Question

what type of wire is best used with u - cogged drive rolls?
metal cored or flux cored wires
only aluminum
only hard wires
all wires

Explanation:

U - cogged drive rolls are designed to work well with metal cored or flux cored wires. Aluminum wires may not be the best fit as they have different properties. Hard wires might not be the most suitable either. And it's not all wires as some wires may not interact properly with the U - cogged drive roll mechanism.

Answer:

Metal cored or flux cored wires