USPS 955 Exam - Practice Test, Study Guide & Interview Prep (2026)

Postal Exam 955 is administered through the USPS Maintenance Selection System and consists of two timed parts:

1. Multicraft Test - 60 minutes covering mechanical and electrical job knowledge across eight content areas
2. Spatial Relations Test - 40-60 minutes covering visual pattern matching and 3D figure visualization

Candidates receive a test invitation from USPS after submitting a job application and clearing an initial eligibility review. The exam is taken in-person at a designated USPS testing center - bring a government-issued photo ID and your assessment login credentials.

Scoring: A score of 70 or higher (excluding Veterans' Preference points) is required to pass. A score below 70 results in an "Ineligible" status and a mandatory 6-month wait before retesting. Veterans' Preference points are added to a passing score only - they cannot convert a failing result.

Many candidates start their prep by searching for a postal exam 955 study guide PDF. A free PDF can give you a basic outline of the topics covered, but it cannot simulate the timed, high-pressure format of the actual test. To build real readiness, pair any study guide with timed practice tests that mirror the Multicraft and Spatial Relations sections.

Video - 955 Exam Explained: Study Guide & Practice Test Tips

The test is divided into two major components:

60 Questions | 60 Minutes

Topics Covered:

• Electrical circuits, power distribution, and maintenance procedures

• Motors, control circuits, and schematics

• Digital electronics, computing systems, and test instruments

• Hydraulics and pneumatics

• Pumps, piping, and combustion systems

• Power transmission, lubrication, and mechanical maintenance

• Welding and rigging techniques

65-68 Questions | 40-60 Minutes

Skills Assessed:

• Identifying and manipulating geometric patterns

• Assembling shapes to form larger structures

• Recognizing 3D objects from multiple viewpoints

• Matching unfolded 3D shapes with their completed forms

Since the second section is time-sensitive, practicing similar problems beforehand can help candidates improve speed and accuracy.

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The Electrical section covers three core areas: AC/DC theory, parallel circuits, and test instruments. While these topics may seem familiar, the 955 exam goes deeper than basic knowledge - expect formula application under time pressure, multi-step circuit calculations, and instrument questions that go well beyond simply knowing what a voltmeter does.

The Mechanical Systems section covers hydraulics, pneumatics, and piping - three areas that trip up even experienced candidates. The 955 exam tests both practical knowledge and underlying theory, meaning familiarity with the tools alone is not enough. Expect questions on system components, pressure principles, and material specifications that require solid preparation to get right under timed conditions.

The Motors & Controls section covers motor theory and PLC ladder logic - two areas that consistently challenge candidates across all maintenance roles. Motors require both theoretical understanding and practical knowledge of how they behave in real systems, while PLC questions demand the ability to read and interpret control diagrams under time pressure. Neither rewards guesswork. For Electronic Technician candidates in particular, the Motors & Controls section is critical - it covers the schematics, digital electronics, and control systems that make up the core of the USPS Electronic Technician exam.

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The Spatial Relations section covers three question types: 3D objects, matching parts and figures, and matching shapes. While these may look like visual puzzles, the 955 exam demands more than pattern recognition - expect figures presented at unfamiliar angles, multi-piece assembly questions where small differences are easy to miss, and 3D visualization tasks that require fast, accurate mental rotation under time pressure.

• Once you complete the exam, your results will be reviewed by USPS management.
• Candidates who pass will receive a list of maintenance positions they qualify for based on their scores.
• Those who do not meet the passing criteria will receive an "Ineligible" status and must wait six months before reapplying.
• Qualified candidates will be invited for an interview.

Candidates who pass the 955 Exam will undergo an interview process with a panel consisting of USPS HR personnel and maintenance management. The interview is structured and typically includes 4-6 behavioral questions.

• Follow the STAR Method – Structure responses using Situation, Task, Action, and Result.

• Emphasize Safety Awareness – Every response should include references to safety measures and procedures.

• Demonstrate Problem-Solving Skills – Explain past technical challenges you have resolved.

• Communicate Clearly – Break down your answers so that even non-technical interviewers can understand them.

• Describe a situation where you had to troubleshoot a mechanical or electrical issue.

• Explain how you ensure safety while working with equipment.

• Discuss a time when you had to learn something new to complete a job task.

• Your interview performance will be evaluated alongside your exam score to determine eligibility.

• If selected, you will be required to complete fingerprinting and a background check.

• The overall hiring process may take two months or longer from the initial application to the official start date.

A USPS Maintenance employee keeps postal facilities and equipment running - from building systems and hand tools to mail processing machinery. Entry-level positions such as Maintenance Mechanic handle preventive and corrective maintenance, plumbing, HVAC, and basic electrical and mechanical repairs, while higher-graded roles such as Building Equipment Mechanic, Area Maintenance Technician, and Electronic Technician take on more specialized diagnostic and repair work. Both the Multicraft and Spatial Relations sections of Exam 955 are designed to test the kind of hands-on, technical reasoning this role requires.

Training - New Maintenance employees complete prescribed training courses before their first assignment, along with hands-on instruction from experienced maintenance staff. Career employees can also access free training for other maintenance positions throughout their career, making it possible to qualify for higher-graded roles over time.

Location - Maintenance employees are assigned to postal facilities nationwide, including post offices, processing and distribution centers, and USPS vehicle maintenance facilities. As with other USPS crafts, you do not choose your facility - placement depends on where positions are open at the time of hiring.

Hours - Maintenance operations often run around the clock to keep mail processing on schedule, so shifts can include nights, weekends, and holidays. Applicants should expect to be available across a range of shifts, particularly early in their career.

Salary - Entry-level Maintenance Mechanics typically start around Grade PS-05, roughly $61,500-$66,000 annually ($29.50-$31.75 per hour). Employees who qualify for higher-graded roles such as Building Equipment Mechanic, Area Maintenance Technician, or Electronic Technician (Grades PS-09 to PS-10) can earn $74,000-$89,000 or more annually, with step increases roughly every 36 to 52 weeks.

Benefits - Career Maintenance employees receive one of the most comprehensive federal benefits packages available:

• Health insurance through the Federal Employees Health Benefits (FEHB) Program - most of the premium paid by USPS
• Dental and vision through the Federal Employees Dental and Vision Insurance Program (FEDVIP)
• Defined benefit pension through the federal retirement program
• Thrift Savings Plan (TSP) with up to 5% employer matching
• Basic life insurance fully paid by USPS through the Federal Employees' Group Life Insurance (FEGLI) Program
• Social Security and Medicare coverage