May Quiz of the Month
Shielded Metal-Arc Welding Basic

Transformer/rectifier type welding machines a) Have alternating or direct current output b) Have alternating current output only Rotating type welding machines can be powered by a) Electric motor or internal combustion engines b) Transformers Most welding machines are rated at a 60% duty cycle. This means that. a) The welding machine may be used at 60% of its rated current b) The welding machine may be used 6 minutes out of every 10 minutes at its rated load If the welding machine is operated at less than its rated load a) It may be operated for longer periods of time without stopping b) The operating time does not change