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100+ Free Postal Exam 955 Practice Questions

Pass your USPS Postal Exam 955 — Maintenance Selection System (Technical Maintenance) exam on the first try — instant access, no signup required.

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The frequency of standard US grid AC is:

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Key Facts: Postal Exam 955 Exam

70

Minimum Passing Score

USPS

2 parts

Take-at-home + Proctored

USPS / PSI

~2 hr 15 min

Combined Seat Time

USPS

180

Total Items (120 + 60)

USPS

5 crafts

ET, BEM, MPE, MM, AMT

USPS Maintenance

No fee

Exam Cost

USPS

Postal Exam 955 is a free, two-part USPS Maintenance Selection System for technical-maintenance crafts. Part 1 is a ~120-question, ~75-minute personal-experience inventory taken at home. Part 2 is a proctored 60-question multicraft test plus spatial reasoning at a PSI center. Combined seat time is about 2 hours 15 minutes. Passing score is 70, but selection is rank-based — aim for 85+.

Sample Postal Exam 955 Practice Questions

Try these sample questions to test your Postal Exam 955 exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1Which truth-table output describes a 2-input AND gate?
A.Output is 1 only when both inputs are 0
B.Output is 1 only when both inputs are 1
C.Output is 1 when at least one input is 1
D.Output is 0 when both inputs are equal
Explanation: An AND gate outputs 1 only when ALL inputs are 1. With both inputs at 1, output = 1; in every other combination (0,0), (0,1), (1,0), the output is 0.
2A NAND gate's output is the equivalent of which combination?
A.An OR followed by an inverter
B.An AND followed by an inverter
C.Two inverters in parallel
D.An XOR followed by an AND
Explanation: NAND literally means 'NOT AND' — the gate performs the AND operation, then inverts the result. So output = 0 only when all inputs are 1.
3On a schematic, the symbol of a triangle pointing into a vertical line with a perpendicular bar represents which device?
A.Resistor
B.Diode
C.Capacitor
D.Inductor
Explanation: A diode is drawn as a triangle (anode) pointing toward a vertical line (cathode). Current flows in the direction of the triangle (anode to cathode) when forward-biased.
4A diode is forward-biased when:
A.The anode is more negative than the cathode
B.The cathode is more positive than the anode
C.The anode is more positive than the cathode by at least the forward-voltage drop
D.Both anode and cathode are at the same potential
Explanation: A silicon diode conducts when the anode is more positive than the cathode by roughly 0.6–0.7 V (the forward-voltage drop). Below that, the diode remains off.
5An NPN transistor is in saturation when:
A.Base-emitter junction is reverse-biased
B.Both junctions are reverse-biased
C.Both base-emitter and base-collector junctions are forward-biased
D.Collector-emitter voltage equals the supply
Explanation: An NPN transistor is in saturation when BOTH junctions are forward-biased — the device acts like a closed switch with a small V_CE (≈ 0.2 V).
6Which gate outputs 1 when the inputs are different and 0 when they are the same?
A.AND
B.OR
C.XOR
D.NOR
Explanation: XOR (exclusive-OR) outputs 1 when inputs differ and 0 when they match. It's the workhorse for binary addition (sum bit) and parity checking.
7An ideal op-amp has which of these characteristics?
A.Zero input impedance and infinite output impedance
B.Infinite open-loop gain, infinite input impedance, zero output impedance
C.Unity gain and 50-ohm input impedance
D.Negative input impedance
Explanation: An ideal op-amp has infinite open-loop gain, infinite input impedance (no input current), and zero output impedance. Real op-amps approach these as design targets.
8A schematic shows a component with a coiled symbol crossed by an arrow. What is it?
A.Fixed resistor
B.Variable inductor
C.Capacitor
D.Photodiode
Explanation: A coil with an arrow through it is a variable inductor — the arrow indicates the value can be adjusted (e.g., a tuning coil).
9Which logic gate is functionally complete by itself (any logic circuit can be built from it alone)?
A.AND
B.OR
C.NAND
D.XOR
Explanation: NAND (and NOR) are universal gates — any Boolean function can be built using only NAND gates. AND, OR, and XOR are not functionally complete by themselves.
10A zener diode is normally operated in:
A.Forward bias above 0.7 V
B.Reverse breakdown region
C.Saturation region
D.Open-circuit mode
Explanation: A zener diode is designed to operate in its reverse breakdown region, where its voltage remains nearly constant at the zener voltage — useful for voltage regulation.

