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Study Guide Answers

1.     What is welding?
     the process of joining two or more pieces of metal by the application of heat or pressure
2.     What are the two most common types of welding?
     oxyacetylene welding and arc welding
3.     What is the temperature of the flame that's used in oxyacetylene welding?
     6,300 degrees F
4.     What is a "welding rod"?
     filler metal used in welding
5.     Arc welding processes require a continuous supply of what?
     either direct or alternating electrical current
6.     What temperature may arcs reach during arc welding?
     10,000 degrees F
7.     What are the most widely used welding processes?
     shielded metal arc welding/ gas tungsten arc welding (T.I.G.)/ gas metal arc welding (M.I.G.) / submerged arc welding
8.     What is "plasma arc cutting"?
     It severs metal by using a constricted arc to melt a small area of the work.
9.     What temperature can be achieved during plasma arc cutting?
     50,000 degrees F
10.     Welders generally plan work from ____________________________________________________.
     drawings or specifications
11.     What do welding machine operators do?
     They monitor automated welding tasks.
12.     Oxyacetylene welding equipment is portable and easy to use. True or false?
     true
13.     What controls gas pressure during oxyacetylene welding?
     a regulator
14.     In arc welding, the extreme heat of a(n) ____________________________arc creates the weld.
     electric
15.     Welders use ____________________________ or _______________________________ to chip or grind off excess weld, slag, or spatters.
     hammers/ grinders
16.     What is the primary safety hazard during arc welding?
     ultraviolet light, or radiation, and burns to the eyes and skin ( flashburn )
17.     Why should a helmet with special lenses be worn?
     to shield and protect the eyes and skin from flashburn
18.     Remove flammable materials from the welding area in order to prevent ________________________.
     fires
19.     Toxic fumes and gas may build up and cause ___________________________________________.
     oxygen deficiency
20.     Bare spots on cables can lead to ________________________________________________.
     electrical shock
21.     When mishandled, gas cylinders can ____________________________________________.
     explode
22.     Never use ______________________________________ on oxyacetylene welding equipment.
     oil or grease
23.     Store cylinders in a(n) __________________________________ position.
     upright
24.     Welding can be used to create artistic sculptures. True or false?
     true
25.     A welder usually earns a very low income. True or false?
     false
© Educational Video Network, Inc. 2005 - www.evndirect.com
Your leading source for curriculum-based educational videos and DVDs.