A properly adjusted oil burner should have a smoke test reading of what?

A properly adjusted oil burner should have a smoke test reading of 0 because this indicates efficient combustion of the fuel with minimal smoke production. An ideal smoke test reading of 0 shows that the burner is properly tuned, allowing for complete combustion and thus leading to fewer emissions and better overall performance. This reading reflects that the fuel is being burned cleanly, which enhances energy efficiency and minimizes air pollution.

Higher readings suggest incomplete combustion, which can result in excessive soot and inefficient operation of the burner. Maintaining a smoke test reading of 0 is crucial for ensuring optimal functioning of the oil burner and for adhering to environmental standards.