OKLAHOMA JOURNEYMAN ELECTRICIAN EXAM – QUESTIONS AND ANSWERS | VERIFIED AND WELL
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
*CORE DOMAINS*
*• National Electrical Code (NEC) Application*
*• Electrical Theory and Circuits*
*• Wiring Methods and Materials*
*• Motors and Controls*
*• Grounding and Bonding*
*• Electrical Calculations*
*• Safety Practices and OSHA Compliance*
*• Services, Feeders, and Branch Circuits*
*• Transformers and Power Distribution*
*INTRODUCTION*
*The Oklahoma Journeyman Electrician Exam is designed to evaluate a can
SECTION ONE (QUESTIONS 1–50)
Question 1
What is the primary purpose of grounding in an electrical system?
A. Increase voltage stability
B. Provide a return path for normal current
C. Protect equipment from lightning only
D. Provide a safe path for fault current
,🟢 Correct Answer: D. Provide a safe path for fault current
🔴 Explanation: Grounding ensures fault current has a low-resistance path to earth, allowing protective
devices to operate quickly and safely.
Question 2
Which device protects against overcurrent conditions?
A. Transformer
B. Circuit breaker
C. Conductor
D. Switch
🟢 Correct Answer: B. Circuit breaker
🔴 Explanation: Circuit breakers automatically interrupt excessive current flow to prevent damage and fire
hazards.
Question 3
What does Ohm’s Law state?
A. Voltage equals current times resistance
B. Current equals voltage squared
C. Resistance equals power times voltage
D. Power equals voltage minus current
🟢 Correct Answer: A. Voltage equals current times resistance
,🔴 Explanation: Ohm’s Law defines V = I × R, fundamental for electrical calculations.
Question 4
Which color is typically used for equipment grounding conductors?
A. White
B. Green
C. Red
D. Black
🟢 Correct Answer: B. Green
🔴 Explanation: Green insulation or bare copper is reserved for grounding conductors per NEC standards.
Question 5
What is the function of a GFCI?
A. Increases voltage efficiency
B. Protects against overloads
C. Detects ground faults and shuts off power
D. Regulates current flow
🟢 Correct Answer: C. Detects ground faults and shuts off power
🔴 Explanation: GFCIs quickly disconnect power when leakage current is detected to prevent shock hazards.
, Question 6
The NEC is primarily used for:
A. Vehicle wiring standards
B. Electrical installation safety standards
C. Plumbing systems
D. HVAC maintenance
🟢 Correct Answer: B. Electrical installation safety standards
🔴 Explanation: The NEC provides standardized rules for safe electrical design and installation.
Question 7
What is the unit of electrical power?
A. Volt
B. Ampere
C. Watt
D. Ohm
🟢 Correct Answer: C. Watt
🔴 Explanation: Watts measure electrical power consumption or generation.
Question 8
A series circuit is characterized by:
DETAILED ANSWERS | PLUS RATIONALES | GUARANTEED PASS | LATEST EXAM UPDATE
*CORE DOMAINS*
*• National Electrical Code (NEC) Application*
*• Electrical Theory and Circuits*
*• Wiring Methods and Materials*
*• Motors and Controls*
*• Grounding and Bonding*
*• Electrical Calculations*
*• Safety Practices and OSHA Compliance*
*• Services, Feeders, and Branch Circuits*
*• Transformers and Power Distribution*
*INTRODUCTION*
*The Oklahoma Journeyman Electrician Exam is designed to evaluate a can
SECTION ONE (QUESTIONS 1–50)
Question 1
What is the primary purpose of grounding in an electrical system?
A. Increase voltage stability
B. Provide a return path for normal current
C. Protect equipment from lightning only
D. Provide a safe path for fault current
,🟢 Correct Answer: D. Provide a safe path for fault current
🔴 Explanation: Grounding ensures fault current has a low-resistance path to earth, allowing protective
devices to operate quickly and safely.
Question 2
Which device protects against overcurrent conditions?
A. Transformer
B. Circuit breaker
C. Conductor
D. Switch
🟢 Correct Answer: B. Circuit breaker
🔴 Explanation: Circuit breakers automatically interrupt excessive current flow to prevent damage and fire
hazards.
Question 3
What does Ohm’s Law state?
A. Voltage equals current times resistance
B. Current equals voltage squared
C. Resistance equals power times voltage
D. Power equals voltage minus current
🟢 Correct Answer: A. Voltage equals current times resistance
,🔴 Explanation: Ohm’s Law defines V = I × R, fundamental for electrical calculations.
Question 4
Which color is typically used for equipment grounding conductors?
A. White
B. Green
C. Red
D. Black
🟢 Correct Answer: B. Green
🔴 Explanation: Green insulation or bare copper is reserved for grounding conductors per NEC standards.
Question 5
What is the function of a GFCI?
A. Increases voltage efficiency
B. Protects against overloads
C. Detects ground faults and shuts off power
D. Regulates current flow
🟢 Correct Answer: C. Detects ground faults and shuts off power
🔴 Explanation: GFCIs quickly disconnect power when leakage current is detected to prevent shock hazards.
, Question 6
The NEC is primarily used for:
A. Vehicle wiring standards
B. Electrical installation safety standards
C. Plumbing systems
D. HVAC maintenance
🟢 Correct Answer: B. Electrical installation safety standards
🔴 Explanation: The NEC provides standardized rules for safe electrical design and installation.
Question 7
What is the unit of electrical power?
A. Volt
B. Ampere
C. Watt
D. Ohm
🟢 Correct Answer: C. Watt
🔴 Explanation: Watts measure electrical power consumption or generation.
Question 8
A series circuit is characterized by:
