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Acceptability of Electronic Assemblies Flashcards

7 cards from real CIT practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. In IPC-A-610, what is the primary distinction between Class 1 and Class 2 product categories?

    Answer: Class 1 is for consumer products with basic reliability; Class 2 is for dedicated service electronics

    Class 1 covers general electronics with basic reliability requirements, while Class 2 covers dedicated service products requiring longer life.

  2. A solder bridge connecting two adjacent lands on a Class 2 PCB is classified as:

    Answer: A defect

    Solder bridges that create unintended electrical connections between conductors are defects for all classes.

  3. Per IPC-A-610, which type of component tombstoning is considered a defect?

    Answer: One end of the component lifted off its land

    Tombstoning — where one end of a chip component lifts completely off its land — is a defect for all classes.

  4. Which IPC-A-610 criterion applies when evaluating the acceptability of a solder joint on a connector with press-fit contacts?

    Answer: Press-fit connections require no solder; visual mechanical seating criteria apply

    Press-fit contacts are designed to make gas-tight connections without solder; IPC-A-610 evaluates mechanical seating.

  5. According to IPC-A-610, exposed copper on a conductor (nick or scrape) that does not reduce the conductor width below minimum is classified as:

    Answer: Acceptable if treated with compatible coating

    Exposed copper nicks are acceptable when the conductor width is maintained and the exposed area is coated with compatible material.

  6. IPC-A-610 defines 'workmanship standards' primarily based on which document hierarchy?

    Answer: Customer drawing supersedes IPC-A-610, which supersedes company standards

    Per IPC-A-610, the customer drawing or purchase order takes precedence, followed by IPC-A-610, then company workmanship standards.

  7. A chip resistor's end termination has less than 75% wetting on the side fillet for a Class 3 assembly. Per IPC-A-610, this is:

    Answer: A defect

    Class 3 requires at least 75% termination height wetting on the side fillet; less than this is a defect.