The "C-C Wheel Arrangement" refers to a specific configuration of wheels on a locomotive or train. In this arrangement, there are two sets of three driving wheels, each set located on either side of the locomotive's frame. This design is commonly used in steam locomotives and some diesel-electric engines, providing a balance between power and stability. The C-C arrangement allows for better traction and weight distribution, making it suitable for heavy freight trains. It is often seen in larger locomotives, such as those used in freight transport and passenger services, where the ability to handle steep grades and heavy loads is essential.