🔍 Key Concepts

• Complete combustion vs. incomplete combustion in oil-fired boilers • Effect of fuel atomization quality (droplet size) on smoke formation • Relationship between fuel viscosity/temperature and burner performance

💭 Think About

• How does changing fuel temperature affect its viscosity and the quality of atomization at the burner nozzle? • Would very small or very large fuel droplets be more likely to burn cleanly and completely? • Which condition would most likely lead to unburned carbon particles going up the stack as black smoke?

✅ Before You Answer

• Compare how high vs. low fuel pressure influences atomization and droplet size • Consider whether thicker (more viscous) vs. thinner (less viscous) fuel is harder to atomize properly • Ask: which option would most reasonably lead to poor combustion and unburned fuel rather than a hotter, cleaner flame?