USCG Exam PracticeLube oil and fuel oil systems
What is the primary reason fuel oil is heated before it reaches the burners or purifiers?
- A. To increase the oil's density so it settles faster in the tank
- ✓ To lower the oil's viscosity so it flows and atomizes readilyCorrect
- C. To raise the oil's flash point above the ignition temperature of the burner
- D. To expand the oil volume and increase pump delivery pressure
Why B is correct
DOE-HDBK-1012 §3-1 explains that heating a fuel or lube oil lowers its viscosity so it flows and atomizes readily, which is why fuel-oil heaters are fitted ahead of purifiers and burners. Density and flash point are not the governing reasons cited.
Cited:DOE-HDBK-1012 §3-1