USPS EXAMS 943, 944 & 945 QUESTIONS & ANSWERS 2026-2027 | … EXAM
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
USPS Exams 943, 944 &
945 Questions &
Answers 2026-2027 |
Comprehensive Postal
Review
Verified Answers Exam Ready With Rationales
44 QUESTIONS
DOCUMENT OVERVIEW
This document contains 44 questions with their correct answers provided, accompanied by
diagrams and images for enhanced understanding. It covers essential concepts related to
postal service exams, ensuring comprehensive review and mastery of the material. This
resource is suitable for study, exam preparation, and certification review for those looking to
succeed in USPS exams 943, 944, and 945.
CONTENTS
Core Principles & Fundamentals Q1–Q15
Essential Concepts & Terms Q16–Q30
Clinical & Practical Applications Q31–Q44
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 44
HC
CORRECT ANSWER
hydrocarbons
Q2 QUESTION 2 OF 44
Hc is caused by
CORRECT ANSWER
Misfire
Q3 QUESTION 3 OF 44
Nox
CORRECT ANSWER
High exhaust temps caused by high combustion temp
Q4 QUESTION 4 OF 44
Egr open
CORRECT ANSWER
Lean
Page 2
, Q5 QUESTION 5 OF 44
Egr closed
CORRECT ANSWER
Rich
Q6 QUESTION 6 OF 44
Rich
CORRECT ANSWER
Black smoke
Q7 QUESTION 7 OF 44
Lean
CORRECT ANSWER
White smoke
Q8 QUESTION 8 OF 44
Secondary spring
CORRECT ANSWER
Goes on first
Q9 QUESTION 9 OF 44
lower ball joint
Page 3
P R O F E S S I O N A L P R A C T I C E M AT E R I A L S
USPS Exams 943, 944 &
945 Questions &
Answers 2026-2027 |
Comprehensive Postal
Review
Verified Answers Exam Ready With Rationales
44 QUESTIONS
DOCUMENT OVERVIEW
This document contains 44 questions with their correct answers provided, accompanied by
diagrams and images for enhanced understanding. It covers essential concepts related to
postal service exams, ensuring comprehensive review and mastery of the material. This
resource is suitable for study, exam preparation, and certification review for those looking to
succeed in USPS exams 943, 944, and 945.
CONTENTS
Core Principles & Fundamentals Q1–Q15
Essential Concepts & Terms Q16–Q30
Clinical & Practical Applications Q31–Q44
Page 1
, E XA M Q U EST I O N S
Q1 QUESTION 1 OF 44
HC
CORRECT ANSWER
hydrocarbons
Q2 QUESTION 2 OF 44
Hc is caused by
CORRECT ANSWER
Misfire
Q3 QUESTION 3 OF 44
Nox
CORRECT ANSWER
High exhaust temps caused by high combustion temp
Q4 QUESTION 4 OF 44
Egr open
CORRECT ANSWER
Lean
Page 2
, Q5 QUESTION 5 OF 44
Egr closed
CORRECT ANSWER
Rich
Q6 QUESTION 6 OF 44
Rich
CORRECT ANSWER
Black smoke
Q7 QUESTION 7 OF 44
Lean
CORRECT ANSWER
White smoke
Q8 QUESTION 8 OF 44
Secondary spring
CORRECT ANSWER
Goes on first
Q9 QUESTION 9 OF 44
lower ball joint
Page 3
