What is the largest way we get water in fuel?

What is the largest way we get water in fuel?

• A. Condensation
• B. Rainwater entry
• C. Fuel leaks
• D. Fuel addition

Answer: (A)

Moisture in fuel mainly comes from condensation of water vapor inside the air trapped in the fuel tanks. As temperature and altitude change, the humidity in that confined air condenses into liquid water and settles to the bottom of the tank. This process routinely introduces more water into the fuel than other sources, so condensation is the largest contributor. Rainwater entry and leaks can add water, and contaminated fuel during fueling could bring water in, but these are typically smaller or less consistent sources compared with the steady formation of water by condensation.

Moisture in fuel mainly comes from condensation of water vapor inside the air trapped in the fuel tanks. As temperature and altitude change, the humidity in that confined air condenses into liquid water and settles to the bottom of the tank. This process routinely introduces more water into the fuel than other sources, so condensation is the largest contributor.

Rainwater entry and leaks can add water, and contaminated fuel during fueling could bring water in, but these are typically smaller or less consistent sources compared with the steady formation of water by condensation.