Massachusetts Oil Burner License Practice Test

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Prepare for the Massachusetts Oil Burner License Exam. Utilize flashcards and multiple choice questions, each with guidance and explanations. Get exam-ready!

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What happens to the viscosity of heating oil as it gets colder?

  1. It remains constant

  2. It decreases

  3. It increases

  4. It evaporates rapidly

The correct answer is: It increases

As heating oil gets colder, its viscosity increases. Viscosity refers to the thickness or resistance to flow of a liquid. In simpler terms, when heating oil is subjected to lower temperatures, the hydrocarbons within the oil move less freely, making the oil thicker and more resistant to flow. This is critical for oil burners, as higher viscosity can affect the performance of the burner, making it more difficult for the fuel to be atomized properly for combustion. Understanding this property is essential for maintaining efficient heating oil systems, especially in cold climates where temperatures can drop significantly.