🔍 Key Concepts

• Boiler light-off sequence and safe firing practices • Relationship between fuel atomization, combustion, steam quality, and water circulation • What must be established to prevent damage to boiler tubes and drums

💭 Think About

• Think about what condition must be safely established and stable before you increase firing rate and build up pressure in a boiler. • Which of these choices, if it is NOT established first, could quickly cause serious damage or unsafe operation? • Consider the normal start-up sequence: what must be ensured before good steam quality and proper fuel burning can be relied on?

✅ Before You Answer

• Identify which option is a fundamental internal protection for the boiler metal surfaces. • Decide which items (combustion, atomization, moisture carryover) are results of firing rather than preconditions. • Ask yourself which condition must be verified as satisfactory before you can safely adjust fuel and air for proper firing.