Welding

Welding 1

100

What are the 4 main processes in welding? Write out each abbreviation.

GMAW-Gas Metal Arc Welding

 GTAW- Gas Tungsten Arc Welding

SMAW- Shielded Metal Arc Welding

 FCAW- Flux Core Arc Welding

200

What is the fusion or growing together of the grain structure of the materials being welded?

Coalescence

300

What welding process is manual?

Stick welding

400

What is a welding process that is semiautomatic?

Mig or flux core

500

What does the e in E6010 stand for?

electrode

Welding 2

100

What is the melting point of steel?

2400-2800 degrees F

200

What was the joining method introduced in the Industrial Revolution from 1750-1850?

Forge or hammer welding

300

Nam one metal that is considered soft?

Brass, Aluminum, Copper

400

What are 3 things that you take into consideration when selecting the welding process you will be using?

availability of equipment, quality requirements, location of work, materials to be joined, time, skill, cost, code

500

Why can't you join steel to aluminum?

Different properties, carbon equivalent does not match

Cutting

100

What are the two different kinds of torches?

Dedicated and combination

200

What uses a stiff, highly ionized, hot column of gas to instantly vaporize the metal being cut?

Plasma Arc Cutting

300

Why can Plasma Arc Cutting cut almost any metal?

Because it does not rely on rapid oxidation of the metal being cut

400

What is the difference between a dedicated torch and combination torch?

Combination torches can be used for multiple things like oxyfuel welding because it has interchangeable tips while a dedicated torch is only used for cutting.

500

Can oxyfuel cutting be used for any kind of metal? Explain.

No, you cannot cut stainless steel or aluminum and some high carbon steels because the oxides in these metals have higher melting points than the base metal

Safety

100

What are the 3 kinds of light?

Ultraviolet, infrared and visible

200

When moving a gas cylinder what are 2 things you must always do?

Have the cap secured on the cylinder and always chained to the cart it is being transported in

300

What is the most dangerous light and why?

Ultraviolet because it cannot be seen or felt while being exposed to it.

400

Why are eye injuries supposed to be dealt with immediately?

Your eyes heal very fast and can cause rusting

500

What is the best choice for welding clothing?

100% Wool 

Fire Extinguishers

100

What is a Type A fire extinguisher used on?

Combustible solids like paper, wood and cloth.

200

What is a Type B fire extinguisher used on?

Combustible liquids like oil, gas, and paint thinner.

300

What is the symbol for a type A fire extinguisher?

Green triangle

400

What is a Type C fire extinguisher used on?

Electrical fires involving fuse boxes, motors, and welding machines.

500

What is a Type D fire extinguisher used on?

Combustible metals like zinc, magnesium, and titanium.