USPS EXAM 943, 944 & 945 2025| BRAND
NEW ACTUAL EXAM WITH 100% VERIFIED
QUESTIONS AND CORRECT SOLUTIONS|
GUARANTEED VALUE PACK| ACE YOUR
GRADES.
1. HC - correct answer - hydrocarbons
2. Hc is caused by - correct answer - Misfire
, Page | 2
3. Nox - correct answer - High exhaust temps caused by high
combustion temp
4. Egr open - correct answer - Lean
5. Egr closed - correct answer - Rich
6. Rich - correct answer - Black smoke
7. Lean - correct answer - White smoke
8. Secondary spring - correct answer - Goes on first
9. lower ball joint - correct answer - Load bearing