Postal Exam 955 - Free Practice Test & Study Guide (2026)
Every USPS hire for maintenance craft positions must pass Postal Exam 955 before advancing in the hiring process. The exam is used across all maintenance roles and covers 8 content areas divided into two timed sections: a knowledge-based section testing mechanical principles, electrical theory, and workshop maintenance, and a separate spatial visualization section. A score below the passing threshold results in an "Ineligible" designation, which bars the candidate from reapplying for 6 months.
JobTestPrep's USPS Exam 955 prep course covers every content area tested on both sections of the exam. The course includes 21 topic-specific practice tests across Mechanics, Electronics, and Workshop & General Maintenance, 3 Spatial Relations tests, 7 study guides, and 2 full timed simulations. Practice material is calibrated above the difficulty level of the real exam.
USPS Exam 955
1-Month Access
Complete USPS 955 Practice - Tests, Simulations & Study Guides
- Mechanics: 3 tests
- Electronics: 9 tests
- Workshop & General Maintenance: 6 tests
- Spatial Relations: 3 tests (Matching Parts & Figures, Matching Shapes, 3D Objects)
- 7 In-Depth Study Guides: Mechanical & Electrical, Electrical General, Rigging, Welding, Hydraulics, Pneumatics, Power Transmission
- Time Simulated Multicraft Simulation - 60 questions
- Time Simulated Full-Length Exam Simulation - 125 questions
- Complete answers explanations for each question
What Is the Postal Exam 955?
Postal Exam 955 is administered through the USPS Maintenance Selection System and consists of two timed parts:
- Multicraft Test - 60 minutes covering mechanical and electrical job knowledge across eight content areas
- 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.
Leave Nothing to Chance , Preparation is Everything
The USPS 955 covers a wide range of technical topics - and these questions are just a sample. Reaching the 70 passing score requires solid preparation across every content area. Our USPS Exam 955 PrepPack gives you 21 practice tests, 7 study guides, and two full timed simulations to get you there.
Mechanical Knowledge and Electronics - Sample Questions
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Electrical Practice Test
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.
In a 110V electrical system, there are three appliances: appliance A (550W) appliance B (770W), and appliance C (330W). Given that all appliances operate simultaneously, what is the minimum required fuse rating?
Click the correct answer:
Tip:
When calculating fuse ratings, remember that the total current of devices in parallel is the sum of each device's current. Ensure your fuse rating is slightly above this total to handle typical operating conditions safely.
The total resistance of the circuit is:
Base your answer to the following question on the figure below:
Tip:
In electrical circuits, the voltmeter is always connected in ____________ and the ammeter is always connected in ____________.
Click the correct answer:
The correct answer is D.
In electrical circuits, voltmeters are always used in parallel to the nodes where the potential is required to be determined. However, ammeters are always connected in series to measure the desired current in the branches. These connections are shown in the figure below.
Tip:
Remember, place the voltmeter in parallel to measure voltage and the ammeter in series to measure current. Using them in the wrong positions can cause inaccurate readings or damage to the meter.
Mechanical Systems Practice Test
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.
Which type of valve should be used when a precise, low flow is required?
Click the correct answer:
Tip:
In hydraulic systems, remember that each valve type serves a unique function. Choose a needle valve when fine-tuning flow is essential, especially in systems sensitive to pressure changes.
Which type of pipe would be most recommended to install deep beneath the ground?
Click the correct answer:
Tip:
For underground piping, durability is key—pipes with higher schedule numbers offer the strength needed to endure the weight and pressure from surrounding soil.
What is the aim of flexible couplings?
Click the correct answer:
Tip:
When connecting shafts, consider flexible couplings to help accommodate slight misalignments, which can reduce wear and tear on machinery over time.
USPS Candidates Recommend Practicing with JobTestPrep
Motors and Controls Practice Test
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 test.
In induction motors, the difference between the synchronous and asynchronous speed of the rotor is referred to as:
Click the correct answer:
Tip:
Understanding the difference between synchronous and asynchronous speed is key. Remember, "slip" is the gap between these two speeds, which allows induction motors to function effectively.
What is the equivalent Boolean expression for the PLC program below?
Click the correct answer:
The correct answer is A.
Below are the steps of analysis:
Tip:
Pay attention to how the ladder logic groups elements—this can guide you in identifying the correct Boolean expression quickly.
Spatial Relations and Visualization - Sample Questions
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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.
Select from the drawings of objects labelled A, B, C and D the one that would have the given TOP, FRONT, and RIGHT views.
TOP
FRONT
RIGHT
Click the correct answer:
You are shown a shape made up of two or three separate pieces - identify which of the answer options below is one of those pieces. Pay close attention to angles and orientation, as pieces may appear rotated from how they sit in the original shape.
You are shown six labeled shapes (A-F) and must identify which answer option can be formed by combining two or more of them.You are shown six labeled shapes (A-F) and must identify which answer option can be formed by combining two or more of them. Look carefully at how edges and angles align when pieces are joined - rotating or flipping shapes mentally is key to finding the correct match.
What’s Inside Our USPS 955 Exam Prep Pack
Using our USPS Exam 955 PrepPack, you get:
- 21 topic-specific practice tests across all Multicraft content areas - 3 Mechanics tests covering power transmission, hydraulics, pneumatics, and piping; 9 Electronics tests covering AC/DC theory, parallel circuits, motors, PLCs, control circuits, test instruments, and digital electronics; and 6 Workshop & General Maintenance tests covering welding, rigging, tools, and safety procedures - so every topic area is covered before test day.
- 3 Spatial Relations practice tests targeting both question types on the exam - Matching Parts & Figures, Matching Shapes, and 3D Object visualization - the section candidates consistently find most time-pressured and hardest to improve without dedicated practice.
