What is the normal percentage by volume of anti-ice inhibitor in turbine fuel (FSII)?

What is the normal percentage by volume of anti-ice inhibitor in turbine fuel (FSII)?

• A. 0.01 - 0.05 Percent
• B. 0.05 - 0.10 Percent
• C. 0.10 - 0.15 Percent
• D. 0.20 - 0.25 Percent

Answer: (C)

FSII is added to turbine fuel in a very small, controlled amount to prevent icing in the fuel system. The normal concentration is about 0.10 to 0.15 percent by volume. That means roughly 1 to 1.5 milliliters of FSII per liter of fuel (or 100 to 150 milliliters per 100 liters). This small dose provides enough icing protection for cold conditions without significantly altering fuel properties. If the amount were too low, icing could still occur in filters and lines; if too high, fuel properties and handling could be affected.

FSII is added to turbine fuel in a very small, controlled amount to prevent icing in the fuel system. The normal concentration is about 0.10 to 0.15 percent by volume. That means roughly 1 to 1.5 milliliters of FSII per liter of fuel (or 100 to 150 milliliters per 100 liters). This small dose provides enough icing protection for cold conditions without significantly altering fuel properties. If the amount were too low, icing could still occur in filters and lines; if too high, fuel properties and handling could be affected.