Which of the following is a characteristic of type IV fluid?

Type IV de-icing fluid is characterized by its green color and the fact that it is typically applied undiluted. This fluid is specifically designed to provide anti-icing protection, creating a protective layer on the aircraft surfaces to prevent ice from forming after the application. It is used primarily when conditions are less severe compared to those requiring type I fluids, which are heated and typically are used for de-icing. The undiluted application ensures that the fluid maintains its intended viscosity and effectiveness in preventing ice accumulation.

The color and application method help differentiate it from other types of fluids, which may have different properties and uses. For example, type I fluids are usually heated and orange, making them effective for immediate de-icing but not as effective for long-term anti-icing as type IV fluids. The characteristic of being effective only at low temperatures does not apply, as type IV fluids can perform effectively across a range of temperatures, although they are formulated for less extreme conditions than other types of fluids.