SOLDERING DE SOLDERING AND VARIOUS SWI - Quiz

1) What is the effect of over heating on soldering a joint?

Cold joint Poor wetting Dull grainy surface Flux trapped against lead

2) What is the name of defect if the flux is unable to remove the tarnish from the soldered joint?

Cold joint Poor wetting Pits and voids Dull gravity surface

3) What is the result of forced air is blown to cool the joint while soldering?

Solder setting very slowly Results in dry brittle joint Disturbs the chemical bonding Joint becomes mechanically stronger

4) What is the effect of shaking the soldered joint while cooling?

Flux will not dissolve It will corrode the joint It results in oxidation of solder It disturbs the chemical bonding take place

5) Why the solvent Iso Propyl Alcohol (IPA) is used on the solder joint?

To help the corrosive action Cleaning before soldering the joint To break down the acid within the joint Remove residual flux and prevent corrosion