About the Postal Exam 955 Exam

The USPS Postal Exam 955 is the Maintenance Selection System used to hire Electronic Technician, Building Equipment Mechanic (BEM), Mail Processing Equipment (MPE) Mechanic, Maintenance Mechanic, and Area Maintenance Technician. It is delivered in two parts: a take-at-home Personal Characteristics & Experience Inventory (~120 questions, ~75 minutes), and a proctored multicraft test (60 questions, ~60 minutes) plus a spatial-reasoning section administered at a PSI testing center.

Questions

180 scored questions

Time Limit

~75 min at-home + ~60 min proctored = ~2 hr 15 min combined

Passing Score

70+

Exam Fee

No fee (United States Postal Service (USPS) / PSI Services)

Postal Exam 955 Exam Content Outline

18%

Electronics

Digital logic gates, analog devices, schematic reading for USPS automation

14%

Electrical

Ohm's Law, series vs parallel, AC vs DC, three-phase power

14%

Mechanical

Gears, belts, bearings, mechanical advantage, hydraulics, pneumatics

12%

HVAC & Refrigeration

Refrigerant cycles, compressors, evaporators, condensers, HVAC controls

12%

Computers & Networking

IP basics, RJ45 vs fiber, RAM/CPU, USB/serial, PC/PLC troubleshooting

12%

Spatial Reasoning

Object rotation, paper folding, mental assembly visualization

10%

Math Reasoning

Algebra, geometry, and unit conversions in maintenance contexts

8%

Safety

LOTO, NFPA 70E arc flash, PPE, SDS/MSDS, OSHA general industry

How to Pass the Postal Exam 955 Exam

What You Need to Know

  • Passing score: 70+
  • Exam length: 180 questions
  • Time limit: ~75 min at-home + ~60 min proctored = ~2 hr 15 min combined
  • Exam fee: No fee

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

Postal Exam 955 Study Tips from Top Performers

1Master Ohm's Law in three forms (V=IR, I=V/R, R=V/I) — multiple multicraft items use it as the underlying step.
2Drill logic-gate truth tables (AND, OR, NAND, NOR, XOR) until you can write them from memory in under a minute.
3Practice spatial rotation and paper-folding 15 minutes a day — PSI's spatial block rewards repetition, not raw IQ.
4Know the six-step LOTO sequence and NFPA 70E arc-flash boundary categories — safety items repeat across versions.
5Take Part 1 in one sitting, in a quiet room, and pick strong-but-credible answers (rarely > never, almost-always > always).

Frequently Asked Questions

What is the passing score on USPS Postal Exam 955?

USPS sets a minimum passing score of 70 on the 955, but selection is rank-based — higher-scoring candidates are contacted first. Competitive scores are typically 85 or higher. Scores stay on the eligibility register for about two years.

How is the USPS 955 structured?

The 955 has two parts. Part 1 is a Personal Characteristics & Experience Inventory of about 120 items, ~75 minutes, taken at home through USPS's online assessment platform. Part 2 is a proctored multicraft test of 60 items plus a spatial-reasoning section, taken at a PSI testing center in roughly 60 minutes. Combined seat time is about 2 hours 15 minutes.

Which USPS jobs use the 955 exam?

USPS uses the 955 to hire Electronic Technician, Building Equipment Mechanic (BEM), Mail Processing Equipment (MPE) Mechanic, Maintenance Mechanic, and Area Maintenance Technician. All five crafts take the same 955 multicraft battery but apply for different vacancy announcements.

Is the USPS 955 exam free?

Yes. USPS does not charge an application fee or exam fee for the 955. PSI testing-center fees for Part 2 are covered by USPS — candidates pay nothing out of pocket.

What topics are on the 60-question multicraft test?

The multicraft block covers electronics (digital logic, analog, schematics), electrical fundamentals (Ohm's Law, series/parallel, AC/DC, three-phase), mechanical systems (gears, belts, bearings, hydraulics, pneumatics), HVAC and refrigeration, computers and IP networking, math reasoning, and workplace safety (LOTO, NFPA 70E, PPE, SDS, OSHA).

Can the 955 be taken remotely?

Only Part 1 (the Personal Characteristics & Experience Inventory) is taken remotely on your own device. Part 2 — the multicraft and spatial-reasoning sections — must be taken in person at a PSI testing center under proctored conditions.

Can I retake the USPS 955?

Yes, but you typically must wait 6–12 months between attempts for the same craft. You must also reapply for an open vacancy announcement and be re-invited to test.