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A comprehensive set of questions and answers related to the j-std (joint standards) for electronics manufacturing. It covers various aspects of electronics product classes, defect criteria, material requirements, and soldering processes. The content is structured to test and reinforce understanding of key concepts and standards within the electronics industry, making it a valuable resource for professionals and students in the field. It includes topics such as ipc standards, acceptable process departures, defect classifications, and requirements for materials like lead-free solder and fluxes. The document also addresses component handling, gold removal processes, and quality control measures.
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END OF IPC stands for... - ANSWERS-The Institute for Interconnecting and Packaging Electronic Circuits 1.3 - Class 1 Electronics - ANSWERS-General Electronics Product ~$1- $100 value 1.3 - Class 2 Electronics - ANSWERS-Dedicated Service Electronic Products ~$100-$20, 1.3 - Class 3 Electronics - ANSWERS-High Performance/Harsh Environment Products ~$20,000 and up 1.5 - What does NAPD stand for? - ANSWERS-No Standard Exists Acceptable Process Departure, needs corrected Defect 1.5 - A1P2D3 - ANSWERS-Class 1 Acceptable Class 2 Process Departure
END OF Class 3 Defect 1.5 - N1D2D3 - ANSWERS-Class 1 No Standard Exists Class 2 Defect Class 3 Defect 1.5 - D1D2D3 - ANSWERS-Class 1 Defect Class 2 Defect Class 3 Defect 1.7.1 - Conflict between J-STD Text and applicable document cited in J- STD, which takes precedent? - ANSWERS-J-STD text 1.7.1 - Conflict between J-STD Text and assembly drawing/documentation not approved by User, which takes precedent? - ANSWERS-J-STD 1.7.1 - Conflict between J-STD Text and assembly drawing/documentation approved by User, which takes precedent? - ANSWERS-Assembly Drawing or Documentation
END OF 1.9 - What does COTS stand for? - ANSWERS-Commercial Off The Shelf 1.13.2.3 - There Shall be no broken strands for wires used at a potential of... - ANSWERS-6kV or greater 3.2.1 - Lead Free solder contains... - ANSWERS-Less than 0.1% Pb (Lead) 3.2.2 - Sn60Pb40 - ANSWERS-60% tin 40% Lead 3.2.2 - Sn62Pb36Ag2 - ANSWERS-62% tin 36% lead 2% silver 3.2.2 - Sn63Pb37 - ANSWERS-63% tin 37% lead 3.2.2 - Solder used for preconditioning, gold removal, tinning of parts, or machine soldering shall... - ANSWERS-Be analyzed, replaced, or replenished at a frequency that to ensure compliance. 3.2.2 - If contamination exceeds the limits ... - ANSWERS-intervals between analysis, replacement or replenishment shall be shortened.
END OF 3.2.2 - Records containing the results of all analyses and solder bath usage shall be maintained for... - ANSWERS-A minimum of 1 year for each process/system 3.3 - Flux shall conform to Flux activity levels ... - ANSWERS-L0 and L1 of flux materials RO, RE, OR, except ORL1 shall not be used for no- clean soldering. 3.3 - RO Flux - ANSWERS-Rosin Flux 3.3 - RE Flux - ANSWERS-Resin Flux 3.3 - OR Flux - ANSWERS-Organic Flux 3.3.1 - When external flux is used with flux cored solder the fluxes shall be... - ANSWERS-compatible both from cleaning process standpoint and chemical standpoint. 3.8.1 - Minor surface flaws, discoloration, meniscus cracks, or chips in component bodies are... - ANSWERS-Acceptable, however they shall
END OF 4.5.1 - Gold must be removed from at least... - ANSWERS-95% of all the surfaces to be soldered of all through-hole components to be hand soldered. 4.5.1 - Gold must be removed from at least... - ANSWERS-95% of all the surface mounted components regardless off gold thickness 4.5.1 - Gold must be removed from at least... - ANSWERS-95% of all the surfaces to be soldered of through-hole components with >2.54 um gold thickness. 4.5.1 - Double tinning process or dynamic solderwave maybe be used for... - ANSWERS-Gold Removal prior to mount components. 4.5.1 - Gold embrittlement can occur regardless ofgold thickness when...