BRAZING FINAL PAPER 2026 CERTIFICATION EVALUATION QUESTIONS AND SOLUTIONS GRADED A+

BRAZING FINAL PAPER 2026
CERTIFICATION EVALUATION QUESTIONS
AND SOLUTIONS GRADED A+

●● What does the prefix RB indicate in filler metal designations?
Answer: The filler metal may be used for braze welding as well as a
brazing filler metal.


●● What is the chemical symbol for silver brazing filler metals?
Answer: BAg


●● What are some forms that brazing filler metals can take?
Answer: Wire, rod, powder, paste, washers, rings, strips, shims, slugs, or
preformed shapes.


●● What is the melting temperature range for silver-based brazing filler
metals?
Answer: From 618°C to 1038°C (1144°F to 1900°F).


●● What elements are commonly found in BAg filler metals?
Answer: Silver, copper, cadmium, zinc, and nickel.

, ●● What is a significant safety concern when using BAg filler metals?
Answer: Zinc and cadmium fumes are toxic and should be used with
caution.


●● What must be removed from cast iron surfaces for satisfactory silver
brazing?
Answer: Silicon and carbon.


●● What is the recommended flame type for manual torch brazing with
silver-based filler metals?
Answer: A carburizing flame (2.5X-3X).


●● What are the seven categories of filler metals in AWS A5.8
specifications?
Answer: 1. Silver (BAg), 2. Aluminum-silicon (BAlSi), 3. Nickel (BNI),
4. Copper and copper-zinc (BCUP), 5. Gold (BAu), 6. Cobalt (BCO), 7.
Magnesium (BMg).


●● What is the purpose of adding zinc and cadmium to silver-copper
alloys?
Answer: To improve wetting when torch brazed and to lower the melting
temperature.