For a shell-and-tube heat exchanger problem my professor gave me 3.4 ° API for crude oil and 4.2 ° API for KEROSENE. What does this number mean??? What is ° API???
API is the American Petroleum Institute. They have standards for various things including how to describe certain products. In your case the information deals with the gravity of the fluids in question.
It's a measure of density as defined by the American Petroleum Institute. Both of your fluids are heavier than water since their values are below ten.
