NEW MEXICO (NM) EL‑1J JOURNEYMAN ELECTRICAL DISTRIBUTION SYSTEMS, INCLUDING TRANSMISSION LINES EXAM QUESTIONS AND 100% VERIFIED ANSWERS (RECENTLY UPDATED)....

1. According to NESC, what is the minimum approach distance for
qualified workers on energized 25kV lines?
• A) 2 feet 1 inch
• B) 2 feet 4 inches
• C) 2 feet 7 inches
• D) 3 feet Answer: C) 2 feet 7 inches
2. The primary purpose of grounding in electrical distribution systems is:
• A) Cost reduction
• B) Personnel safety and equipment protection
• C) Voltage regulation
• D) Power factor improvement Answer: B) Personnel safety and
equipment protection
3. What is the maximum voltage that can be worked on with an EE98J
license in New Mexico?
• A) 480V
• B) 1000V
• C) 5000V
• D) 15000V Answer: C) 5000V
4. NESC Rule 410 covers:
• A) Overhead line construction
• B) Underground construction
• C) General requirements applying to all supply stations
• D) Grounding requirements Answer: C) General requirements
applying to all supply stations

,5. The minimum burial depth for direct buried cable rated 5kV-35kV in
normal soil is:
• A) 24 inches
• B) 30 inches
• C) 36 inches
• D) 42 inches Answer: B) 30 inches
6. Arc flash boundaries are determined by:
• A) Voltage level only
• B) Current carrying capacity
• C) Available fault current and clearing time
• D) Conductor size Answer: C) Available fault current and clearing
time
7. According to NESC, the safety factor for guy wires under heavy loading
is:
• A) 2.0
• B) 2.5
• C) 3.0
• D) 4.0 Answer: A) 2.0
8. The minimum clearance between 13.8kV conductors and buildings is:
• A) 8 feet
• B) 10 feet
• C) 12 feet
• D) 15 feet Answer: D) 15 feet
9. Live line tools must be tested:
• A) Monthly
• B) Every 2 years
• C) Before each use
• D) Annually Answer: C) Before each use

,10. The NESC defines "effectively grounded" as a system where:
• A) All equipment is grounded
• B) The coefficient of grounding does not exceed 80%
• C) Ground resistance is less than 25 ohms
• D) Multiple grounds are installed Answer: B) The coefficient of
grounding does not exceed 80%
11. What class of construction is required for crossing over railroads?
• A) Class A
• B) Class B
• C) Class C
• D) Class H Answer: B) Class B
12. The minimum approach distance for unqualified persons to 25kV
equipment is:
• A) 8 feet
• B) 10 feet
• C) 12 feet
• D) 15 feet Answer: B) 10 feet
13. Hot sticks used on 25kV systems should be rated for:
• A) 25kV
• B) 35kV
• C) 50kV
• D) 100kV Answer: D) 100kV
14. The safety factor for wood poles under heavy loading conditions is:
• A) 2.0
• B) 2.5
• C) 3.0
• D) 4.0 Answer: D) 4.0
15. Protective equipment must be inspected:

, • A) Before each use
• B) Weekly
• C) Monthly
• D) Quarterly Answer: A) Before each use
16. The minimum height for overhead supply conductors crossing
highways is:
• A) 15.5 feet
• B) 16.5 feet
• C) 17.5 feet
• D) 18.5 feet Answer: D) 18.5 feet
17. What is the purpose of a load break switch?
• A) Protection only
• B) Isolation only
• C) Load interruption and isolation
• D) Voltage regulation Answer: C) Load interruption and isolation
18. The minimum clearance between communication and supply
conductors on the same pole is:
• A) 24 inches
• B) 30 inches
• C) 40 inches
• D) 48 inches Answer: C) 40 inches
19. Lightning arrester ground leads should be:
• A) As short as possible
• B) At least 8 feet long
• C) Coiled for inductance
• D) Insulated from ground Answer: A) As short as possible
20. The maximum sag-to-span ratio for transmission lines is typically:
• A) 2%