WELDING 2 METAL JOINING AND CUTTING - Quiz

1) What is the process of separating metal on heating by chemical reaction of oxygen and heated metal?

Gas cutting Plasma cutting Laser beam cutting Water jet cutting

2) What is known as heating the metal before welding or cutting?

Oxidizing Post heating Flame hardening Pre heating

3) What is the pre-heating temperature of steel Approximately for Gas Cutting?

900 Degree Centigrade 800 Degree Centigrade 600 Degree Centigrade 700 Degree Centigrade

4) What is the chemical reaction of substance with oxygen?

Ionisation Oxidation Reaction Formation

5) Which is the characteristic of plasma arc cutting?

Cuts are not so good quality Cutting speed very slow Non-metals can't be cut High speed piercing is archieved