Multiple choice

A primary fuel is that which is used in the same form as it occurs in nature. Which of the following is not a primary fuel?

  1. Natural Gas

  2. Coal

  3. Wood

  4. Kerosene

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Primary fuels are found in nature (like coal, wood, and natural gas). Kerosene is a refined petroleum product, making it a secondary fuel.