SOLDERING & BRAZING CHAPTER 4: SOLDERS, BRAZING FILLER METALS AND FLUXES NAME DATE 1. Fluxes are classified into what three general groups? 2. 4. 5. 6. 7. 8. 1. 3. A flux used for soldering and brazing must meet the requirements of ASTM Standard 9. 2. 3. ASSIGNMENT What is the primary purpose of a flux? Is there a universal flux suitable for both soldering and brazing? What is the composition of 50-50 solder? 95-5 solder? Which solder, 50-50 or 95-5, has the greater pasty range? 2. 3. What are three rules which should be observed when using the paste type solders? 1. For Instr Are 50-50 and 95-5 the only solders available? DATE GRADE 8 Why is it recommended that flux be applied to copper tube as soon as possible af