Air Force 3E051 Electrical Systems Practice Exam
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Air Force 3E051 – Electrical Systems Journeyman
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Start NowAbout the Air Force 3E051 Electrical Systems
The Air Force 3E051 Electrical Systems practice exam is designed for professionals who install, maintain, and troubleshoot electrical distribution systems and components across Air Force facilities. As technology evolves and industry demands grow more complex; this credential validates your ability to apply real-world skills and knowledge using Air Force tools and frameworks. Passing this exam positions you as a trusted expert, capable of solving high-impact challenges and contributing to secure, scalable, and efficient systems.
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Test Your Knowledge of Air Force 3E051 Electrical Systems
Question #1
A journeyman is assigned to inspect overhead power lines after a storm.
What safety precaution must be taken first?
A) Test voltage with a multimeter
B) Notify base operations
C) Inspect poles for pest damage and loose hardware
D) Ground the lines
Solution
Correct answers: C – Explanation:
Inspecting poles for damage ensures structural safety before electrical testing begins.
Question #2
A technician is troubleshooting a lighting circuit that intermittently fails.
What tool is most appropriate for diagnosing the issue?
A) Infrared camera
B) Voltage regulator
C) Multimeter
D) Grounding rod
Solution
Correct answers: C – Explanation:
A multimeter helps identify voltage drops and continuity issues in lighting circuits.
Question #3
A journeyman is tasked with installing a new airfield lighting system.
What component ensures visibility during low-visibility conditions?
A) Visual glide slope indicators
B) Capacitor banks
C) Intrusion detection alarms
D) Cathodic protection
Solution
Correct answers: A – Explanation:
Glide slope indicators guide aircraft during approach in poor visibility.
Question #4
A technician is preparing to work in a manhole.
What safety check must be performed before entry?
A) Check for rodents
B) Test air samples for gases and oxygen levels
C) Verify cable insulation
D) Inspect ladder stability
Solution
Correct answers: B – Explanation:
Testing air samples prevents exposure to toxic gases and ensures safe oxygen levels.
Question #5
A journeyman is replacing a faulty breaker in a distribution panel.
What must be done before removal?
A) Notify the commander
B) Disconnect the load and lock out the circuit
C) Ground the panel
D) Replace without delay
Solution
Correct answers: B – Explanation:
Locking out the circuit ensures safety and prevents accidental energizing during maintenance.
Question #6
A technician is assigned to repair underground cables.
What tool assists in locating faults?
A) Voltage regulator
B) Cable fault locator
C) Cathodic tester
D) Line maintenance truck
Solution
Correct answers: B – Explanation:
Cable fault locators identify breaks or shorts in underground systems.
Question #7
A journeyman is inspecting a fire alarm system.
What standard governs installation and maintenance?
A) NFPA
B) OSHA
C) IEEE
D) Ground the lines
Solution
Correct answers: A – Explanation:
NFPA standards regulate fire alarm systems to ensure safety and compliance.
Question #8
A technician is asked to install a grounding system for a new facility.
What is the primary purpose of grounding?
A) Improve lighting
B) Reduce voltage
C) Protect equipment and personnel from electrical faults
D) Increase current flow
Solution
Correct answers: C – Explanation:
Inspecting poles for damage ensures structural safety before electrical testing begins.
Question #9
A journeyman is preparing a cost estimate for an in-service job.
What factor must be included?
A) Personal preferences
B) Engineered performance standards
C) Weather forecast
D) Uniform requirements
Solution
Correct answers: B – Explanation:
Engineered performance standards ensure accurate labor and material estimates.
Question #10
A technician is troubleshooting a motor controller malfunction.
What resource provides guidance?
A) AFI 36-2903
B) Wiring diagrams and technical orders
C) Fitness tracker
D) Safety incident log
Solution
Correct answers: B – Explanation:
Wiring diagrams and technical orders help diagnose and repair motor controller faults.
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