🔍 Key Concepts

• Boiler steam generating capacity and what factors influence how much steam can be produced over time • How heat transfer area in a boiler affects the rate of steam generation • Relationships among burner heat input, circulation (tubes/downcomers), and heat-absorbing surface

💭 Think About

• Ask yourself: which of these options directly affects how much heat can be transferred to the water and turned into steam per hour? • Consider whether the number of burners alone guarantees higher steam capacity, or if other design features can limit or enhance that capacity. • Think about how both water circulation (tubes/downcomers) and total heating surface might work together to determine maximum steam output, not just one component by itself.

✅ Before You Answer

• Identify which factors change the rate of heat input to the boiler (BTU/hr or kW). • Identify which factors change the effective heat transfer area where water absorbs heat and becomes steam. • Decide whether steam capacity depends on one single factor or on the combined effect of multiple design features in the boiler.