What must be checked before lighting off a boiler?

Study for the Massachusetts 3rd Class Engineer Exam. Access flashcards and multiple choice questions with hints and explanations. Prepare for success on your exam!

Before lighting off a boiler, ensuring that the furnace is purged of ignitable vapors or dust is imperative for safety and operational integrity. This process helps to eliminate any potentially explosive mixtures of gases or combustible dust that may have accumulated.

When a boiler is lit without adequate purging, there is a risk of explosion or fire due to the ignition of these vapors. The purging process is a critical step in establishing a safe environment for ignition, as it involves clearing the combustion chamber of harmful substances, thus allowing for proper air-fuel mixing and efficient combustion once the boiler is operational.

While checking the fuel type and quantity, evaluating the boiler's efficiency rating, and monitoring water temperature are important aspects of overall boiler operation and maintenance, they do not directly pertain to the immediate safety protocols necessary before lighting the boiler. Prioritizing the removal of any ignitable materials ensures the safety of personnel and the equipment during startup.

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