RAC 40 Quiz 7 Review | Latest Update |
2024/2025 | 100% Verified
What is the key difference between soldering and brazing?
Soldering occurs below 840°F, while brazing takes place at temperatures above 840°F.
Why is flux used in both soldering and brazing?
Flux removes oxides from the...
RAC 40 Quiz 7 Review | Latest Update |
2024/2025 | 100% Verified
What is the key difference between soldering and brazing?
✔✔ Soldering occurs below 840°F, while brazing takes place at temperatures above 840°F.
Why is flux used in both soldering and brazing?
✔✔ Flux removes oxides from the metal surface and prevents further oxidation during the
heating process.
What is the purpose of capillary action in brazing?
✔✔ Capillary action draws the molten filler material into the joint between two metals.
Why is it important to clean metal surfaces before soldering or brazing?
✔✔ Cleaning ensures that there are no contaminants that could interfere with bonding or cause
weak joints.
Which type of filler metal is commonly used in soldering?
1
,✔✔ Tin-lead alloy is commonly used as a soldering filler material, though lead-free solders are
becoming more prevalent.
What is one advantage of brazing over welding?
✔✔ Brazing allows joining of dissimilar metals without melting the base materials.
How does the joint strength compare between soldering and brazing?
✔✔ Brazed joints are stronger than soldered joints due to the higher temperature and stronger
bond.
What is the most common method used to heat materials for brazing?
✔✔ Torch heating is the most common method used in brazing.
Why is it essential to avoid overheating during soldering?
✔✔ Overheating can cause the solder to burn or damage the components, leading to poor joint
quality.
In what situation would you use silver solder?
2
, ✔✔ Silver solder is used when a higher strength bond is needed, particularly for high-
temperature applications.
What happens if the gap between parts is too wide in brazing?
✔✔ If the gap is too wide, capillary action may fail, resulting in a weak joint.
What is the purpose of post-brazing cleaning?
✔✔ Post-brazing cleaning removes residual flux and oxides to prevent corrosion and improve
the joint's appearance.
Why are low-temperature solders typically used for electronics?
✔✔ Low-temperature solders minimize the risk of damaging sensitive electronic components.
What is the typical melting point range of solder used in plumbing?
✔✔ The typical melting point range of plumbing solder is 361°F to 500°F.
How does a flux-cored solder differ from a solid-core solder?
3
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