USPS Maintenance & Mechanics 2

Question 1

A maintenance log entry reads: 'Replaced conveyor belt drive motor on Unit 4B.
Motor model: 3HP-208V-60Hz.
Installation date: 03/14/2026.
Torque spec: 45 ft-lbs.
Completed by: Tech J.
Harmon.' Which field contains an error if the facility runs on 480V three-phase power?

Accepted Answer

Motor model voltage rating

Answer

Installation date

Answer

Torque specification

Answer

Technician name

Question 2

A work order states: 'Lubricate all conveyor chain links using SAE 30 oil every 500 hours.' The equipment manual specifies chain lubrication every 250 hours with ISO 220 gear oil. What is the error in the work order?

Accepted Answer

Both the interval and lubricant type

Answer

The lubricant type only

Answer

The interval only

Answer

There is no error — SAE 30 is equivalent to ISO 220

Question 3

A parts request form lists: 'Item: Conveyor roller bearing. Part #: 6205-2RS. Qty: 12. Unit cost: $4.80. Total: $57.60.' What is the arithmetic error in this form?

Accepted Answer

No arithmetic error — $57.60 is correct

Answer

The total should be $48.00, not $57.60

Answer

The total should be $62.40, not $57.60

Answer

The part number format is wrong

Question 4

A safety inspection checklist entry reads: 'Fire extinguisher Station 7: Last inspected 11/2025. Next inspection due: 11/2027.' If USPS policy requires annual fire extinguisher inspections, what is the error?

Accepted Answer

The next inspection due date should be 11/2026, not 11/2027

Answer

The inspection station number

Answer

The last inspection date

Answer

There is no error — biennial inspection is standard

Question 5

A repair record states: 'Flat belt replaced on sorter #3. Belt dimensions: 6 inches wide × 48 feet long. Tension set to 120 PSI. Belt speed: 250 FPM.' The technician's manual states belt tension should be 80–100 PSI. What error is present?

Accepted Answer

Belt tension exceeds the specified range

Answer

Belt width is incorrect

Answer

Belt speed is too high

Answer

Belt length is inconsistent with sorter #3 specs

Question 6

A maintenance schedule shows Machine A receives a full inspection every 1,000 hours. The machine's current meter reads 7,340 hours, and the last full inspection was at 6,500 hours. According to the schedule, is an inspection overdue?

Accepted Answer

No — the next inspection is due at 7,500 hours and the meter reads 7,340

Answer

Yes — it was due at 7,000 hours

Answer

Yes — an inspection is overdue by 340 hours

Answer

No — inspections reset only at shift change

Question 7

A work order requests replacement of a 15-amp circuit breaker with a 20-amp breaker because 'the 15-amp breaker keeps tripping.' What is the likely error in this corrective action?

Accepted Answer

Increasing breaker amperage without diagnosing the root cause may create a fire hazard

Answer

Circuit breakers cannot be replaced in a postal facility

Answer

A 20-amp breaker is always too large for postal equipment

Answer

Work orders cannot specify electrical repairs