SUB arc advantages, disadvantages and technique

What is the highest recorded deposition rate in lb/hr?

Which of the following is not true?

What positions can sub arc be used in

The most basic SUB arc welding technique uses 2 wires and shielding gas along with flux.

SUB arc welding produces low heat input and is normally used on material thinner than 1/4"

The sub arc welding process can be used in all positions

You can only weld Ferrous material with the SUB arc welding process

SUB arc welding process processed a visible weld puddle when traveling along the joint

You can use up to 5 wires in the same weld pool

You can run each separate wire in the weld pool on a different polarity ex. DCEP another on AC