NEW MEXICO EL 1J ELECTRICAL
DISTRIBUTION JOURNEYMAN FINAL
EXAM PREP QUESTIONS WITH
CORRECT ANSWERS
1. According to OSHA 1910.269, what is the Minimum Approach Distance (MAD) for a phase-
to-ground exposure at a nominal voltage of 13.8 kV for an unqualified employee?
A. 2 feet 1 inch
B. 3 feet 7 inches
C. 10 feet 0 inches
D. 5 feet 2 inches
Answer: C
Conceptual Explanation: For unqualified employees, the minimum approach distance to
energized overhead lines is 10 feet for voltages up to 50kV.
2. In a Delta-Wye transformer bank, what is the phase shift between the primary and
secondary voltages?
A. 0 degrees
B. 180 degrees
C. 90 degrees
,D. 30 degrees
Answer: D
Conceptual Explanation: Standard ANSI Delta-Wye configurations result in a 30-degree
phase shift where the secondary leads or lags the primary.
3. When installing a down guy, what is the standard ‘lead’ to ‘height’ ratio often used to
ensure structural stability?
A. 1:1
B. 1:2
C. 2:1
D. 1:4
Answer: A
Conceptual Explanation: A 1:1 ratio (lead equals height) is considered the ideal standard
for maximum strength in guying applications.
4. What is the primary purpose of a ‘stress cone’ in a high-voltage cable termination?
A. To provide physical support for the cable weight
B. To control the electrical field at the shield termination
C. To protect the cable from ultraviolet light
D. To increase the ampacity of the conductor
, Answer: B
Conceptual Explanation: A stress cone spreads the electrical flux lines to prevent
dielectric breakdown at the point where the cable shield is removed.
5. An ACSR conductor is labeled as ‘4/0 Penguin’. What does ACSR stand for?
A. Alloy Conductor Structural Rigid
B. All Copper Standard Rod
C. Aluminum Core Silicon Reinforced
D. Aluminum Conductor Steel Reinforced
Answer: D
Conceptual Explanation: ACSR stands for Aluminum Conductor Steel Reinforced,
commonly used for its high strength-to-weight ratio in distribution.
6. When testing a transformer, what does a ‘Turns Ratio’ test specifically identify?
A. Shorted turns or incorrect winding ratios
B. Oil dielectric strength
C. Insulation resistance
D. Core loss under full load
Answer: A
DISTRIBUTION JOURNEYMAN FINAL
EXAM PREP QUESTIONS WITH
CORRECT ANSWERS
1. According to OSHA 1910.269, what is the Minimum Approach Distance (MAD) for a phase-
to-ground exposure at a nominal voltage of 13.8 kV for an unqualified employee?
A. 2 feet 1 inch
B. 3 feet 7 inches
C. 10 feet 0 inches
D. 5 feet 2 inches
Answer: C
Conceptual Explanation: For unqualified employees, the minimum approach distance to
energized overhead lines is 10 feet for voltages up to 50kV.
2. In a Delta-Wye transformer bank, what is the phase shift between the primary and
secondary voltages?
A. 0 degrees
B. 180 degrees
C. 90 degrees
,D. 30 degrees
Answer: D
Conceptual Explanation: Standard ANSI Delta-Wye configurations result in a 30-degree
phase shift where the secondary leads or lags the primary.
3. When installing a down guy, what is the standard ‘lead’ to ‘height’ ratio often used to
ensure structural stability?
A. 1:1
B. 1:2
C. 2:1
D. 1:4
Answer: A
Conceptual Explanation: A 1:1 ratio (lead equals height) is considered the ideal standard
for maximum strength in guying applications.
4. What is the primary purpose of a ‘stress cone’ in a high-voltage cable termination?
A. To provide physical support for the cable weight
B. To control the electrical field at the shield termination
C. To protect the cable from ultraviolet light
D. To increase the ampacity of the conductor
, Answer: B
Conceptual Explanation: A stress cone spreads the electrical flux lines to prevent
dielectric breakdown at the point where the cable shield is removed.
5. An ACSR conductor is labeled as ‘4/0 Penguin’. What does ACSR stand for?
A. Alloy Conductor Structural Rigid
B. All Copper Standard Rod
C. Aluminum Core Silicon Reinforced
D. Aluminum Conductor Steel Reinforced
Answer: D
Conceptual Explanation: ACSR stands for Aluminum Conductor Steel Reinforced,
commonly used for its high strength-to-weight ratio in distribution.
6. When testing a transformer, what does a ‘Turns Ratio’ test specifically identify?
A. Shorted turns or incorrect winding ratios
B. Oil dielectric strength
C. Insulation resistance
D. Core loss under full load
Answer: A
