Welding: Principles and Applications (MindTap Course List)

8th Edition

ISBN: 9781305494695

Author: Larry Jeffus

Publisher: Cengage Learning

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Textbook Question

Chapter 10, Problem 10R

In the pulsed-arc metal transfer current cycle, what is the term used to describe how the electric current in a transformer takes a few milliseconds to build up the magnetic field to full strength once the coil is energized?

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Chapter 10, Problem 9R

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1)a) Why is automation of the covered electrode arc source difficult?b) what properties is a metal with good resistance welding ability expected to have?c) Why is the heat transfer factor higher in arc welding processes with the consumed electrode than the methods used with the non-consumed electrode?d) Why is it important to weld thin and long instead of thick and short?e) why is it important that the source root is designed to be forced to press, not pull? 2) there is a characteristic liquid penetration error on a large piece of steel poured in the sand mold. The surface of the piece consists of a mixture of sand and metal.a) Explain at least 3 of the steps that can be taken to correct this error.b) what other types of casting errors may possibly occur in each of these steps? Explain 3) grain structure formed in part after casting;a) Describe by drawing a figure.b) what problems can this grain structure pose? Please explain. How can these problems be cured?4) explain two of the…

Chapter 10 Solutions

Welding: Principles and Applications (MindTap Course List)

Ch. 10 - Why is usage of the term GWW preferable to MIG for...Ch. 10 - Using Table 10-1, answer the following: a. What...Ch. 10 - What factors must be considered when selecting...Ch. 10 - In short-circuiting transfer, what type of current...Ch. 10 - Describe the globular transfer process.Ch. 10 - In what form is metal transferred across the arc...Ch. 10 - What three conditions are required for the spray...Ch. 10 - Using Table 10-3, answer the following: a. What...Ch. 10 - Describe the current produced by the pulsed-arc...Ch. 10 - In the pulsed-arc metal transfer current cycle,...

Ch. 10 - List five advantages of the modulated current and...Ch. 10 - What is the difference between the wire melting...Ch. 10 - Using Figure 10-13, what is the approximate...Ch. 10 - Using Table 10-6, what would the amperage be for...Ch. 10 - The shielding gas selected can affect what...Ch. 10 - What may happen if the GMA welding electrode is...Ch. 10 - What effect does shortening the electrode...Ch. 10 - Describe the weld produced by a forehand welding...Ch. 10 - Describe the weld produced by a backhand welding...Ch. 10 - What components make up a GMA welding system?Ch. 10 - Why must GMA welders have a 100 duty cycle?Ch. 10 - What can happen if rollers of the wrong shape are...Ch. 10 - Where is the drive motor located in a pull-type...Ch. 10 - How is the wire-feed speed changed with a linear...Ch. 10 - What type of liner should be used for aluminum...Ch. 10 - What parts of a typical GMA welding gun can...Ch. 10 - Describe the spot welding process using a GMA...

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In the pulsed-arc metal transfer current cycle, what is the term used to describe how the electric current in a transformer takes a few milliseconds to build up the magnetic field to full strength once the coil is energized?

Solution Summary: The author explains ramp-up is the term used to describe the process of building up the magnetic field to full strength once the coil is energized by the current.

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Chapter 10 Solutions