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Detecting Sorting Errors Flashcards

7 cards from real USPS 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. A package is addressed to '742 Evergreen Terrace, Springfield, IL 62704' but was sorted to the bin for ZIP code 62740. What type of error occurred?

    Answer: ZIP code digit transposition error

    The package was sorted to 62740 instead of 62704, which is a transposition of the last two digits causing a wrong-bin sort.

  2. During a manual sort, a letter addressed to 'Houston, TX' is placed in the carrier route tray for 'Austin, TX'. This is best described as:

    Answer: A city-level misdirection error

    Placing mail destined for Houston into an Austin tray is a city-level misdirection error affecting an entire metropolitan area.

  3. A sorter notices that every piece of mail for '94102' was placed in the bin labeled '94120'. Both ZIPs are in San Francisco. What is the most likely consequence?

    Answer: Delayed delivery requiring re-sorting at the destination facility

    Mail sorted to the wrong ZIP bin within the same city must be identified and re-sorted, causing delivery delays.

  4. Which detail on a mailpiece should a sorter check FIRST to confirm correct bin placement?

    Answer: Destination ZIP code

    The destination ZIP code is the primary routing indicator and should be verified first when confirming correct bin placement.

  5. A flat is labeled '3rd Floor, 500 Main St, Denver, CO 80203' but was sorted with mail for '500 Main St, Denver, CO 80203' without floor distinction. What error risk does this create?

    Answer: Secondary address unit missing, risking misdelivery within the building

    Omitting the secondary address (floor/suite/unit) from sort consideration risks the carrier delivering to the wrong unit within the building.

  6. An OCR machine reads '8OO Main St' (with letter O instead of zero) and routes the piece incorrectly. This is an example of:

    Answer: A character recognition error affecting sort accuracy

    OCR machines can misread characters like letter O for zero, causing the piece to be routed to an incorrect address or ZIP.

  7. Mail for Route 7 is mistakenly placed in the Route 1 tray. A clerk catches this before dispatch. What is the correct action?

    Answer: Transfer the mail to the correct Route 7 tray immediately

    Misrouted mail caught before dispatch should be immediately transferred to the correct carrier route tray to prevent delivery failure.