Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 16, Problem 7R
What problem can an excessively large tungsten cause?
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Students have asked these similar questions
Which among the following gas welding flame is
used for welding Zinc and its alloys?
a. Oxidizing Flame
O b. Natural Flame
c. Reducing Flame
O d. Carburizing Flame
QUESTION
An operator working on an operation involving particularly high pressures would likely use which
18f the following cermet material types?
POSSIBLE ANSWERS
Titanium carbonitride
Molybdenum carbide
Aluminum oxide
Tungsten cobalt
The strength in the weld zone of an age-hardening aluminium alloy is often higher than in the heat affect zone (HAZ). Which of the following is NOT a reason for this?
O The maximum temperature is higher in the weld pushing more of the hardening phase into solution.
O Particles that don't dissolve might transform into equilibrium phases instead. This is more likely in the HAZ.
O The greater dissolution of particles in the weld leads to greater solid solution strengthening.
O The increase in solute in the matrix allows more subsequent natural aging to occur in the weld zone.
O Particles in the HAZ tend to dissolve, while those in the weld coarsen. The increase in particle size and spacing reduces the strength of HAZ.
Chapter 16 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 16 - What early advancements made the GTA welding...Ch. 16 - What metals were weldable only by the GTAW process...Ch. 16 - Which two of tungsten's properties make it the...Ch. 16 - Why must the tip of the tungsten be hot?Ch. 16 - Prob. 5RCh. 16 - What functions regarding tungsten heat do the...Ch. 16 - What problem can an excessively large tungsten...Ch. 16 - What holds the molten ball of tungsten in place at...Ch. 16 - Using Table 15-1, answer the following: a. What...Ch. 16 - What does adding thorium oxide do for the tungsten...
Ch. 16 - How can the end of a tungsten electrode be shaped?Ch. 16 - Why should a grinding stone that is used for...Ch. 16 - Why should the grinding marks run lengthwise on...Ch. 16 - What are three ways of breaking off the...Ch. 16 - What is the correct color to use on the balled end...Ch. 16 - Why should the torch be as cool as possible?Ch. 16 - What will happen to a water-cooled torch cable if...Ch. 16 - Why must shielding gas hoses not be made from...Ch. 16 - What materials can be used to make nozzles?Ch. 16 - What problem can a long nozzle cause to the...Ch. 16 - Why must the tube of a flow meter be vertical?Ch. 16 - What is the heat distribution with DCEN welding...Ch. 16 - What is the heat distribution with DCEP welding...Ch. 16 - What is the heat distribution with AC welding...Ch. 16 - Why must AC welding power use high frequencies to...Ch. 16 - Why are argon and helium known as inert gases?Ch. 16 - Why is argon's ease of ionization a benefit?Ch. 16 - What makes helium difficult to use for manual...Ch. 16 - What are the benefits of adding hydrogen to argon...Ch. 16 - What is the purpose of a hot start?Ch. 16 - Using Table 16-3, determine the gas post flow time...Ch. 16 - What functions can a remote control provide the...Ch. 16 - Using Table 16-4, determine the minimum gas flow...
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