the necessary operating controls to monitor and adjust the water levels appropriately. Though other options provided indicate specific conditions or variations under which a low water cut-off might be considered, they do not apply universally to automatically controlled hot water boilers. Therefore, the accurate response is that no specific requirement for a low water cut-off exists for these types of boilers, making the answer valid.