Which brazing method uses high-intensity infrared lamps as the heat source? Group of answer choices Torch brazing Furnace brazing Induction brazing Resistance brazing Dip brazing Infrared brazing
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- Torch brazing uses a flame from a torch. - Furnace brazing uses a controlled atmosphere furnace. - Induction brazing uses electromagnetic induction to generate heat. - Resistance brazing uses electrical resistance to generate heat. - Dip brazing Show more…
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9. Why would a fuel gas be bubbled through a flux container? a. So the flux can be carried to the torch where it combines with the flame. b. To help control the flame temperature. c. It is used to lubricate the valves of the torch. d. All of the above. 10. Which of the following is true of fluxes? a. They are not reactive at room temperature. b. If they are overheated, they contaminate the joint. c. They are not able to dissolve surface oxides. d. Fluxes are able to dissolve oils. 11. Which of the following is true of soldering and brazing fluxes? a. They will remove dirt and oil. b. They will remove paint and glues. c. They eliminate the need for joint cleaning. d. They will remove light surface oxides. 12. Fluxes that are active at room temperature: a. Must be neutralized after completing the job. b. Cannot be neutralized. c. Do not have to be cleaned off the part. d. Must only be removed if the part is to be painted. 13. In the method of soldering and brazing, the entire part must be able to withstand heating with: a. Furnace. b. Induction. c. Dip. d. Resistance. 14. Versatility, portability, and speed are all advantages of which brazing process? a. Torch brazing. b. Furnace brazing. c. Induction brazing. d. Dip brazing. 15. What alloys make up the filler metal BAISi? a. Ammonia and sodium. b. Alum and sulfur. c. Aluminum and silicon. d. Aluminum and silver.
Adi S.
An induction furnace uses electromagnetic induction to produce eddy currents in a conductor, thereby raising the conductor’s temperature. Commercial units operate at frequencies ranging from 60 Hz to about 1 MHz and deliver powers from a few watts to several megawatts. Induction heating can be used for warming a metal pan on a kitchen stove. It can be used to avoid oxidation and contamination of the metal when welding in a vacuum enclosure. At high frequencies, induced currents occur only near the surface of the conductor, in a phenomenon called the “skin effect.” By creating an induced current for a short time interval at an appropriately high frequency, one can heat a sample down to a controlle depth. For example, the surface of a farm tiller can be tempered to make it hard and brittle for effective cutting while keeping the interior metal soft and ductile to resist breakage.
Manish J.
25. Which of the following is an advantage of soldering or brazing? a. speed of joining b. less chance of damaging parts c. low temperature d. All of the Above 26. Fluxes that are inactive at room temperature ___. a. must be neutralized after the job is completed b. may result in corrosion if left on the part c. must be removed if the part is to be painted d. must always be removed 27. Soldering fluxes are chemical compounds such as ___. a. fluorides b. chlorides c. boric acids d. muriatic acid 28. What is an advantage of furnace brazing? a. controlled atmosphere b. corrosion protection c. steam explosions d. localized heating 29. For most soldered or brazed joints, ___ is usually fairly low. a. shear strength b. ductility c. fatigue resistance d. corrosion resistance 30. For a solder or braze joint, the ___ depends on the amount of overlapping area of the base parts. a. shear strength b. ductility c. fatigue resistance d. corrosion resistance 31. In ___ processing, the entire surface of the part can be covered with the filler metal at the same time being joined. a. furnace b. induction c. dip d. resistance 32. What is the paste range of an alloy of 61.9% tin and 38.1% lead? a. No paste range b. 12°F c. 73°F d. 173°F 33. The term phos-copper is used to refer to ___. a. phosphorous brazing rods that are used on copper. b. the type of joint being made using a copper alloy filler rod. c. copper-phosphorus rods d. a filler rod containing phosphate and copper.
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