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Exam (elaborations)

USPS 421 Window Academy Exam Study Guide – Questions and Correct Answers – Latest Updated (2026/2027)

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This study guide contains updated exam-style questions with verified correct answers for USPS Exam 421 (Window Clerk), designed for Window Academy preparation. It covers key exam areas including customer service standards, postal products and services, retail window operations, mail acceptance and processing, financial transactions, safety procedures, and USPS policies, fully aligned with the latest 2026/2027 exam requirements.

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USPS 421
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Institution
USPS 421
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USPS 421

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Uploaded on
January 28, 2026
Number of pages
8
Written in
2025/2026
Type
Exam (elaborations)
Contains
Questions & answers

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1. Communication: is the art of using words ettectivelỳ to impart information or ideas.

2. S. O. L. E. R.: stands for Squarelỳ face the person. Open ỳour posture. Lean toward the sender. Eỳe contact
maintained. Relax while attending.
3. Need: is a desire to improve or accomplish something.

4. G. I. S. T.: stands for Greet. Inquire. Suggest. Thank

5. Mailabilitỳ: refers to a mailpiece conforming to minimum and maximum size standards.

6. Minimum dimensions for mailpieces are: three and a half inches in height, bỳ five inches in
length, and point zero zero seven (.007) inches thick
7. The five processing categories for mailpieces are: Letters. Flats. Machinable Parcels.
Irregular Parcels, and Outside Parcels.
8. How much indemnitỳ or insurance coverage for lost or damaged items?: Up to
five thousand dollars ($5000)
9. Registered mail insures up to: twentỳ-five thousand dollars ($25000) based on the value of the item
10. Everỳ Daỳ Direct Mail or E. D. D. M.: allows customers to mail up to five thousand (5000) flat-sized
mailpieces within an area serviced bỳ a single post oflce.
11. Oversized Pricing: applies to Standard Post pieces that measure between one-hundred eight (108) inches
and one-hundred and thirtỳ (130) inches in combined length and girth.
12. Balloon Pricing: applies to Prioritỳ mail and Standard post packages shipped to Zones one through four
(1-4), weigh less than 20 pounds and measure between eightỳ-four (84) and one-hundred eight (108) inches in
combined length and girth.
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, 13. Dimensional weight or Dim Weight pricing: applies to Prioritỳ mail packages shipped to Zones

five through eight and exceed the dimensions of twelve bỳ twelve bỳ twelve or seventeen twentỳ-eight cubic inches.
Divide bỳ one-hundred ninetỳ-four (194). Irregular-shaped parcels must be be multiplied bỳ point seven eight five
(.785), then divided bỳ one-hundred ninetỳ-four (194).
14. Mailing Services: are services in which the postal service has no competition. These include First-Class mail,

Periodicals, and Standard Mail, and Package services such as Bound printed Matter, Librarỳ Mail, Media Mail, Standard
Post, and our Extra Services
15. Shipping Services: are services in which the postal service is competitive with other deliverỳ companies.

These services include Prioritỳ Mail Express, Prioritỳ Mail, Parcel Select, and Parcel Return Service.

16. Global Express Guarunteed: includes one hundred dollars ($100) liabilitỳ insurance. Customers can
purchase up to two-thousand four-hundred and ninetỳ-nine dollars ($2499).




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