USPS Exams 943, 944, 945 Actual Exam Questions
And Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf.
SECTION 1: Exam Overview and Position Classification
1. Exam 943 is used to hire which type of USPS maintenance position?
A. Maintenance Support Clerk
B. Automotive Mechanics responsible for routine maintenance and repair
C. Automotive Technicians responsible for complex repairs
D. Mail Processing Equipment Mechanics
Answer: B. Automotive Mechanics responsible for routine maintenance and
repair
Rationale: Exam 943 is a technical test used to hire Automotive Mechanics who
perform routine types of maintenance and repair on USPS vehicles. Exam 944 is
used for Automotive Technicians who handle more complex maintenance and
repair .
2. Exam 944 is used to hire which type of USPS maintenance position?
A. Automotive Mechanics for routine repairs
B. Automotive Technicians for complex maintenance and repair
C. Maintenance Support Clerks
D. Building Maintenance Technicians
Answer: B. Automotive Technicians for complex maintenance and repair
Rationale: Exam 944 is used to hire Automotive Technicians who are responsible
for more complex types of maintenance and repair on USPS vehicles .
,3. What is the primary difference between the responsibilities of Exam 943 and
Exam 944 positions?
A. Exam 943 positions work on mail processing equipment; Exam 944 positions
work on vehicles
B. Exam 943 positions handle routine maintenance; Exam 944 positions handle
complex repairs
C. Exam 943 positions are entry-level; Exam 944 positions are supervisory
D. There is no difference
Answer: B. Exam 943 positions handle routine maintenance; Exam 944 positions
handle complex repairs
Rationale: Exam 943 is for Automotive Mechanics who perform routine types of
maintenance and repair. Exam 944 is for Automotive Technicians who handle more
complex maintenance and repair .
4. What does "HC" stand for in automotive emissions testing?
A. High Compression
B. Hydrocarbons
C. Heat Cycle
D. Hydraulic Control
Answer: B. Hydrocarbons
Rationale: HC refers to hydrocarbons, which are unburned fuel molecules in
exhaust emissions. They are a key measure of combustion efficiency .
5. What is the passing score requirement for USPS maintenance exams?
A. 60%
B. 70%
C. 80%
D. 90%
,Answer: B. 70%
Rationale: According to USPS guidelines, candidates must score at least 70% to
pass the Virtual Entry Assessment and other postal exams .
SECTION 2: Brake Systems
6. Which condition results when a brake drum is out of round?
A. Low pedal
B. Spongy pedal
C. High pedal
D. Pulsating pedal
E. Hard pedal
Answer: D. Pulsating pedal
Rationale: An out-of-round brake drum creates uneven contact between the brake
shoes and the drum surface during rotation. This causes the brake pedal to pulsate
or vibrate when applied, as the shoes alternately contact high and low spots on
the drum .
7. What causes a soft, spongy brake pedal?
A. Bent caliper retainer
B. Air in the hydraulic system
C. Warped rotors
D. Worn brake pads
E. Glazed brake linings
Answer: B. Air in the hydraulic system
Rationale: Air in the hydraulic system compresses instead of transmitting hydraulic
pressure, resulting in a soft, spongy pedal feel. Air must be removed through
proper brake bleeding procedures .
, 8. A pulsating brake pedal during normal driving is MOST likely caused by:
A. Worn brake pads
B. Air in the brake lines
C. Warped brake rotors
D. Low brake fluid
Answer: C. Warped brake rotors
Rationale: Warped brake rotors cause thickness variation that creates pedal
pulsation during braking. This is one of the most common brake system
complaints .
9. What is the minimum safe thickness for brake pads?
A. 0.5 mm
B. 2 mm
C. 3 mm
D. 4 mm
E. 5 mm
Answer: B. 2 mm
Rationale: Brake pads at or below 2 mm thickness are considered unsafe and
require replacement. The friction material becomes too thin to provide adequate
stopping power and may cause metal-to-metal contact, damaging the rotors .
10. The parking brake typically operates which braking system?
A. Front disc brakes only
B. Rear brakes only
C. All four wheels equally
D. Hydraulic system
E. ABS system
And Correct Answers (Verified Answers) Plus
Rationales 2026 Q&A | Instant Download Pdf.
