USPS Error Detection Test Barcode and Labeling Issues Questions and Answers 1

Question 1

A mail processing machine repeatedly fails to scan the Intelligent Mail barcode (IMb) on a series of letters. Upon inspection, the barcode itself is clear and well-printed, but a company logo is printed very close to the left and right edges of the barcode. What is the most likely cause of this scanning failure?

Accepted Answer

The "quiet zone" around the barcode has been violated.

Answer

USPS standards require a clear area, known as the "quiet zone," around all sides of a barcode to ensure it can be read properly by automated equipment. Any printing, such as a logo, that encroaches on this space can interfere with the scanner's ability to identify the beginning and end of the barcode, leading to read failures.

Question 2

A mailpiece label shows a barcode where the vertical bars have bled together, obscuring the clear separation between them. This issue, often caused by using the wrong label material or excessive ink, is best described as which of the following?

Accepted Answer

Barcode smearing or smudging

Answer

Smearing or smudging occurs when ink spreads or bleeds, causing the bars and spaces of a barcode to lose their distinct edges. Automated scanners rely on precise bar and space widths to decode the information, and when these are obscured, the barcode becomes unreadable.

Question 3

Which of the following label characteristics would most likely result in a "low print contrast" error during an automated barcode scan?

Accepted Answer

Dark blue bars printed on a dark green background.

Answer

Barcode scanners require a significant difference in reflectance, known as Print Reflectance Difference (PRD), between the dark bars and the light background. Printing dark bars (like blue) on another dark background (like green) minimizes this contrast, making it difficult for the scanner to distinguish the bars from the spaces.

Question 4

A package handler notices that a shipping label with its tracking barcode has been placed directly over a seam of a cardboard box. Why is this specific placement a potential issue for automated processing?

Accepted Answer

The uneven surface of the seam can distort the barcode, leading to a misread.

Answer

Placing a barcode over a seam, edge, or bulge creates an uneven surface that can distort the flat, linear nature of the barcode. Automated laser scanners need to read the barcode on a flat plane; any distortion can prevent an accurate read as the package moves through the sorting equipment.

Question 5

A mailer uses a standard UPC barcode, typically found on retail products, on a package intended for USPS shipment, believing it can serve as a tracking number. This will cause a processing error because the barcode:

Accepted Answer

symbology is incorrect for USPS mail processing.

Answer

The USPS uses specific barcode formats, or 'symbologies,' such as the Intelligent Mail package barcode (IMpb) which is based on the GS1-128 specification. A UPC barcode is a different symbology designed for retail and does not contain the specific routing and tracking information required by the USPS automated mail processing systems.

USPS Error Detection Test Practice Test

USPS Error Detection Test Practice Test

USPS Error Detection Test Barcode and Labeling Issues Questions and Answers 1