ARC AND GAS WELDING - Quiz

1) What is the purpose of annealing?

Improve hardness Improve machinability Improve brittleness Improve weldability

2) What is the advantage of AC arc welding machine?

More initial cost Freedom from arc blow More maintenance cost Un suitable for non ferrous metal

3) What is the advantage of using rectifier set in arc welding machine?

Suitable for all ferrous and non-ferrous Initial cost is lower Maintenance cost in less Not special safety precaution required

4) Which machine can be used any where in the field for welding away from electric main supply?

Motor generator set Engine generator set AC arc welding machine AC welding transformer with a rectifier

5) Which one of the following metals cannot be welded by AC welding machine?

Brass Cast iron Mild steel High carbon steel