Brazing Access Valve

1.     What is the process of joining metals by melting and flowing a filler metal using high heat?

• A. Brazing

• B. Forging

• C. Soldering

• D. Welding

What is the color of the flame needed in brazing?

• A. Blue

• B. Orange

• C. Red

• D. Yellow

3. When does the silver rod can be applied to copper tube for brazing?

• A. When the copper tube becomes orange hot

• B. When the copper tube becomes red hot

• C. When the copper tube cannot be held due to heat

• D. When the copper tube is not yet heated

4. How to check the quality right after brazing?

• A. By feeling to check for sharp edges

• B. By smelling to check if there are burned areas

• C. By hearing to check for loud cracking sounds

• D. By seeing to check for gap and avoid burns

5. Why does copper tube should be placed in holder?

• A. To avoid copper tube from falling

• B. To avoid having burns while heating

• C. To have a better grip for copper tube

• D. All of the above