To reduce the risk of static charges, what type of outer garments are preferred when working around fueling operations?

When working around fueling operations, the preferred type of outer garments is made from materials that minimize the risk of static electricity. Cotton is often the favored choice because it is a natural fiber that dissipates static charges more effectively than synthetic materials.

In this context, garments made from a combination of cotton and polyester (the choice indicated) are advantageous because they can provide both the static-dissipating properties of cotton and the durability or wrinkle-resistance of polyester. However, these blends may still retain some static charge, which poses a risk in fueling operations where flammable gases are present.

Completely synthetic materials, like nylon, tend to be poor in terms of static electricity control and can actually increase the risk of static discharge. Therefore, while a cotton and polyester blend is the correct answer, it's essential to note that the best protection against static while still ensuring functionality would be to wear 100 percent cotton whenever possible in fueling operations, as it is the safest option in terms of static electricity accumulation and discharge.