Question 25Steam Plants - 1st Asst/Chief

The correct answer is B) result in an uneven flow of oil through the burner. In a multi-burner firebox, a burner tip with a worn and enlarged orifice will cause an uneven flow of oil through the burner. This is because the orifice, which is designed to control the flow of oil, has become enlarged due to wear. As a result, the oil will not be evenly distributed across the burner, leading to an uneven combustion process. The other options are incorrect because: A) A worn and enlarged orifice would not cause smokeless and flameless combustion, which is typically associated with proper fuel-air mixture and complete combustion. C) The proper pressure may not be able to compensate for the uneven flow caused by the enlarged orifice. D) A worn orifice would not necessarily cause a high fuel oil return line back pressure, which is more likely to be caused by other issues in the fuel delivery system.