🔍 Key Concepts

• Steam-assisted atomization vs. mechanical atomization – what provides the atomizing energy in each case? • Boiler start-up conditions – when is steam available and when is it not? • Fuel economy vs. operational necessity – is this change mainly about efficiency or about being able to operate under certain conditions?

💭 Think About

• Think about what happens when a boiler has been completely shut down. Do you have steam available to assist fuel atomization at that moment? • Which of the options describes a situation where you must be able to burn fuel before any steam is being generated? • Ask yourself whether atomizer design changes are primarily done to fine‑tune fuel economy, or to ensure the burner will function in specific operating scenarios.

✅ Before You Answer

• Identify which choice clearly depends on already having steam available – that one should be viewed critically in a cold condition. • Check which option directly relates to the ability to start and fire the boiler when no steam pressure exists yet. • Confirm that the selected option is about making atomization possible under low or zero steam pressure, not about routine fine‑tuning during normal steaming.