12- Brazing and soldering are attractive comparing to welding for some situations: I. the metals have poor weldability II. only same metals are to be joined III. the intense heat of welding may damage the components being joined IV. the geometry of the joint is not suitable to any of the welding methods V. high strength is a requirement. a) I-II-II b) I-III-IV 1-II-II-IV-V 1-11 Only I

12- Brazing and soldering are attractive comparing to welding for some situations: I. the metals have poor weldability II. only same metals are to be joined III. the intense heat of welding may damage the components being joined IV. the geometry of the joint is not suitable to any of the welding methods V. high strength is a requirement. a) I-II-II b) I-III-IV 1-II-II-IV-V 1-11 Only I

Refrigeration and Air Conditioning Technology (MindTap Course List)

8th Edition

ISBN:9781305578296

Author:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Publisher:John Tomczyk, Eugene Silberstein, Bill Whitman, Bill Johnson

Chapter7: Tubing And Piping

Section: Chapter Questions

Problem 14RQ: When soldering, a flux is used to A. minimize oxidation while the joint is being heated. B. allow...

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4) Which material cannot be weld using friction stir welding process? O Steel O Aluminum O Magnesium Gold
34- I. Welding fixtures can be used to physically restrain movement of the parts during welding II. Welding conditions (speed, amount of filler metal used, etc.) can be selected to reduce warping II. The base parts can be preheated IV. Proper design of the weldment itself can reduce the degree of warping. What technique(s) given above can be used to reduce warping in arc welding? a) II-I|I-IV b) -HI-III-IV C) Only I 1-11 e) 1-11-1II
9) State true or false "Electro-slag welding offers better weld properties of medium carbon steel plate weld joints as compared to electro-gas welding in terms of grain structure" True False
Answer by true (T) or false (F) for the folling sentences 1. Fusion welding means that the two surfaces to be joined and the filler metal are meling during welding and then solidifying in similar menner to local casting process. 2. In oxyacetylene welding process, the welding is done using oxidizing flame only. 3. Explusive welding process produces strong joints of dissimilar materials that are not weldable by are. 4. Hot working leads to eliminating the porosity in the metal and increasing the strength and hardness. 5. Work hardening is a characteristic induced in the processing part because of the heat treatment.
When soldering, a flux is used to A. minimize oxidation while the joint is being heated. B. allow the fitting to fit easily onto the tubing. C. keep the filler metal from dropping on the floor. D. help the tubing and fitting to heat faster.
When estimating weld cost, what weld joint design factors should be considered?
What changes can be made to successfully make a weld in a poorly fitted joint?
What factors other than carbon affect a steel's ability to be welded?
What can prevent both sides of a stainless steel tee joint from being welded?
What is the purpose of preheating metal before it is welded?
What alloying element used in FCA welding electrodes causes the electrode to produce centerline cracks in the weld if it is used for multipass welds?
II) Name several products that have been assemble by 1. Resistance Spot Welding 11. Submerge Arc Welding 111. Seam Welding įv. iv. Brazing V. Soldering 12) Compare the differences between brazing and oxy fuel gas welding 13) Propose any two welding defects that can be prevented by modifying the joint design and justify the importance of redesigning the joint