Massachusetts Oil Burner License Practice Test

What can lower the pour point of #2 oil?

1. Adding water

2. Blending with kerosene and fuel additives

3. Lowering the storage temperature

4. Increasing atmospheric pressure

The correct answer is: Blending with kerosene and fuel additives

Blending #2 oil with kerosene and fuel additives effectively lowers the pour point because kerosene has a naturally lower pour point than #2 oil. This blending process allows the mixture to remain fluid at lower temperatures, enhancing its cold-weather performance and preventing it from solidifying or becoming too viscous. Fuel additives may also include substances that specifically target pour point reduction by modifying the wax characteristics in the oil. Other options, such as adding water, can cause emulsification and stability issues rather than lowering the pour point. Lowering the storage temperature would actually increase the pour point relative to the temperature conditions, as the oil may become more viscous at lower temperatures. Increasing atmospheric pressure does not have a direct relationship with the oil's pour point and does not serve to lower it.