USPS EXAM 421 WINDOW CLERK TEST STUDY GUIDE
QUESTIONS AND VERIFIED ANSWERS/ A+ GRADE
1. MAILABILITY: DETERMINING IF AN ITEM PRESENTED FOR MAILING CAN
BE ADMITTED INTO MAILSTREAM IS AN IMPORTANT PART OF YOUR JOB.
2. FCM: FIRST-CLASS MAIL
3. NONMAILABLE: MEANS THE PIECE, AS DESIGNED, IS PROHIBITED FROM
THE MAILSTREAM.
4. ALL MAILPIECES ENTERING THE MAILSTREAM ARE SEPARATED
INTO ONE OF THESE THREE PROCESSING CATEGORIES: LETTERS.term-
4 FLATS.
PARCELS (MACHINABLE, IRREGULAR, NONMACHINABLE PARCEL).
5. NONMACHINABLE LETTER CHARACTERISTICS: FCM LETTER-SIZED
PIECES THAT MEET ONE OR MORE NONMACHINABLE CHARACTERISTICS
ARE EXCLUDED FROM AUTOMATED PROCESSING, THEY ARE HANDLED
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, MANUALLY & SUBJECT TO SURCHARGE. THIS DOES NOT APPLY TO POST-
CARDS.
6. THREE TYPES OF PARCELS: MACHINABLE, IRREGULAR, & NONMACHIN-
ABLE
7. MACHINABLE PARCELS MUST WEIGHT AT LEAST OUNCES,
BUT NO MORE THAN .: SIX; 25
8. IRREGULAR PARCELS CHARACTERISTICS: ROLLS & TUBES 26" LONG OR
LESS
LESS THAN 6"L X 3"H. LESS
THAN 6 OUNCES.
9. HAZMAT QUESTION: "DOES YOUR ITEM CONTAIN ANYTHING LIQUID,
FRAGILE, PERISHABLE, OR POTENTIALLY HAZARDOUS SUCH AS LITHIUM,
BATTERIES, OR MERCURY?"
10. POSTER 138: TO ASSIST WITH DETERMINING IF A CUSTOMER'S PACK-
AGE MAY BE ACCEPTED.
11. CONSUMER COMMODITY: CLASS 2: GLASS
CLASS 3: FLAMMABLE/COMBUSTIBLE LIQUIDS
CLASS 4: FLAMMABLE SOLIDS
CLASS 6: TOXIC MATERIALS
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QUESTIONS AND VERIFIED ANSWERS/ A+ GRADE
1. MAILABILITY: DETERMINING IF AN ITEM PRESENTED FOR MAILING CAN
BE ADMITTED INTO MAILSTREAM IS AN IMPORTANT PART OF YOUR JOB.
2. FCM: FIRST-CLASS MAIL
3. NONMAILABLE: MEANS THE PIECE, AS DESIGNED, IS PROHIBITED FROM
THE MAILSTREAM.
4. ALL MAILPIECES ENTERING THE MAILSTREAM ARE SEPARATED
INTO ONE OF THESE THREE PROCESSING CATEGORIES: LETTERS.term-
4 FLATS.
PARCELS (MACHINABLE, IRREGULAR, NONMACHINABLE PARCEL).
5. NONMACHINABLE LETTER CHARACTERISTICS: FCM LETTER-SIZED
PIECES THAT MEET ONE OR MORE NONMACHINABLE CHARACTERISTICS
ARE EXCLUDED FROM AUTOMATED PROCESSING, THEY ARE HANDLED
1/6
, MANUALLY & SUBJECT TO SURCHARGE. THIS DOES NOT APPLY TO POST-
CARDS.
6. THREE TYPES OF PARCELS: MACHINABLE, IRREGULAR, & NONMACHIN-
ABLE
7. MACHINABLE PARCELS MUST WEIGHT AT LEAST OUNCES,
BUT NO MORE THAN .: SIX; 25
8. IRREGULAR PARCELS CHARACTERISTICS: ROLLS & TUBES 26" LONG OR
LESS
LESS THAN 6"L X 3"H. LESS
THAN 6 OUNCES.
9. HAZMAT QUESTION: "DOES YOUR ITEM CONTAIN ANYTHING LIQUID,
FRAGILE, PERISHABLE, OR POTENTIALLY HAZARDOUS SUCH AS LITHIUM,
BATTERIES, OR MERCURY?"
10. POSTER 138: TO ASSIST WITH DETERMINING IF A CUSTOMER'S PACK-
AGE MAY BE ACCEPTED.
11. CONSUMER COMMODITY: CLASS 2: GLASS
CLASS 3: FLAMMABLE/COMBUSTIBLE LIQUIDS
CLASS 4: FLAMMABLE SOLIDS
CLASS 6: TOXIC MATERIALS
2/6
