WELDING 2 METAL JOINING AND CUTTING - Practice Mode

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

Correct Answer: Gas cutting

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

Oxidizing Post heating Flame hardening Pre heating

Correct Answer: 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

Correct Answer: 900 Degree Centigrade

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

Ionisation Oxidation Reaction Formation

Correct Answer: Oxidation

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

Correct Answer: High speed piercing is archieved

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