New Mexico EL-1 Electrical Distribution Systems Contractor Exam QUESTIONS AND
CORRECT ANSWERS WITH RATIONALES
Exam coverage
• distribution circuits
• conductors
• transformers
• switchgear
• overhead systems
• underground systems
• grounding
• protection
• testing
• job safety
,1. Which statement most accurately explains the principle involved when Distribution
systems deliver electrical energy through conductors, transformers, switching, and
protective equipment.. Which answer best applies to the underlying EL-1 distribution
systems contractor concept in this situation?
A. Conductors must be selected for voltage, ampacity, environment, installation method, and
mechanical conditions..
B. Transformers change voltage levels and require proper connections, cooling, protection,
and clearances..
C. Distribution systems deliver electrical energy through conductors, transformers, switching,
and protective equipment..
D. Switchgear provides controlled switching, isolation, and protection for distribution
equipment..
Correct answer: C
Rationale: The correct choice directly states the governing principle: Distribution systems
deliver electrical energy through conductors, transformers, switching, and protective
equipment.. The alternatives address related topics but do not directly answer the issue being
tested.
2. During a service situation, which option best describes why Conductors must be
selected for voltage, ampacity, environment, installation method, and mechanical
conditions.. Which answer best applies to the underlying EL-1 distribution systems
contractor concept in this situation?
,A. Overhead systems require suitable structures, clearances, conductors, and
weather-resistant installation practices..
B. Switchgear provides controlled switching, isolation, and protection for distribution
equipment..
C. Conductors must be selected for voltage, ampacity, environment, installation method, and
mechanical conditions..
D. Transformers change voltage levels and require proper connections, cooling, protection,
and clearances..
Correct answer: C
Rationale: The correct choice directly states the governing principle: Conductors must be
selected for voltage, ampacity, environment, installation method, and mechanical conditions..
The alternatives address related topics but do not directly answer the issue being tested.
3. A technician is evaluating a condition; which response is most appropriate because
Transformers change voltage levels and require proper connections, cooling,
protection, and clearances.. Which answer best applies to the underlying EL-1
distribution systems contractor concept in this situation?
A. Switchgear provides controlled switching, isolation, and protection for distribution
equipment..
B. Underground systems require suitable cable, conduit, vaults, grounding, and protection
from physical damage..
, C. Transformers change voltage levels and require proper connections, cooling, protection,
and clearances..
D. Overhead systems require suitable structures, clearances, conductors, and
weather-resistant installation practices..
Correct answer: C
Rationale: The correct choice directly states the governing principle: Transformers change
voltage levels and require proper connections, cooling, protection, and clearances.. The
alternatives address related topics but do not directly answer the issue being tested.
4. Which choice correctly identifies the main reason that Switchgear provides
controlled switching, isolation, and protection for distribution equipment.. Which
answer best applies to the underlying EL-1 distribution systems contractor concept in
this situation?
A. Underground systems require suitable cable, conduit, vaults, grounding, and protection
from physical damage..
B. Overhead systems require suitable structures, clearances, conductors, and
weather-resistant installation practices..
C. Grounding and bonding provide fault-current paths and help establish safe reference
conditions..
D. Switchgear provides controlled switching, isolation, and protection for distribution
equipment..
CORRECT ANSWERS WITH RATIONALES
Exam coverage
• distribution circuits
• conductors
• transformers
• switchgear
• overhead systems
• underground systems
• grounding
• protection
• testing
• job safety
,1. Which statement most accurately explains the principle involved when Distribution
systems deliver electrical energy through conductors, transformers, switching, and
protective equipment.. Which answer best applies to the underlying EL-1 distribution
systems contractor concept in this situation?
A. Conductors must be selected for voltage, ampacity, environment, installation method, and
mechanical conditions..
B. Transformers change voltage levels and require proper connections, cooling, protection,
and clearances..
C. Distribution systems deliver electrical energy through conductors, transformers, switching,
and protective equipment..
D. Switchgear provides controlled switching, isolation, and protection for distribution
equipment..
Correct answer: C
Rationale: The correct choice directly states the governing principle: Distribution systems
deliver electrical energy through conductors, transformers, switching, and protective
equipment.. The alternatives address related topics but do not directly answer the issue being
tested.
2. During a service situation, which option best describes why Conductors must be
selected for voltage, ampacity, environment, installation method, and mechanical
conditions.. Which answer best applies to the underlying EL-1 distribution systems
contractor concept in this situation?
,A. Overhead systems require suitable structures, clearances, conductors, and
weather-resistant installation practices..
B. Switchgear provides controlled switching, isolation, and protection for distribution
equipment..
C. Conductors must be selected for voltage, ampacity, environment, installation method, and
mechanical conditions..
D. Transformers change voltage levels and require proper connections, cooling, protection,
and clearances..
Correct answer: C
Rationale: The correct choice directly states the governing principle: Conductors must be
selected for voltage, ampacity, environment, installation method, and mechanical conditions..
The alternatives address related topics but do not directly answer the issue being tested.
3. A technician is evaluating a condition; which response is most appropriate because
Transformers change voltage levels and require proper connections, cooling,
protection, and clearances.. Which answer best applies to the underlying EL-1
distribution systems contractor concept in this situation?
A. Switchgear provides controlled switching, isolation, and protection for distribution
equipment..
B. Underground systems require suitable cable, conduit, vaults, grounding, and protection
from physical damage..
, C. Transformers change voltage levels and require proper connections, cooling, protection,
and clearances..
D. Overhead systems require suitable structures, clearances, conductors, and
weather-resistant installation practices..
Correct answer: C
Rationale: The correct choice directly states the governing principle: Transformers change
voltage levels and require proper connections, cooling, protection, and clearances.. The
alternatives address related topics but do not directly answer the issue being tested.
4. Which choice correctly identifies the main reason that Switchgear provides
controlled switching, isolation, and protection for distribution equipment.. Which
answer best applies to the underlying EL-1 distribution systems contractor concept in
this situation?
A. Underground systems require suitable cable, conduit, vaults, grounding, and protection
from physical damage..
B. Overhead systems require suitable structures, clearances, conductors, and
weather-resistant installation practices..
C. Grounding and bonding provide fault-current paths and help establish safe reference
conditions..
D. Switchgear provides controlled switching, isolation, and protection for distribution
equipment..
