Study Guide with Lab Manual for Jeffus' Welding: Principles and Applications, 8th
8th Edition
ISBN: 9781305494701
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 31, Problem 42R
Use Table 31-8 to determine which fuel gas would be best for (a) cutting material thicker than 5 in. (125 mm), (b) powdered metallizing, and (c) stack cutting.
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7) Consider the following statements
regarding Laser welding:
1: Conduction mode welding is normally used
for welding thin sheets, whereas keyhole mode
welding is used for much thicker sections.
II: Vapour pressure from the hot metal helps to
keep the keyhole open during keyhole mode
laser welding.
a. Statement I is correct, and statement II is
incorrect.
b. Statement Il is correct, and statement I
is incorrect.
c. Both statements I and Il are correct.
d. Both statements I and Il are incorrect.
Using Table 10-1, answer the following:a. What maintains the arc in machine welding?b. What feeds the filler metal in manual welding?c. What provides the joint travel in automatic welding?d. What provides the joint guidance in semiautomaticwelding?
9) A type of welding flows, which is the result of a perfect proportion and mixture of acetylene and oxygen and is used for fusion welding of steel and cast iron, is
a.
Oxy-acetylene flame
b.
Oxidizing flame
c.
Neutral flame
d.
Carburizing flame
Chapter 31 Solutions
Study Guide with Lab Manual for Jeffus' Welding: Principles and Applications, 8th
Ch. 31 - What is the purpose of a pressure regulator?Ch. 31 - What may result if a pressure regulator is not...Ch. 31 - Describe how a single-stage regulator operates.Ch. 31 - Is the torch pressure always the same as the...Ch. 31 - Why does the high-pressure gauge on a regulator...Ch. 31 - How does the operation of a safety release valve...Ch. 31 - Describe the difference between an argon cylinder...Ch. 31 - What is meant by regulator creep?Ch. 31 - Who can repair regulators?Ch. 31 - Why must the pressure be released from a regulator...
Ch. 31 - Why are combination welding and cutting torches...Ch. 31 - What is the advantage of using an injector-type...Ch. 31 - What should be done to the valve packing if the...Ch. 31 - What may happen to a tip seat if it is incorrectly...Ch. 31 - What can happen to a tip if it is excessively...Ch. 31 - What is the difference between a reverse flow...Ch. 31 - What are Siamese hoses?Ch. 31 - Why must the pressure be bled off hoses when work...Ch. 31 - What is the difference between a backfire and a...Ch. 31 - Why is a neutral flame the most commonly used...Ch. 31 - What properties should a good leak-detecting...Ch. 31 - Why must the oxygen cylinder valve be opened all...Ch. 31 - How long should hoses be purged?Ch. 31 - What should be done with cylinders that have...Ch. 31 - How should the spark lighter be held to light a...Ch. 31 - Once the torch is lit, why must the acetylene flow...Ch. 31 - What type of piping can be used for a manifold...Ch. 31 - What elements make up all hydrocarbons?Ch. 31 - What are the separate parts that make up an...Ch. 31 - Use Table 31-3 to determine which fuel gas...Ch. 31 - Approximately how long would it take a 50/50...Ch. 31 - Use Table 31-4 to determine which fuel gas has the...Ch. 31 - How is acetylene produced?Ch. 31 - Why is it not safe to use acetylene above 15 psig...Ch. 31 - Use Table 31-5 to determine the largest tip...Ch. 31 - Where is the highest temperature and where is the...Ch. 31 - Use Table 31-6 to determine what would be the...Ch. 31 - What are methylacetylene-propadiene fuel gases...Ch. 31 - Use Table 31-7 to determine which oxygen fuel-gas...Ch. 31 - Which fuel gas has the strongest odor and is...Ch. 31 - What is the major advantage of using propane or...Ch. 31 - Use Table 31-8 to determine which fuel gas would...Ch. 31 - What two major safety problems does hydrogen...Ch. 31 - Why should coat hangers not be used as gas welding...Ch. 31 - Explain the significance of the AWS filler metal...
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, mechanical-engineering and related others by exploring similar questions and additional content below.Similar questions
- Using Table 7-1, list the six different fuel gases in rank order according to their temperature.arrow_forwardUsing Table 16-3, determine the gas post flow time for a 3/32-in. (2.4-mm) tungsten.arrow_forwardUse Table 31-7 to determine which oxygen fuel-gas mixture produces the highest total heat.arrow_forward
- Why is a neutral flame the most commonly used oxyacetylene flame used?arrow_forwardUse Table 31-4 to determine which fuel gas has the highest burning velocity when mixed with oxygen.arrow_forwardUse Table 31-3 to determine which fuel gas requires the largest amount of oxygen from the torch.arrow_forward
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