Equipment III Correct! Incorrect! 1. Which of the following must be present for combustion to occur? fuel and oxygen fuel and heat fuel, heat and oxygen View the lesson section again Correct! Incorrect! 2. A __________ is the most common type of mixer and is used for both continuous and batch applications. ribbon mixer stirred tank static mixer inline mixer View the lesson section again Correct! Incorrect! 3. Absorption is the adhesion of molecules to the surface of another phase. True False View the lesson section again