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THROUGH-HOLE REWORK (DVD-41C) v.1 8. The solder braid is used to a. remove solder from the joint b. create more professional looking solder joints c. assist in heart transfer d. apply the flux more evenly 9. The vacuum extractor is used to a. remove solder from the joint b. create more professional looking solder joints c. assist in heart transfer d. apply the flux more evenly 10. Tip selection for the vacuum extractor is based upon a. the shape of the soldered lead b. the diameter of the soldered lead c. the size of the land d. all of the above 11. The vacuum switch is pressed on the vacuum extractor a. immediately after the lead comes loose b. after the extractor tip is placed on the joint c. when complete solder melt is achieved d. before the extractor tip is placed on the joint 12. The purpose of continuing to press the vacuum switch after the solder is removed a. is to distribute the flux evenly b. is to cool the metals inside the hole c. is to repair any damage done to the land d. is to allow the solder to dissipate inside the extractor 13. A sweat joint occurs when a. a bead of water appears on the joint after the extraction process b. the soldering temperature is too high c. flux remains after the extraction process d. the joint isn’t properly cooled and the residual solder bonds to the lead 14. A partially clinched lead should be straightened by a. placing a chisel tip beneath the lead and applying upward pressure b. using needle nose pliers to twist the lead and bend it up c. using a vacuum extractor to melt the solder, then bend the lead upright d. any of the above 4
THROUGH-HOLE REWORK (DVD-41C) v.1 15. To straighten a fully clinched lead a. use a thermal parting tool with a flat tip b. use a chisel tip on a hand soldering iron c. use a vacuum, extractor and pliers d. any of the above 16. The main functional difference between desoldering DIP and axial components is a. DIP components contain ICs b. DIP components have flat leads c. vacuum extractors cannot be used on DIP components d. there are no polarity markings on axial components 17. In order to avoid potential heat damage to the board when desoldering DIPs a. skip around as you desolder the leads b. desolder in a continuous line starting at the corners c. desolder in a continuous line starting in the middle d. the order in which leads are desoldered is not a factor in heat damage to the board 18. If you’re having trouble desoldering, it can be helpful to a. significantly raise the temperature of the vacuum extractor b. use a solder braid in addition to the extractor c. use an auxiliary heating source on the opposite side of the board d. all of the above 19. To correct a solder bridging condition a. place a chisel tip on the solder bridge and reheat both joints completely b. use a solder braid to desolder the bridge and the affected joints, then resolder the joints c. remove the bridge with a vacuum extractor, then resolder the joints d. all of the above 20. The easiest way to remove unacceptable solder icicles is to use a a. solder braid b. hand soldering iron and a small amount of flux c. vacuum extractor d. thermal parting tool 21. The easiest and fastest method to remove excess solder is to use a a. hand soldering iron and a small amount of flux b. vacuum extractor c. thermal parting tool d. solder braid 5
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