- 2 timed full simulations replicating actual exam conditions - a Multicraft Simulation (60 questions, 60 minutes) and a Full-Length Exam Simulation (125 questions) covering both parts of the exam under the same time constraints you will face on test day.
- 7 in-depth study guides covering every technical domain - dedicated guides for Mechanical & Electrical, Electrical General, Hydraulics, Pneumatics, Power Transmission, Welding, and Rigging - building the theoretical foundation the 955 exam tests beyond what practice questions alone can provide.
- Complete answer explanations for every question - not just correct/incorrect, but the reasoning and formulas behind each answer, so you understand why the right answer is right and can apply the same logic to questions you haven't seen before.
- A proven prep system built on 30+ years of experience - developed by assessment specialists who have analyzed the Ramsay Multicraft format and USPS's specific implementation of Exam 955, and refined based on feedback from thousands of candidates who have gone through the actual hiring process.
USPS 955 Exam Breakdown
The test is divided into two major components:
1: Mechanical Knowledge & Electronics
60 Questions | 60 Minutes
Topics Covered:
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Electrical circuits, power distribution, and maintenance procedures
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Motors, control circuits, and schematics
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Digital electronics, computing systems, and test instruments
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Hydraulics and pneumatics
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Pumps, piping, and combustion systems
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Power transmission, lubrication, and mechanical maintenance
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Welding and rigging techniques
2: Spatial Relations & Visualization
65-68 Questions | 40-60 Minutes
Skills Assessed:
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Identifying and manipulating geometric patterns
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Assembling shapes to form larger structures
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Recognizing 3D objects from multiple viewpoints
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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.
What Happens After the USPS 955 Exam?
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Once you complete the exam, your results will be reviewed by USPS management.
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Candidates who pass will receive a list of maintenance positions they qualify for based on their scores.
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Those who do not meet the passing criteria will receive an “Ineligible” status and must wait six months before reapplying.
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Qualified candidates will be invited for an interview.
The USPS Maintenance Job 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.
Interview Tips
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Follow the STAR Method – Structure responses using Situation, Task, Action, and Result.
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Emphasize Safety Awareness – Every response should include references to safety measures and procedures.
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Demonstrate Problem-Solving Skills – Explain past technical challenges you have resolved.
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Communicate Clearly – Break down your answers so that even non-technical interviewers can understand them.
Common Interview Questions
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Describe a situation where you had to troubleshoot a mechanical or electrical issue.
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Explain how you ensure safety while working with equipment.
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Discuss a time when you had to learn something new to complete a job task.
What Happens After the Interview?
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Your interview performance will be evaluated alongside your exam score to determine eligibility.
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If selected, you will be required to complete fingerprinting and a background check.
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The overall hiring process may take two months or longer from the initial application to the official start date.
USPS 955 Exam FAQs
Apply through the USPS careers website and look for maintenance positions listing Exam 955 under "Examination Requirements." After applying, watch your email - including spam and junk folders - for an invitation from the testing vendor. Add @usps.gov, @psionline.com, and @geninfo.com to your contacts to avoid missing it. Once invited, log into your assessment account to schedule your appointment at a testing center. You can reschedule up to 24 hours before your appointment. On test day, arrive 15 minutes early with a government-issued photo ID and your assessment login credentials - personal items including phones are not permitted in the testing room.
The USPS Maintenance Selection System (MSS) is the structured process USPS uses to fill maintenance craft positions. Exam 955 is the examination component of that system - candidates must pass it before being considered for any maintenance role. Passing the exam is not the final step: qualified candidates proceed to a structured panel interview conducted by USPS HR and maintenance management, and final placement is determined by combining both results. Your Exam 955 score is stored in your eCareer Candidate Profile and automatically applied to future applications for positions requiring the same exam.
The USPS 955 is a hard exam, as it requires solid theoretical and practical knowledge. The exam covers a wide range of mechanical and electrical topics. Candidates with no experience in these fields will find the test harder. That being said, prior prep can help increase your chances of scoring high.
The USPS 933, along with the 931 and the 932 versions, were previously used to screen candidates applying for maintenance positions. These exams were replaced by the 955, which became the official USPS exam for maintenance applicants.
According to an APWU report from September 2025, USPS has discussed phasing out Exam 955 and replacing it with a family of role-specific Skilled Maintenance Assessment exams (961-965). No official USPS retirement date has been announced, and Exam 955 remains active. Candidates currently invited to take Exam 955 should prepare for it as normal.
No - the automotive technician exam (series 943-945) covers vehicle maintenance and is a separate assessment. Exam 955 is the maintenance exam for facilities and equipment roles.
Free PDFs can give you a basic overview of the topics, but they cannot prepare you for how the exam actually feels. Exam 955 is timed, broad, and technically demanding - the Spatial Relations section in particular requires speed and pattern recognition that can only be built through repeated practice under real time pressure. A static document shows you what the topics are; it cannot simulate 60 Multicraft questions in 60 minutes or train your pacing for 65-68 Spatial items. Candidates who rely on PDFs alone typically know the concepts but struggle with execution on test day. Our PrepPack replicates real exam conditions with timed simulations, topic-specific practice tests across every content area, and detailed explanations that build the reasoning skills the exam actually tests.
To get hired, you must pass a 5-panel urine drug test. The USPS is strict about this issue and will turn down many qualified applicants because of the drug test, making it their biggest hurdle in finding employees.
After completing your payment, you will receive two emails: a payment receipt and a login link with your account details. Once you log in and reset your password, you will have instant, unlimited access to your PrepPack.
You can start practicing immediately with tailored questions and detailed explanations, tracking your performance along the way. Your progress is saved, allowing you to revisit previous attempts as many times as you like. If you need more time, you can extend your subscription by contacting c.serv@jobtestprep.com.
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