Welding: Principles and Applications (MindTap Course List)
8th Edition
ISBN: 9781305494695
Author: Larry Jeffus
Publisher: Cengage Learning
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Textbook Question
Chapter 11, Problem 21R
What should the welder watch if the view of the weld is obstructed by the shielding gas nozzle?
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G = 0.350MPa, P = 900N, a=20mm, b=50mm, c=80mm
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1.5 kN/m
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C
14.10. A liquor containing 15 per cent
solids is concentrated to 55 per cent
solids in a double-effect evaporator.
operating at a pressure in the second
effect of 18 kN/m². No crystals are
formed. The flowrate of feed is 2.5 kg/
s at 375 K with a specific heat capacity
of 3.75 kJ/kg K. The boiling-point rise of
the concentrated liquor is 6 deg K and the
steam fed to the first effect is at 240 kN/
m². The overall heat transfer coefficients
in the first and second effects are 1.8 and
0.63 kW/m²K. respectively. If the heat
transfer area is to be the same in each
effect, what areas should be specified?
D
A
Chapter 11 Solutions
Welding: Principles and Applications (MindTap Course List)
Ch. 11 - What items make up a basic semiautomatic welding...Ch. 11 - What must be done to the shielding gas cylinder...Ch. 11 - Why is the shielding gas valve "cracked" before...Ch. 11 - What causes the electrode to bird-nest?Ch. 11 - Why must all fittings and connections be tight?Ch. 11 - What parts should be activated by depressing the...Ch. 11 - What benefit does a welding wire's cast provide?Ch. 11 - What are the advantages of using a feed roller...Ch. 11 - Why should the feed roller drag prevent the spool...Ch. 11 - Why must you always wind the wire tightly into a...
Ch. 11 - How is the amperage adjusted on a GMA welder?Ch. 11 - What effect on the welding current does increasing...Ch. 11 - Using Table 11-1, determine the amperage if 400...Ch. 11 - What happens to the weld as the electrode...Ch. 11 - What is the effect on the weld of changing the...Ch. 11 - What are the advantages of adding oxygen or CO2 to...Ch. 11 - What reactive gases are used with argon for GMA...Ch. 11 - What are the advantages of using CO2 for making...Ch. 11 - What is mill scale?Ch. 11 - What type of porosity is most often caused by mill...Ch. 11 - What should the welder watch if the view of the...Ch. 11 - When making a vertical weld and it appears that...Ch. 11 - What are the advantages of making vertical down...Ch. 11 - How can small weld beads be maintained during...Ch. 11 - How can spatter be controlled on the nozzle when...
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