USPS Exam 421 Window Clerk 2026-150
QUESTIONS AND ANSWERS ALREADY GRADED A+.
100% Verified Solutions | Updated Per Latest
Guidelines | Graded A+
SECTION 1: MAIL CLASSES & SERVICES
Question 1:
What is the maximum weight for a First-Class Mail letter?
A) 3.5 oz
B) 13 oz
C) 16 oz
D) 70 lbs
Answer: B
Rationale: First-Class Mail letters have a maximum weight of 13 ounces. Anything
over 13 oz must be sent as Priority Mail .
Question 2:
What is the maximum weight for any single mail piece?
A) 50 lbs
B) 70 lbs
C) 100 lbs
D) 130 lbs
Answer: B
Rationale: No mail piece can weigh more than 70 lbs except for Standard Post .
,Question 3:
Express Mail is delivered in how many days?
A) 1-2 days
B) 2-3 days
C) 3-5 days
D) Overnight/next day
Answer: A
Rationale: Express Mail (now called Priority Mail Express) guarantees overnight or
next-day delivery with $100 insurance and free tracking .
Question 4:
What is the maximum weight for a machinable parcel?
A) 13 oz
B) 25 lbs
C) 50 lbs
D) 70 lbs
Answer: B
Rationale: A machinable parcel cannot weigh more than 25 lbs .
Question 5:
What is the minimum length for a letter?
A) 3.5 inches
B) 5 inches
C) 6 inches
D) 11.5 inches
Answer: B
Rationale: The minimum length for a letter is 5 inches, and the minimum height is
3.5 inches .
,Question 6:
What is the maximum size for a flat (large envelope)?
A) 12" x 15"
B) 11.5" x 6.125"
C) 15" x 12" x 0.75"
D) 13" x 15"
Answer: C
Rationale: The maximum size for a flat is 15" long, 12" high, and 0.75" thick .
Question 7:
What is the minimum size for a postcard?
A) 3" x 4"
B) 3.5" x 5"
C) 4" x 6"
D) 5" x 7"
Answer: B
Rationale: The minimum size of a postcard is the same as a letter: 3.5" x 5" .
Question 8:
What service guarantees overnight delivery and includes $100 insurance?
A) Priority Mail
B) Express Mail
C) First-Class Mail
D) Parcel Select
Answer: B
Rationale: Express Mail (Priority Mail Express) guarantees overnight or next-day
delivery with $100 insurance and free tracking .
, Question 9:
What is Priority Mail's delivery timeframe?
A) Overnight
B) 1-2 days
C) 2-3 days
D) 3-5 days
Answer: C
Rationale: Priority Mail is a premier shipping service with 2-3 DAYS delivery and up
to 70 lbs with $50 insurance .
Question 10:
What does EDDM stand for?
A) Every Day Direct Mail
B) Every Door Direct Mail
C) Electronic Data Delivery Mail
D) Express Domestic Delivery Mail
Answer: B
Rationale: EDDM stands for Every Door Direct Mail, a service for businesses to
send mail to every address on a carrier route .
Question 11:
What surcharge applies to items/parcels over 108 inches but no more than 130
inches in combined length and girth?
A) Nonmachinable surcharge
B) Oversize surcharge
C) Dimensional pricing
D) Hazardous material surcharge
Answer: B
Rationale: An oversize/parcel post surcharge applies to items over 108 inches but
no more than 130 inches in combined length and girth .
QUESTIONS AND ANSWERS ALREADY GRADED A+.
100% Verified Solutions | Updated Per Latest
Guidelines | Graded A+
SECTION 1: MAIL CLASSES & SERVICES
Question 1:
What is the maximum weight for a First-Class Mail letter?
A) 3.5 oz
B) 13 oz
C) 16 oz
D) 70 lbs
Answer: B
Rationale: First-Class Mail letters have a maximum weight of 13 ounces. Anything
over 13 oz must be sent as Priority Mail .
Question 2:
What is the maximum weight for any single mail piece?
A) 50 lbs
B) 70 lbs
C) 100 lbs
D) 130 lbs
Answer: B
Rationale: No mail piece can weigh more than 70 lbs except for Standard Post .
,Question 3:
Express Mail is delivered in how many days?
A) 1-2 days
B) 2-3 days
C) 3-5 days
D) Overnight/next day
Answer: A
Rationale: Express Mail (now called Priority Mail Express) guarantees overnight or
next-day delivery with $100 insurance and free tracking .
Question 4:
What is the maximum weight for a machinable parcel?
A) 13 oz
B) 25 lbs
C) 50 lbs
D) 70 lbs
Answer: B
Rationale: A machinable parcel cannot weigh more than 25 lbs .
Question 5:
What is the minimum length for a letter?
A) 3.5 inches
B) 5 inches
C) 6 inches
D) 11.5 inches
Answer: B
Rationale: The minimum length for a letter is 5 inches, and the minimum height is
3.5 inches .
,Question 6:
What is the maximum size for a flat (large envelope)?
A) 12" x 15"
B) 11.5" x 6.125"
C) 15" x 12" x 0.75"
D) 13" x 15"
Answer: C
Rationale: The maximum size for a flat is 15" long, 12" high, and 0.75" thick .
Question 7:
What is the minimum size for a postcard?
A) 3" x 4"
B) 3.5" x 5"
C) 4" x 6"
D) 5" x 7"
Answer: B
Rationale: The minimum size of a postcard is the same as a letter: 3.5" x 5" .
Question 8:
What service guarantees overnight delivery and includes $100 insurance?
A) Priority Mail
B) Express Mail
C) First-Class Mail
D) Parcel Select
Answer: B
Rationale: Express Mail (Priority Mail Express) guarantees overnight or next-day
delivery with $100 insurance and free tracking .
, Question 9:
What is Priority Mail's delivery timeframe?
A) Overnight
B) 1-2 days
C) 2-3 days
D) 3-5 days
Answer: C
Rationale: Priority Mail is a premier shipping service with 2-3 DAYS delivery and up
to 70 lbs with $50 insurance .
Question 10:
What does EDDM stand for?
A) Every Day Direct Mail
B) Every Door Direct Mail
C) Electronic Data Delivery Mail
D) Express Domestic Delivery Mail
Answer: B
Rationale: EDDM stands for Every Door Direct Mail, a service for businesses to
send mail to every address on a carrier route .
Question 11:
What surcharge applies to items/parcels over 108 inches but no more than 130
inches in combined length and girth?
A) Nonmachinable surcharge
B) Oversize surcharge
C) Dimensional pricing
D) Hazardous material surcharge
Answer: B
Rationale: An oversize/parcel post surcharge applies to items over 108 inches but
no more than 130 inches in combined length and girth .
