NORTH DAKOTA MASTER ELECTRICIAN
EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR JUST RELEASED
1.
According to the National Electrical Code, what is the
primary purpose of requiring electrical installations to comply
with minimum safety standards throughout their design,
installation, and maintenance?
A. To reduce installation costs for contractors
B. To provide practical safeguarding of persons and property
from electrical hazards
C. To guarantee uninterrupted electrical service under every
condition
D. To maximize equipment operating efficiency regardless of
installation quality
Correct Answer: B
Rationale: NEC 90.1(A) states that the purpose of the Code is
the practical safeguarding of persons and property from
hazards arising from the use of electricity. It is intended to
establish minimum safety requirements rather than guarantee
service continuity or equipment efficiency.
,2.
When determining whether an electrical installation complies
with NEC requirements, which statement best describes the
authority and responsibility of the Authority Having
Jurisdiction (AHJ)?
A. The AHJ only enforces manufacturer recommendations.
B. The AHJ has responsibility for interpreting the Code,
approving equipment, and enforcing applicable requirements.
C. The AHJ can modify NEC requirements without legal
authority.
D. The AHJ only inspects residential installations.
Correct Answer: B
Rationale: NEC Article 100 defines the AHJ as the
organization or individual responsible for interpreting the
Code, approving equipment and materials, and enforcing
Code compliance.
3.
During the installation of electrical equipment, why must all
listed or labeled equipment be installed according to the
manufacturer's instructions included with the listing?
A. Manufacturer instructions are optional suggestions only.
B. Following the listing instructions maintains the
equipment's evaluated safety performance and Code
compliance.
,C. Manufacturer instructions only apply to industrial
occupancies.
D. Compliance is required only when requested by the
customer.
Correct Answer: B
Rationale: NEC 110.3(B) requires listed or labeled equipment
to be installed and used according to the instructions included
in the listing or labeling because the equipment was evaluated
under those conditions.
4.
An electrician is installing electrical equipment in a damp
mechanical room where moisture may be present. Which
installation practice is most consistent with NEC
requirements?
A. Install equipment regardless of environmental ratings.
B. Select equipment specifically identified for damp or wet
locations as applicable.
C. Seal indoor equipment with paint after installation.
D. Reduce circuit voltage to avoid moisture concerns.
Correct Answer: B
Rationale: NEC 110.11 requires equipment exposed to
moisture or deteriorating agents to be suitable for the
environment where it is installed.
, 5.
When calculating conductor ampacity, why is it important to
consider both ambient temperature correction factors and the
number of current-carrying conductors installed together?
A. They only affect conductor color selection.
B. They may reduce allowable ampacity below the
conductor's base rating.
C. They only apply to aluminum conductors.
D. They eliminate the need for overcurrent protection.
Correct Answer: B
Rationale: NEC 310 requires ampacity adjustment for
ambient temperature and conductor bundling because
excessive heat reduces conductor current-carrying capability.
6.
Which overcurrent protective device is specifically intended
to open an electrical circuit automatically whenever excessive
current creates unsafe operating conditions?
A. Disconnect switch
B. Grounding electrode conductor
C. Fuse or circuit breaker
D. Junction box
Correct Answer: C
EXAMINATION COMPLETE QUESTIONS
AND DETAILED SOLUTIONS LATEST
UPDATE THIS YEAR JUST RELEASED
1.
According to the National Electrical Code, what is the
primary purpose of requiring electrical installations to comply
with minimum safety standards throughout their design,
installation, and maintenance?
A. To reduce installation costs for contractors
B. To provide practical safeguarding of persons and property
from electrical hazards
C. To guarantee uninterrupted electrical service under every
condition
D. To maximize equipment operating efficiency regardless of
installation quality
Correct Answer: B
Rationale: NEC 90.1(A) states that the purpose of the Code is
the practical safeguarding of persons and property from
hazards arising from the use of electricity. It is intended to
establish minimum safety requirements rather than guarantee
service continuity or equipment efficiency.
,2.
When determining whether an electrical installation complies
with NEC requirements, which statement best describes the
authority and responsibility of the Authority Having
Jurisdiction (AHJ)?
A. The AHJ only enforces manufacturer recommendations.
B. The AHJ has responsibility for interpreting the Code,
approving equipment, and enforcing applicable requirements.
C. The AHJ can modify NEC requirements without legal
authority.
D. The AHJ only inspects residential installations.
Correct Answer: B
Rationale: NEC Article 100 defines the AHJ as the
organization or individual responsible for interpreting the
Code, approving equipment and materials, and enforcing
Code compliance.
3.
During the installation of electrical equipment, why must all
listed or labeled equipment be installed according to the
manufacturer's instructions included with the listing?
A. Manufacturer instructions are optional suggestions only.
B. Following the listing instructions maintains the
equipment's evaluated safety performance and Code
compliance.
,C. Manufacturer instructions only apply to industrial
occupancies.
D. Compliance is required only when requested by the
customer.
Correct Answer: B
Rationale: NEC 110.3(B) requires listed or labeled equipment
to be installed and used according to the instructions included
in the listing or labeling because the equipment was evaluated
under those conditions.
4.
An electrician is installing electrical equipment in a damp
mechanical room where moisture may be present. Which
installation practice is most consistent with NEC
requirements?
A. Install equipment regardless of environmental ratings.
B. Select equipment specifically identified for damp or wet
locations as applicable.
C. Seal indoor equipment with paint after installation.
D. Reduce circuit voltage to avoid moisture concerns.
Correct Answer: B
Rationale: NEC 110.11 requires equipment exposed to
moisture or deteriorating agents to be suitable for the
environment where it is installed.
, 5.
When calculating conductor ampacity, why is it important to
consider both ambient temperature correction factors and the
number of current-carrying conductors installed together?
A. They only affect conductor color selection.
B. They may reduce allowable ampacity below the
conductor's base rating.
C. They only apply to aluminum conductors.
D. They eliminate the need for overcurrent protection.
Correct Answer: B
Rationale: NEC 310 requires ampacity adjustment for
ambient temperature and conductor bundling because
excessive heat reduces conductor current-carrying capability.
6.
Which overcurrent protective device is specifically intended
to open an electrical circuit automatically whenever excessive
current creates unsafe operating conditions?
A. Disconnect switch
B. Grounding electrode conductor
C. Fuse or circuit breaker
D. Junction box
Correct Answer: C
