Which of the following statements are correct about DC welding machines-MG Set?
I) It uses non-coated type electrodes; hence the cost of electrode is cheap.
II) It uses coated type electrodes; hence the electrode is expensive.
III) It is best suited for welding thinner sheets (6 mm).
IV) The initial cost of the machine is less compared to AC welding machine.
1
II and III
2
I and III
3
II and IV
4
I and IV