Fitter Trade top 05 mcq on Soldering.

1. In the process of soldering, you have noticed solder not sticking to sufficiently heated copper
soldering bit when rubbed over solder bar. What step do you take to overcome the problem?

Clean the bit thoroughly.


2. Medium solder contains

50% lead & 50% tin. 

3. Which is the flux used for soldering

a. Zinc chloride 
b. Ammonium Chloride 
c. Hydro chloric acid 

d. All the Above.

4. Melting temperature range of soft solder

150-3500.

5. Electrician Solder contains

Lead 58% & Tin 42%.