Exam - IPC Training Home Page
Exam - IPC Training Home Page
Exam - IPC Training Home Page
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THROUGH-HOLE REWORK (DVD-41C) v.1<br />
22. Cross contamination can occur when<br />
a. an operator sneezes on an assembly<br />
b. different solder alloys are mixed<br />
c. oils from ungloved hands get on the assembly<br />
d. coffee is spilled on an assembly<br />
23. The visual appearance of the lead free solder joints is<br />
a. smoother than tin-lead<br />
b. grainier than tin-lead<br />
c. shinier than tin-lead<br />
d. wetter than tin-lead<br />
24. The melting temperature for lead free solder is typically<br />
a. 50 degrees C higher than tin-lead<br />
b. 40 degrees C higher than tin-lead<br />
c. 30 degrees C higher than tin-lead<br />
d. 20 degrees C higher than tin-lead<br />
25. In lead free soldering, the more robust fluxes<br />
a. clean surfaces more aggressively<br />
b. assist in heat transfer<br />
c. are harder to clean after soldering<br />
d. all of the above<br />
6
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