American Society of Mechanical Engineers (ASME) Practice Exam

The proper viscosity range for burning #6 oil with mechanical atomization is critical for ensuring optimal fuel performance and efficient combustion. Viscosity directly affects the fuel's ability to be atomized, which is essential for achieving a fine spray suitable for effective combustion in burners.

For #6 oil, which is a heavy residual fuel oil, the viscosity range of 100 to 150 Saybolt Universal Seconds (SSU) is commonly recommended. This range provides a balance that allows the oil to flow adequately through the fuel system and be atomized effectively by the burner. If the viscosity is too low, the oil may not maintain enough density for proper combustion, while a viscosity that is too high could hinder flow and atomization, resulting in inefficient combustion and increased emissions.

Understanding this range is important for anyone working with mechanical fuel atomization systems, especially in industrial contexts where heavy fuel oils like #6 oil are used. Keeping the viscosity within this optimal range ensures the fuel can be efficiently burned, maximizing energy output and minimizing waste.