Lesson A5-6: Applying Shielded Metal Arc Welding




Дата канвертавання26.04.2016
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Name_____________________________________

Worksheet

Lesson A5–6: Applying Shielded Metal Arc Welding

Define the following terms.

Alternating current
Amperage
Arc length
Arc welding
Conductor
Crater
Direct current
Duty cycle
Electricity
Electrode
Electrons
Fillet weld
Groove weld
Part One: Matching

Instructions. Match the term with the correct response. Write the letter of the term by the definition.

a. arc length e. electrode h. welder

b. arc welding f. polarity i. welding

c. duty cycle g. resistance j. weldor

d. electricity

_______ 1. Melting, flowing together and freezing of metals under controlled conditions.

_______ 2. Bare metal rod.

_______ 3. Person doing the welding.

_______ 4. Opposition to the flow of current in a circuit.

_______ 5. Uses electricity to heat and melt the metal.

_______ 6. Machine doing the welding.

_______ 7. Flow of tiny particles called electrons through a conductor.

_______ 8. Direction the current is flowing.

_______ 9. Percentage of a 10 minute period that a welder can operate at a given current setting.

_______ 10. Distance from the tip of the bare end of the electrode to the base metal.

Part Two: Completion

Instructions. Provide the word or words to complete the following statements.

1. Electron flow in one direction is called ________________ ______________.

2. The process of building up several layers of weld deposit by running overlapping passes is

known as ___________________.

3. ___________ _________________ is equal to the diameter of the bare end of the electrode.

4. Correct speed of travel should produce a bead that is _________ to _________ times the diameter

of the bare end of the electrode.

Kentucky Agricultural Education Lesson Plan Library — Agricultural Mechanics and Technology

Unit A. Problem Area 5. Lesson 6. Page 14.

5. Correct amp setting depends on the ____________________ of the base metal and the

_________________ of the electrode.

6. When electrical current alternates or reverses the direction of electron flow is called

_________________ _________________.

7. _____________________ is what causes the electric energy to be transformed into heat.

8. Running a bead with a sidewise or oscillating motion is called _______________.


Part Three: Short Answer

Instructions. Provide information to answer the following questions. Use complete sentences.

1. What are the requirements of a good or sound weld?


2. What are the three functions of flux?

a.

b.



c.

From Objective 5 summarize what you believe are the top 10 safety rules when welding.

a.

b.

c.



d.

e.

f.



g.

h.

i.



j.

List the four welding positions:



A.

B.

C.



D.


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