Colorado Electrical Inspector Examination
(DORA/ICC-based certification) Questions and
Correct Answers (Verified Answers) Plus Rationale
2027 Q&A| Instant Download Pdf
1. What is the primary purpose of an electrical inspection?
A. To determine the cost of an electrical installation
B. To verify that electrical work complies with applicable codes and
approved plans
C. To determine the electrician's hourly wage
D. To approve the architectural design of a building
Answer: B. To verify that electrical work complies with applicable
codes and approved plans
Rationale: Electrical inspection is primarily a code-compliance
function. The inspector evaluates the installation against the
applicable electrical code, adopted amendments, approved
construction documents, and other requirements within the
inspector's jurisdiction.
, 2. Which organization publishes the National Electrical Code (NEC)?
A. ICC
B. OSHA
C. NFPA
D. IEEE
Answer: C. NFPA
Rationale: The National Electrical Code, designated NFPA 70, is
published by the National Fire Protection Association. Jurisdictions
may adopt the NEC into law, sometimes with state or local
amendments.
3. In an electrical installation, what is the purpose of a grounding
electrode system?
A. To increase normal circuit voltage
B. To provide a connection to earth for specified electrical systems and
equipment
C. To replace circuit overcurrent protection
D. To eliminate the need for equipment grounding conductors
Answer: B. To provide a connection to earth for specified electrical
systems and equipment
,Rationale: A grounding electrode system connects the electrical
system to earth through recognized grounding electrodes. It serves
functions such as stabilizing voltage to earth and assisting in the
dissipation of certain electrical disturbances. It does not replace
equipment grounding conductors or overcurrent protection.
4. Which conductor is generally identified by green insulation or a
green marking?
A. Ungrounded conductor
B. Grounded conductor
C. Equipment grounding conductor
D. Switch-leg conductor
Answer: C. Equipment grounding conductor
Rationale: Equipment grounding conductors are commonly identified
by green insulation or green markings. Their purpose is to provide a
low-impedance path for fault current back toward the source so that
overcurrent protective devices can operate.
5. What is the primary function of an overcurrent protective device?
A. Increase available fault current
B. Protect conductors and equipment from excessive current
, C. Maintain constant electrical frequency
D. Ground the building structure
Answer: B. Protect conductors and equipment from excessive current
Rationale: Fuses and circuit breakers provide overcurrent protection.
They are intended to open a circuit when current exceeds permitted
levels because of overloads, short circuits, or other fault conditions.
6. What is the general purpose of a circuit breaker?
A. To provide a permanent connection between conductors
B. To interrupt current when specified abnormal conditions occur
C. To increase conductor ampacity
D. To serve as a grounding electrode
Answer: B. To interrupt current when specified abnormal conditions
occur
Rationale: A circuit breaker is an overcurrent protective device that
can automatically interrupt current during overload or short-circuit
conditions and can generally be manually operated to open or close
the circuit.
7. Which electrical quantity is measured in amperes?
A. Voltage
B. Resistance
(DORA/ICC-based certification) Questions and
Correct Answers (Verified Answers) Plus Rationale
2027 Q&A| Instant Download Pdf
1. What is the primary purpose of an electrical inspection?
A. To determine the cost of an electrical installation
B. To verify that electrical work complies with applicable codes and
approved plans
C. To determine the electrician's hourly wage
D. To approve the architectural design of a building
Answer: B. To verify that electrical work complies with applicable
codes and approved plans
Rationale: Electrical inspection is primarily a code-compliance
function. The inspector evaluates the installation against the
applicable electrical code, adopted amendments, approved
construction documents, and other requirements within the
inspector's jurisdiction.
, 2. Which organization publishes the National Electrical Code (NEC)?
A. ICC
B. OSHA
C. NFPA
D. IEEE
Answer: C. NFPA
Rationale: The National Electrical Code, designated NFPA 70, is
published by the National Fire Protection Association. Jurisdictions
may adopt the NEC into law, sometimes with state or local
amendments.
3. In an electrical installation, what is the purpose of a grounding
electrode system?
A. To increase normal circuit voltage
B. To provide a connection to earth for specified electrical systems and
equipment
C. To replace circuit overcurrent protection
D. To eliminate the need for equipment grounding conductors
Answer: B. To provide a connection to earth for specified electrical
systems and equipment
,Rationale: A grounding electrode system connects the electrical
system to earth through recognized grounding electrodes. It serves
functions such as stabilizing voltage to earth and assisting in the
dissipation of certain electrical disturbances. It does not replace
equipment grounding conductors or overcurrent protection.
4. Which conductor is generally identified by green insulation or a
green marking?
A. Ungrounded conductor
B. Grounded conductor
C. Equipment grounding conductor
D. Switch-leg conductor
Answer: C. Equipment grounding conductor
Rationale: Equipment grounding conductors are commonly identified
by green insulation or green markings. Their purpose is to provide a
low-impedance path for fault current back toward the source so that
overcurrent protective devices can operate.
5. What is the primary function of an overcurrent protective device?
A. Increase available fault current
B. Protect conductors and equipment from excessive current
, C. Maintain constant electrical frequency
D. Ground the building structure
Answer: B. Protect conductors and equipment from excessive current
Rationale: Fuses and circuit breakers provide overcurrent protection.
They are intended to open a circuit when current exceeds permitted
levels because of overloads, short circuits, or other fault conditions.
6. What is the general purpose of a circuit breaker?
A. To provide a permanent connection between conductors
B. To interrupt current when specified abnormal conditions occur
C. To increase conductor ampacity
D. To serve as a grounding electrode
Answer: B. To interrupt current when specified abnormal conditions
occur
Rationale: A circuit breaker is an overcurrent protective device that
can automatically interrupt current during overload or short-circuit
conditions and can generally be manually operated to open or close
the circuit.
7. Which electrical quantity is measured in amperes?
A. Voltage
B. Resistance
