Which trait makes it easiest to distinguish a turbine fuel leak?

New fuel leaks are typically more prominent and visible due to their fresh appearance and the way they interact with the environment. When a turbine fuel leak occurs, the fresh fuel tends to create a noticeable sheen on surfaces, which can attract attention. In contrast, older leaks may have had time to evaporate or be obscured by environmental elements such as dirt, dust, or grime that can cover them up. This is why old fuel leaks can sometimes be less distinct, making it more challenging to identify them compared to newly occurring leaks.

Therefore, distinguishing a turbine fuel leak is easier with fresh leaks, which provide clear indicators, while older ones may blend into the environment and become less noticeable over time.