A boiler pressure relief valve is designed to protect against which condition?

A boiler pressure relief valve is designed to protect against which condition?

• A. Backflow into the supply
• B. Low water level
• C. Overpressure in the boiler
• D. Freezing

Answer: (C)

Boiler pressure relief valves are safety devices that protect against dangerous overpressure. When the boiler's internal pressure reaches the valve’s set point, the valve opens and releases steam or hot water to bring the pressure back down to a safe level. This prevents the boiler from rupturing or exploding due to excessive pressure. It’s a last-resort defense specific to pressure, not used for preventing backflow, managing low water levels, or preventing freezing.

Boiler pressure relief valves are safety devices that protect against dangerous overpressure. When the boiler's internal pressure reaches the valve’s set point, the valve opens and releases steam or hot water to bring the pressure back down to a safe level. This prevents the boiler from rupturing or exploding due to excessive pressure. It’s a last-resort defense specific to pressure, not used for preventing backflow, managing low water levels, or preventing freezing.