SECTION 1: Exam Overview and Position Classification
1. Exam 943 is used to hire which type of USPS maintenance position?
A. Maintenance Support Clerk
B. Automotive Mechanics responsible for routine maintenance and repair
C. Automotive Technicians responsible for complex repairs
D. Mail Processing Equipment Mechanics
Answer: B. Automotive Mechanics responsible for routine maintenance and
repair
Rationale: Exam 943 is a technical test used to hire Automotive Mechanics who
perform routine types of maintenance and repair on USPS vehicles. Exam 944 is
used for Automotive Technicians who handle more complex maintenance and
repair .
2. Exam 944 is used to hire which type of USPS maintenance position?
A. Automotive Mechanics for routine repairs
B. Automotive Technicians for complex maintenance and repair
C. Maintenance Support Clerks
D. Building Maintenance Technicians
Answer: B. Automotive Technicians for complex maintenance and repair
Rationale: Exam 944 is used to hire Automotive Technicians who are responsible
for more complex types of maintenance and repair on USPS vehicles .
,3. What is the primary difference between the responsibilities of Exam 943 and
Exam 944 positions?
A. Exam 943 positions work on mail processing equipment; Exam 944 positions
work on vehicles
B. Exam 943 positions handle routine maintenance; Exam 944 positions handle
complex repairs
C. Exam 943 positions are entry-level; Exam 944 positions are supervisory
D. There is no difference
Answer: B. Exam 943 positions handle routine maintenance; Exam 944 positions
handle complex repairs
Rationale: Exam 943 is for Automotive Mechanics who perform routine types of
maintenance and repair. Exam 944 is for Automotive Technicians who handle more
complex maintenance and repair .
4. What does "HC" stand for in automotive emissions testing?
A. High Compression
B. Hydrocarbons
C. Heat Cycle
D. Hydraulic Control
Answer: B. Hydrocarbons
Rationale: HC refers to hydrocarbons, which are unburned fuel molecules in
exhaust emissions. They are a key measure of combustion efficiency .
5. What is the passing score requirement for USPS maintenance exams?
A. 60%
B. 70%
C. 80%
D. 90%
,Answer: B. 70%
Rationale: According to USPS guidelines, candidates must score at least 70% to
pass the Virtual Entry Assessment and other postal exams .
SECTION 2: Brake Systems
6. Which condition results when a brake drum is out of round?
A. Low pedal
B. Spongy pedal
C. High pedal
D. Pulsating pedal
E. Hard pedal
Answer: D. Pulsating pedal
Rationale: An out-of-round brake drum creates uneven contact between the brake
shoes and the drum surface during rotation. This causes the brake pedal to pulsate
or vibrate when applied, as the shoes alternately contact high and low spots on
the drum .
7. What causes a soft, spongy brake pedal?
A. Bent caliper retainer
B. Air in the hydraulic system
C. Warped rotors
D. Worn brake pads
E. Glazed brake linings
Answer: B. Air in the hydraulic system
Rationale: Air in the hydraulic system compresses instead of transmitting hydraulic
pressure, resulting in a soft, spongy pedal feel. Air must be removed through
proper brake bleeding procedures .
, 8. A pulsating brake pedal during normal driving is MOST likely caused by:
A. Worn brake pads
B. Air in the brake lines
C. Warped brake rotors
D. Low brake fluid
Answer: C. Warped brake rotors
Rationale: Warped brake rotors cause thickness variation that creates pedal
pulsation during braking. This is one of the most common brake system
complaints .
9. What is the minimum safe thickness for brake pads?
A. 0.5 mm
B. 2 mm
C. 3 mm
D. 4 mm
E. 5 mm
Answer: B. 2 mm
Rationale: Brake pads at or below 2 mm thickness are considered unsafe and
require replacement. The friction material becomes too thin to provide adequate
stopping power and may cause metal-to-metal contact, damaging the rotors .
10. The parking brake typically operates which braking system?
A. Front disc brakes only
B. Rear brakes only
C. All four wheels equally
D. Hydraulic system
E. ABS system
