COLORADO JOURNEYMAN ELECTRICIAN LICENSING
EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) Q&A 2026 | INSTANT
DOWNLOAD PDF
1. Which electrical code is the primary standard used for most
electrical installations in Colorado?
A. International Building Code (IBC)
B. International Residential Code (IRC)
C. National Electrical Code (NEC)
D. National Fire Protection Standard 72 (NFPA 72)
*Correct Answer: C. National Electrical Code (NEC)
Rationale: The NEC (NFPA 70) establishes the minimum
requirements for safe electrical installations and is the primary
code adopted throughout Colorado, subject to local
amendments.
2. What is the primary purpose of grounding an electrical
system?
A. Increase voltage
B. Improve efficiency
C. Provide a safe path for fault current
D. Reduce conductor resistance
,*Correct Answer: C. Provide a safe path for fault current
Rationale: Grounding protects people and equipment by
providing a low-impedance path for fault current, allowing
overcurrent devices to operate quickly.
3. Which conductor is intentionally connected to earth at the
service equipment?
A. Equipment grounding conductor
B. Grounded (neutral) conductor
C. Hot conductor
D. Traveler conductor
*Correct Answer: B. Grounded (neutral) conductor
Rationale: The grounded conductor is bonded to earth at the
service disconnect to establish system voltage and facilitate
fault clearing.
4. What device protects a circuit primarily from overloads and
short circuits?
A. Disconnect switch
B. Relay
C. Circuit breaker
D. Transformer
*Correct Answer: C. Circuit breaker
,Rationale: Circuit breakers automatically interrupt excessive
current caused by overloads or short circuits.
5. Ohm's Law states that voltage equals:
A. Current × Resistance
B. Power × Resistance
C. Current ÷ Resistance
D. Resistance ÷ Current
*Correct Answer: A. Current × Resistance
Rationale: Ohm's Law is expressed as V = I × R.
6. Electrical power is calculated by which formula?
A. P = V × I
B. P = R ÷ I
C. P = V ÷ R
D. P = I² ÷ R
*Correct Answer: A. P = V × I
Rationale: Electrical power equals voltage multiplied by
current.
7. Which instrument measures electrical current?
A. Voltmeter
B. Ohmmeter
, C. Ammeter
D. Megohmmeter
*Correct Answer: C. Ammeter
Rationale: An ammeter measures current flow in amperes.
8. What is the standard frequency of utility power in the
United States?
A. 25 Hz
B. 50 Hz
C. 60 Hz
D. 120 Hz
*Correct Answer: C. 60 Hz
Rationale: The U.S. electrical grid operates at 60 hertz.
9. Which NEC chapter contains general requirements?
A. Chapter 1
B. Chapter 4
C. Chapter 6
D. Chapter 9
*Correct Answer: A. Chapter 1
Rationale: Chapter 1 covers general requirements applicable
throughout the NEC.
EXAM QUESTIONS AND CORRECT ANSWERS
(VERIFIED ANSWERS) Q&A 2026 | INSTANT
DOWNLOAD PDF
1. Which electrical code is the primary standard used for most
electrical installations in Colorado?
A. International Building Code (IBC)
B. International Residential Code (IRC)
C. National Electrical Code (NEC)
D. National Fire Protection Standard 72 (NFPA 72)
*Correct Answer: C. National Electrical Code (NEC)
Rationale: The NEC (NFPA 70) establishes the minimum
requirements for safe electrical installations and is the primary
code adopted throughout Colorado, subject to local
amendments.
2. What is the primary purpose of grounding an electrical
system?
A. Increase voltage
B. Improve efficiency
C. Provide a safe path for fault current
D. Reduce conductor resistance
,*Correct Answer: C. Provide a safe path for fault current
Rationale: Grounding protects people and equipment by
providing a low-impedance path for fault current, allowing
overcurrent devices to operate quickly.
3. Which conductor is intentionally connected to earth at the
service equipment?
A. Equipment grounding conductor
B. Grounded (neutral) conductor
C. Hot conductor
D. Traveler conductor
*Correct Answer: B. Grounded (neutral) conductor
Rationale: The grounded conductor is bonded to earth at the
service disconnect to establish system voltage and facilitate
fault clearing.
4. What device protects a circuit primarily from overloads and
short circuits?
A. Disconnect switch
B. Relay
C. Circuit breaker
D. Transformer
*Correct Answer: C. Circuit breaker
,Rationale: Circuit breakers automatically interrupt excessive
current caused by overloads or short circuits.
5. Ohm's Law states that voltage equals:
A. Current × Resistance
B. Power × Resistance
C. Current ÷ Resistance
D. Resistance ÷ Current
*Correct Answer: A. Current × Resistance
Rationale: Ohm's Law is expressed as V = I × R.
6. Electrical power is calculated by which formula?
A. P = V × I
B. P = R ÷ I
C. P = V ÷ R
D. P = I² ÷ R
*Correct Answer: A. P = V × I
Rationale: Electrical power equals voltage multiplied by
current.
7. Which instrument measures electrical current?
A. Voltmeter
B. Ohmmeter
, C. Ammeter
D. Megohmmeter
*Correct Answer: C. Ammeter
Rationale: An ammeter measures current flow in amperes.
8. What is the standard frequency of utility power in the
United States?
A. 25 Hz
B. 50 Hz
C. 60 Hz
D. 120 Hz
*Correct Answer: C. 60 Hz
Rationale: The U.S. electrical grid operates at 60 hertz.
9. Which NEC chapter contains general requirements?
A. Chapter 1
B. Chapter 4
C. Chapter 6
D. Chapter 9
*Correct Answer: A. Chapter 1
Rationale: Chapter 1 covers general requirements applicable
throughout the NEC.
