Choosing the option indicating that wet fuel oil can cause incomplete combustion and increased emissions highlights a significant concern in burner operation. When fuel oil contains excessive moisture, it does not combust effectively within the burner. The water in the fuel requires energy to vaporize, which detracts from the heat released during combustion. As a result, the combustion process becomes less efficient, leading to incomplete combustion.
Incomplete combustion can produce harmful byproducts, such as carbon monoxide and unburned hydrocarbons, which contribute to increased emissions. This not only affects air quality but can also lead to higher operational costs due to wasted fuel and potential fines for failing to meet emissions standards.
In contrast, the other options do not accurately reflect the consequences of using wet fuel oil. It does not enhance burning efficiency or improve odors, nor is it accurate to assert that it has no impact on operation. Each of these incorrect options fails to address the critical issues associated with moisture in fuel oil, specifically concerning combustion efficiency and environmental impact.