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Component Identification & Handling Flashcards

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

Read the first 7 Component Identification & Handling flashcards as text

  1. What does MSL 3 indicate for a moisture-sensitive component?

    Answer: The component must be stored at 30°C/60% RH and used within 168 hours of opening

    MSL 3 per J-STD-020 allows a floor life of 168 hours at ≤30°C/60% RH after removal from dry packaging before soldering must occur.

  2. Which marking system is used on SMD resistors to identify their value in a three-digit code, such as '472'?

    Answer: Standard three-digit EIA code where the third digit is the multiplier

    In the standard three-digit SMD marking, the first two digits are significant figures and the third is the power-of-10 multiplier, so '472' = 47 × 10² = 4,700 ohms.

  3. What is the significance of a white dot or painted stripe on an electrolytic capacitor?

    Answer: It indicates the negative terminal

    On electrolytic capacitors, the stripe or marking (often white or colored) indicates the negative terminal, which must be oriented correctly to prevent component failure.

  4. How should tape-and-reel packaged components be stored when not in use to preserve component quality?

    Answer: Resealed in moisture barrier bags with desiccant if MSDs, stored in controlled conditions

    Unused tape-and-reel MSDs should be resealed in moisture barrier bags with fresh desiccant and humidity indicator cards, stored per J-STD-033 requirements.

  5. What does the 'JEDEC' polarity marking on a SOT-23 transistor package typically consist of?

    Answer: A molded dot or alphanumeric code on the package surface

    SOT-23 packages use a molded dot, embossed mark, or alphanumeric date/type code on the package surface to identify pin orientation per JEDEC TO-236 standards.

  6. Which of the following describes 'counterfeit component' indicators that should prompt rejection?

    Answer: Mismatched lot codes, sanded or re-marked surfaces, and inconsistent font styles

    Counterfeit indicators include sanded or blacktopped surfaces (signs of re-marking), inconsistent fonts, mismatched lot codes, and anomalies detectable under magnification per AS6081.

  7. A component's date code reads '2247'. What does this indicate?

    Answer: The component was manufactured in 2022, week 47

    A four-digit YYWW date code of '2247' means the component was manufactured in year 2022, week 47 — a standard industry convention for traceability.