Home  /  Exams  /  Air Force  /  3E051 Electrical Systems Journeyman

Free 24-Hour Trial · No Credit Card

3E051 Practice Exam Electrical Systems Journeyman

1,715 source-linked questions across 32 EWorld objectives. Built for Electrical Systems Airmen testing for E-5: power distribution, airfield lighting, fault locating, manhole entry safety, NFPA fire alarm standards, motor controllers, and the technical orders that drive the SKT.

Start Free Trial → No credit card · Full access · 24 hours
69

Previous users

Very satisfied with PowerKram

95%

Satisfied users

Would recommend PowerKram to friends

91%

Passed Exam

Using PowerKram and content designed by experts

97%

Highly Satisfied

With question quality and exam engine features

1,715
Practice Questions
32
EWorld Objectives
24hr
Free Trial
2026
Cycle Aligned

Limited Promotion

Buy this exam, get a civilian cert exam free

Pair this 3E051 SKT with any civilian IT certification practice exam and the civilian exam discounts to $0 at checkout. Electrical Systems experience translates directly to civilian electrician journeyman/master licensing, electrical contracting, and industrial electrical maintenance roles — see the AFSC matcher on the Air Force exams page for the certs that match your career path.

What's Included

PowerKram Plus 3E051 Electrical Systems Practice Exam

Everything below is included with your free 24-hour trial — no credit card, no software install, no hidden upsell.

24-Hour Full Access Trial

Complete access to the 3E051 Electrical Systems Journeyman practice exam with no credit card required.

Exam Mode

Simulates the day-of-the-exam experience — full timing, full pressure, real WAPS feel.

Learn Mode

Immediate feedback, source citations on every question, reinforced learning between attempts.

EWorld-Aligned Content

Every question maps to CDC volumes, NFPA standards, AFOSH safety guidance, and the technical orders used by the actual SKT. No recycled dumps. No guesswork.

No Download Required

Browser-based. Study from any device — base, deployment, or home.

Free Engine, Free Updates

PowerKram exam engine included free with every practice exam. New content pushed live during your access period.

About This Exam

3E051 Electrical Systems Journeyman Overview

Who It's For

The 3E051 Electrical Systems Journeyman SKT is for Senior Airmen in Electrical Systems testing for promotion to Staff Sergeant. The official test demands command of power distribution, airfield lighting, fault locating, manhole and confined-space entry, fire alarm system maintenance, motor controllers, grounding, NFPA standards, and the technical orders that govern facility electrical work.

Each question is mapped to a specific EWorld objective so you can drill into the procedures and decision points that move your line number — not waste study hours on systems you handle daily in the field.

How It's Different

Electrical Systems is technical and broad — you'll see questions on overhead distribution, underground cables, airfield lighting, interior wiring, fire alarm systems, and motor controllers all on one SKT. PowerKram's chapter-level study lets you target the systems you don't touch in your day job: if your section runs interior, you'll still see questions on airfield lighting and underground fault locating.

With your 24-hour free trial, you get full access to the question library and the analytics that show you exactly which CDC sections need another pass — without entering a credit card.

Why Source-Linked Matters

Every question links to its exact CDC volume, NFPA standard, or technical order. When you miss a question on manhole air sampling or motor controller troubleshooting, you don't just see "wrong" — you see the source so you can read the underlying procedure and understand why.

This is the defining difference between PowerKram and dump-based study sites: every answer is auditable and tied to the doctrine you're tested on.

How Chapter-Level Study Works

Study Smart, Not Long

Every question is tagged to a specific EWorld objective, so you can pinpoint weak areas and focus your study time where it actually moves your line number.

01

Diagnose

Take a full-length exam in Exam Mode. The engine scores your performance by objective, exposing exactly which CDC sections and technical areas you've mastered and which need work.

02

Drill

Switch to Learn Mode and filter questions to your weak objectives only. Get immediate feedback and source links so you read the underlying CDC or NFPA material that explains each answer.

