Which one of the following is the type of transformer used in arc welding ?

Step down

Step up

One-to-one

Capable of increasing supply voltage

Motor generator set

Engine generator set

Rectifier set

Welding transformer

Positive 2/3 and negative 1/3

Positive 1/3 and negative 2/3

Positive 3/4 and negative 1/4

Positive 1/4 and negative 3/4

Flat

Vertical

Horizontal

Overhead

diameter of its core wire

diameter (overall) of electrode

thickness of flux coating

length of electrode