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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Chapter 7, Problem 29R
Why is a slight forward torch angle helpful for cutting?
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Both portions of the rod ABC are made of an aluminum for which E = 70 GPa.
Based on the given information find:
1- deformation at A
2- stress in BC
3- Total strain
4- If v (Poisson ratio is 0.25, find the
lateral deformation of AB
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P=Last 2 student ID+ 300 KN
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24
Diameter Last 2 student ID+ 15 mm
Last 3 student ID+ 500 mm=L1
724
C
B
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Q=Last 2 student ID+ 100 KN
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Diameter Last 2 student ID+ 40 mm
Q2Two wooden members of uniform cross section are joined by the simple scarf splice shown. Knowing that the
maximum allowable tensile stress in the glued splice is 75 psi, determine (a) the largest load P that can be safely
supported, (b) the corresponding shearing stress in the splice.
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Last 1 student ID+5 inch=W
=9
4
L=Last 1 student ID+8 inch
=12
60°
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Q4
The two solid shafts are connected by gears as shown and are made of a steel for which the allowable shearing
stress is 7000 psi. Knowing the diameters of the two shafts are, respectively, dBC
determine the largest torque Tc that can be applied at C.
4
and dEF
dBC=Last 1 student ID+3 inch
dEF=Last 1 student ID+1 inch
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R=Last 1 Student ID+5 inch
9
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Tc
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Chapter 7 Solutions
Study Guide with Lab Manual for Jeffus' Welding: Principles and Applications, 8th
Ch. 7 - Using Table 7-1, list the six different fuel gases...Ch. 7 - What metals can be cut with the oxyfuel gas...Ch. 7 - What other term is used to refer to the OFC...Ch. 7 - What is a combination welding and cutting torch?Ch. 7 - State one advantage of owning a combination...Ch. 7 - State one advantage of owning a dedicated cutting...Ch. 7 - What is a mixing chamber? Where is it located?Ch. 7 - Define the term equal-pressure torch. How does it...Ch. 7 - How does an injector-type mixing chamber work?Ch. 7 - State the advantages of having two oxygen...
Ch. 7 - Why are some copper alloy cutting tips...Ch. 7 - Using Table 7-4, answer the following: a . Oxygen...Ch. 7 - What determines the amount of preheat flame...Ch. 7 - What can happen if acetylene is used on a tip...Ch. 7 - Why are some propane and natural gas tips made...Ch. 7 - What types of tip seals are used with cutting...Ch. 7 - If a cutting tip sticks in the cutting head, how...Ch. 7 - How can cutting torch tip seals be repaired?Ch. 7 - What is used to reduce the high cylinder or system...Ch. 7 - What do the two pressure gauges on a regulator...Ch. 7 - Why must the gas pressure be released and the...Ch. 7 - What should be done if the torch flashes back?Ch. 7 - What is the purpose of a reverse flow valve?Ch. 7 - Why must the reverse flow valve and the flashback...Ch. 7 - How can a hose be checked for leaks?Ch. 7 - Why is the oxygen valve turned on before starting...Ch. 7 - Why does the preheat flame become slightly...Ch. 7 - What causes the tiny ripples in a hand cut?Ch. 7 - Why is a slight forward torch angle helpful for...Ch. 7 - Why should cans, drums, tanks, or other sealed...Ch. 7 - Why is the torch tip raised as the cutting lever...Ch. 7 - Why are the preheat holes not aligned in the kerf...Ch. 7 - Sketch the proper end shape of a soapstone that is...Ch. 7 - What are two methods you can use to determine what...Ch. 7 - What is the best way to set the oxygen pressure...Ch. 7 - Why is it important to have extra ventilation...Ch. 7 - What factors regarding a cut can be read from the...Ch. 7 - What is hard slag?Ch. 7 - Why is it important to make good-quality cuts?Ch. 7 - When using an ordinary welding table, what can be...Ch. 7 - Describe the methods of controlling distortion...Ch. 7 - List three things that can become a problem when...Ch. 7 - How does cutting small-diameter pipe differ from...
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