New Mexico EL-1J Electrical Distribution
Journeyman Exam – 200 Practice Questions with
Answers & Explanations (NM CID) |instant
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Table of Contents:
Section 1: Safety, OSHA & NFPA 70E (Questions 1–40)
Section 2: Overhead Line Construction (Questions 41–80)
Section 3: Underground Distribution Systems (Questions 81–110)
Section 4: Transformers, Substations & Protection (Questions 111–140)
Section 5: New Mexico Administrative Code (NMAC) & Licensing (Questions 141–170)
Section 6: Electrical Theory & Calculations (Questions 171–200)
Includes: Answer Key with Detailed Explanations for Every Question
Covers: NESC, OSHA 1910.269, NFPA 70E, NMAC 14.6.6.10, Distribution Systems,
Substations, and Electrical Theory
Section 1: Safety, OSHA, and NFPA 70E (Questions 1-40)
1. According to NESC, what is the minimum approach distance for qualified workers
on energized 25 kV lines?
A) 2 ft 1 in
B) 2 ft 4 in
,C) 2 ft 7 in
D) 3 ft
Answer: C) 2 ft 7 in
Explanation: NESC Table 410-1 specifies minimum approach distances based on voltage.
For 25 kV phase-to-phase, the listed distance for qualified workers is 2 ft 7 in .
2. Which OSHA standard specifically governs safety requirements for electric power
generation, transmission, and distribution work?
A) 1910.1200 (Hazard Communication)
B) 1910.269
C) 1926.1402 (Cranes)
D) 1910.333 (Electrical safe work practices)
Answer: B) 1910.269
Explanation: OSHA 1910.269 is the dedicated standard for power generation, transmission,
and distribution, covering minimum approach distances, PPE, and work practices for line
workers .
3. Under NFPA 70E, what is the primary purpose of establishing an arc-flash
boundary?
A) To limit the distance a worker can stand from a faulted conductor
B) To define the area where personal protective equipment (PPE) is required
,C) To determine the maximum voltage a system can carry
D) To set the minimum spacing between conductors on a pole
Answer: B) To define the area where personal protective equipment (PPE) is required
Explanation: The arc-flash boundary marks the distance within which a worker could receive
a second-degree burn; PPE must be worn inside this boundary .
4. The minimum approach distance (MAD) for a 15 kV uninsulated overhead line
under OSHA 1910.269 is:
A) 10 ft
B) 12 ft
C) 15 ft
D) 18 ft
Answer: B) 12 ft
Explanation: OSHA Table 1-1 (1910.269) specifies a minimum approach distance of 12 feet
for uninsulated conductors up to 15 kV phase-to-phase .
5. In a lockout/tagout (LOTO) procedure for a high-voltage breaker, which step must
be performed first?
A) Apply the lock
B) Verify zero voltage with a test instrument
, C) Remove the fuse
D) Notify the control room
Answer: B) Verify zero voltage with a test instrument
Explanation: OSHA 1910.333 and 1910.269 require verification of de-energization (testing
for absence of voltage) before applying LOTO devices .
6. What is the primary purpose of grounding in electrical distribution systems?
A) Cost reduction
B) Personnel safety and equipment protection
C) Voltage regulation
D) Power factor improvement
Answer: B) Personnel safety and equipment protection
Explanation: Grounding provides a low-impedance path for fault current, allowing protective
devices to operate quickly and reducing step and touch potentials .
7. The "Call Before You Dig" law in New Mexico primarily aims to:
A) Prevent damage to underground gas pipelines only
B) Protect all underground utilities from excavation damage
C) Ensure proper grounding of buried cables
D) Reduce the cost of street repairs
Journeyman Exam – 200 Practice Questions with
Answers & Explanations (NM CID) |instant
Download
Table of Contents:
Section 1: Safety, OSHA & NFPA 70E (Questions 1–40)
Section 2: Overhead Line Construction (Questions 41–80)
Section 3: Underground Distribution Systems (Questions 81–110)
Section 4: Transformers, Substations & Protection (Questions 111–140)
Section 5: New Mexico Administrative Code (NMAC) & Licensing (Questions 141–170)
Section 6: Electrical Theory & Calculations (Questions 171–200)
Includes: Answer Key with Detailed Explanations for Every Question
Covers: NESC, OSHA 1910.269, NFPA 70E, NMAC 14.6.6.10, Distribution Systems,
Substations, and Electrical Theory
Section 1: Safety, OSHA, and NFPA 70E (Questions 1-40)
1. According to NESC, what is the minimum approach distance for qualified workers
on energized 25 kV lines?
A) 2 ft 1 in
B) 2 ft 4 in
,C) 2 ft 7 in
D) 3 ft
Answer: C) 2 ft 7 in
Explanation: NESC Table 410-1 specifies minimum approach distances based on voltage.
For 25 kV phase-to-phase, the listed distance for qualified workers is 2 ft 7 in .
2. Which OSHA standard specifically governs safety requirements for electric power
generation, transmission, and distribution work?
A) 1910.1200 (Hazard Communication)
B) 1910.269
C) 1926.1402 (Cranes)
D) 1910.333 (Electrical safe work practices)
Answer: B) 1910.269
Explanation: OSHA 1910.269 is the dedicated standard for power generation, transmission,
and distribution, covering minimum approach distances, PPE, and work practices for line
workers .
3. Under NFPA 70E, what is the primary purpose of establishing an arc-flash
boundary?
A) To limit the distance a worker can stand from a faulted conductor
B) To define the area where personal protective equipment (PPE) is required
,C) To determine the maximum voltage a system can carry
D) To set the minimum spacing between conductors on a pole
Answer: B) To define the area where personal protective equipment (PPE) is required
Explanation: The arc-flash boundary marks the distance within which a worker could receive
a second-degree burn; PPE must be worn inside this boundary .
4. The minimum approach distance (MAD) for a 15 kV uninsulated overhead line
under OSHA 1910.269 is:
A) 10 ft
B) 12 ft
C) 15 ft
D) 18 ft
Answer: B) 12 ft
Explanation: OSHA Table 1-1 (1910.269) specifies a minimum approach distance of 12 feet
for uninsulated conductors up to 15 kV phase-to-phase .
5. In a lockout/tagout (LOTO) procedure for a high-voltage breaker, which step must
be performed first?
A) Apply the lock
B) Verify zero voltage with a test instrument
, C) Remove the fuse
D) Notify the control room
Answer: B) Verify zero voltage with a test instrument
Explanation: OSHA 1910.333 and 1910.269 require verification of de-energization (testing
for absence of voltage) before applying LOTO devices .
6. What is the primary purpose of grounding in electrical distribution systems?
A) Cost reduction
B) Personnel safety and equipment protection
C) Voltage regulation
D) Power factor improvement
Answer: B) Personnel safety and equipment protection
Explanation: Grounding provides a low-impedance path for fault current, allowing protective
devices to operate quickly and reducing step and touch potentials .
7. The "Call Before You Dig" law in New Mexico primarily aims to:
A) Prevent damage to underground gas pipelines only
B) Protect all underground utilities from excavation damage
C) Ensure proper grounding of buried cables
D) Reduce the cost of street repairs