03

Re-Test

Retake full-length exams to confirm mastery. Track your objective-level scores over time so you walk into the testing center knowing exactly where you stand.

Try Before You Sign Up

Sample Questions

Ten questions drawn from the 3E051 Electrical Systems Journeyman practice exam. Tap any question to reveal the answer choices and source-linked explanation.

Q01 Overhead Lines · Storm Inspection

A journeyman is assigned to inspect overhead power lines after a storm.

What safety precaution must be taken first?

  • ATest voltage with a multimeter
  • BNotify base operations
  • CInspect poles for pest damage and loose hardware
  • DGround the lines
Explanation Inspecting poles for damage ensures structural safety before electrical testing begins.
Q02 Lighting Circuits · Diagnostics

A technician is troubleshooting a lighting circuit that intermittently fails.

What tool is most appropriate for diagnosing the issue?

  • AInfrared camera
  • BVoltage regulator
  • CMultimeter
  • DGrounding rod
Explanation A multimeter helps identify voltage drops and continuity issues in lighting circuits.
Q03 Airfield Lighting · Visibility

A journeyman is tasked with installing a new airfield lighting system.

What component ensures visibility during low-visibility conditions?

  • AVisual glide slope indicators
  • BCapacitor banks
  • CIntrusion detection alarms
  • DCathodic protection
Explanation Glide slope indicators guide aircraft during approach in poor visibility.
Q04 Confined Space · Manhole Entry

A technician is preparing to work in a manhole.

What safety check must be performed before entry?

  • ACheck for rodents
  • BTest air samples for gases and oxygen levels
  • CVerify cable insulation
  • DInspect ladder stability
Explanation Testing air samples prevents exposure to toxic gases and ensures safe oxygen levels.
Q05 LOTO · Breaker Replacement

A journeyman is replacing a faulty breaker in a distribution panel.

What must be done before removal?

  • ANotify the commander
  • BDisconnect the load and lock out the circuit
  • CGround the panel
  • DReplace without delay
Explanation Locking out the circuit ensures safety and prevents accidental energizing during maintenance.
Q06 Underground Cables · Fault Location

A technician is assigned to repair underground cables.

What tool assists in locating faults?

  • AVoltage regulator
  • BCable fault locator
  • CCathodic tester
  • DLine maintenance truck
Explanation Cable fault locators identify breaks or shorts in underground systems.
Q07 Standards · NFPA

A journeyman is inspecting a fire alarm system.

What standard governs installation and maintenance?

  • ANFPA
  • BOSHA
  • CIEEE
  • DNEC
Explanation NFPA standards (specifically NFPA 72) regulate fire alarm system installation and maintenance to ensure safety and compliance.
Q08 Grounding · Fault Protection

A technician is asked to install a grounding system for a new facility.

What is the primary purpose of grounding?

  • AImprove lighting
  • BReduce voltage
  • CProtect equipment and personnel from electrical faults
  • DIncrease current flow
Explanation Grounding provides a low-resistance path for fault current to flow safely to earth, which trips protective devices, prevents equipment damage from voltage transients, and protects personnel from shock hazards. It does not improve lighting, reduce normal operating voltage, or increase current flow.
Q09 In-Service Work · Cost Estimates

A journeyman is preparing a cost estimate for an in-service job.

What factor must be included?

  • APersonal preferences
  • BEngineered performance standards
  • CWeather forecast
  • DUniform requirements
Explanation Engineered performance standards ensure accurate labor and material estimates.
Q10 Motor Controllers · Technical Orders

A technician is troubleshooting a motor controller malfunction.

What resource provides guidance?

  • AAFI 36-2903
  • BWiring diagrams and technical orders
  • CFitness tracker
  • DSafety incident log
Explanation Wiring diagrams and technical orders help diagnose and repair motor controller faults.

Ready to lock in your line number?

Free 24-hour trial · No credit card · 1,715 questions, 32 objectives, full exam engine

Start Free Trial →