🔍 Key Concepts

• Master boiler safety trips (what conditions shut the entire boiler down?) • How burner management systems treat common faults vs. burner-specific faults • What happens in a two-burner automatic boiler when only one burner has a local problem

💭 Think About

• Ask yourself: Which of these conditions is so serious that it should shut both burners down, not just one? • Think about which option would affect only one burner assembly instead of the entire boiler or air system. • Consider how the control logic reacts differently to a general boiler fault versus a problem local to a single burner’s own hardware.

✅ Before You Answer

• Identify which choices are boiler-wide safety shutdowns (these normally de-energize all fuel valves). • Identify which choice could affect just one solenoid valve rather than both at the same time. • Before answering, ask: Under this condition, would it be safe for the other burner to keep firing? If not, it likely closes both solenoid valves, not just one.