Journeyman Lineman Exam Practice
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A distribution circuit operating at 13.2 kV has been de-energized for
scheduled maintenance. Before beginning work, the crew leader
instructs the journeyman lineman to verify that the line is de-
energized, apply protective grounds, and establish an equipotential
work zone. What is the primary purpose of establishing an
equipotential zone before work begins?
A. To improve the electrical conductivity of the line during repairs
B. To protect workers from hazardous voltage differences caused by
accidental energization or induced voltages
C. To reduce transformer losses during maintenance
D. To increase the current-carrying capacity of grounding conductors
Rationale: Establishing an equipotential work zone ensures that workers
and equipment remain at the same electrical potential, greatly reducing
,the risk of electric shock from induced voltages, backfeed, or accidental
energization.
2. A utility crew is replacing a damaged wooden distribution pole. Before
climbing the replacement pole, the journeyman lineman performs a
visual inspection and sounding test. What is the primary purpose of
sounding a wooden utility pole with a hammer?
A. To determine conductor tension
B. To verify transformer grounding resistance
C. To identify internal decay, voids, or structural weakness that may not be
visible externally
D. To confirm proper pole class rating
Rationale: Sounding a pole helps detect hidden decay or internal
deterioration by listening for changes in sound that indicate compromised
structural integrity.
3. During the installation of compression connectors on aluminum
conductors, the manufacturer's specifications require the use of a
specific die set and the prescribed number of compressions. Why is
following these specifications essential?
A. To reduce conductor sag
B. To ensure the connector develops the required mechanical strength and
electrical conductivity
,C. To eliminate the need for insulation
D. To prevent conductor oxidation through increased pressure only
Rationale: Proper die selection and compression sequence ensure the
connector achieves its rated electrical and mechanical performance,
minimizing failures and overheating.
4. While installing a single-phase distribution transformer, the primary
and secondary bushings must be correctly identified before making
connections. Which transformer winding is normally connected
directly to the utility's primary distribution voltage?
A. Secondary winding
B. Neutral winding
C. Tertiary winding
D. Primary winding
Rationale: The primary winding receives the incoming distribution voltage,
while the secondary winding supplies the reduced utilization voltage to
customers.
5. A lineman is calculating conductor sag for an overhead span during
winter construction. Which environmental factor generally causes
conductor tension to increase the most?
A. High ambient temperature
B. Heavy rainfall only
, C. Cold temperatures causing conductor contraction
D. Increased solar radiation
Rationale: Cold temperatures cause conductors to contract, increasing
mechanical tension if span lengths remain fixed.
6. Before operating an air-break switch with a hot stick, what is the most
important action the journeyman lineman should perform?
A. Measure conductor resistance
B. Inspect nearby transformers only
C. Verify the switching order, inspect equipment condition, and ensure
proper PPE is being used
D. Remove all grounds before inspection
Rationale: Proper switching procedures require verifying equipment status,
inspecting for defects, confirming switching orders, and using appropriate
PPE to minimize hazards.
7. A three-phase distribution system loses one phase because of a broken
conductor. What condition is most likely to occur if customers continue
operating three-phase motors?
A. Motors automatically increase efficiency.
B. Motors may single-phase, overheat, and sustain severe damage.
C. Voltage becomes perfectly balanced.
D. Transformer losses decrease significantly.
Questions And Correct Answers
(Verified Answers) Plus Rationale 2026
Q&A| Instant Download Pdf
1. A distribution circuit operating at 13.2 kV has been de-energized for
scheduled maintenance. Before beginning work, the crew leader
instructs the journeyman lineman to verify that the line is de-
energized, apply protective grounds, and establish an equipotential
work zone. What is the primary purpose of establishing an
equipotential zone before work begins?
A. To improve the electrical conductivity of the line during repairs
B. To protect workers from hazardous voltage differences caused by
accidental energization or induced voltages
C. To reduce transformer losses during maintenance
D. To increase the current-carrying capacity of grounding conductors
Rationale: Establishing an equipotential work zone ensures that workers
and equipment remain at the same electrical potential, greatly reducing
,the risk of electric shock from induced voltages, backfeed, or accidental
energization.
2. A utility crew is replacing a damaged wooden distribution pole. Before
climbing the replacement pole, the journeyman lineman performs a
visual inspection and sounding test. What is the primary purpose of
sounding a wooden utility pole with a hammer?
A. To determine conductor tension
B. To verify transformer grounding resistance
C. To identify internal decay, voids, or structural weakness that may not be
visible externally
D. To confirm proper pole class rating
Rationale: Sounding a pole helps detect hidden decay or internal
deterioration by listening for changes in sound that indicate compromised
structural integrity.
3. During the installation of compression connectors on aluminum
conductors, the manufacturer's specifications require the use of a
specific die set and the prescribed number of compressions. Why is
following these specifications essential?
A. To reduce conductor sag
B. To ensure the connector develops the required mechanical strength and
electrical conductivity
,C. To eliminate the need for insulation
D. To prevent conductor oxidation through increased pressure only
Rationale: Proper die selection and compression sequence ensure the
connector achieves its rated electrical and mechanical performance,
minimizing failures and overheating.
4. While installing a single-phase distribution transformer, the primary
and secondary bushings must be correctly identified before making
connections. Which transformer winding is normally connected
directly to the utility's primary distribution voltage?
A. Secondary winding
B. Neutral winding
C. Tertiary winding
D. Primary winding
Rationale: The primary winding receives the incoming distribution voltage,
while the secondary winding supplies the reduced utilization voltage to
customers.
5. A lineman is calculating conductor sag for an overhead span during
winter construction. Which environmental factor generally causes
conductor tension to increase the most?
A. High ambient temperature
B. Heavy rainfall only
, C. Cold temperatures causing conductor contraction
D. Increased solar radiation
Rationale: Cold temperatures cause conductors to contract, increasing
mechanical tension if span lengths remain fixed.
6. Before operating an air-break switch with a hot stick, what is the most
important action the journeyman lineman should perform?
A. Measure conductor resistance
B. Inspect nearby transformers only
C. Verify the switching order, inspect equipment condition, and ensure
proper PPE is being used
D. Remove all grounds before inspection
Rationale: Proper switching procedures require verifying equipment status,
inspecting for defects, confirming switching orders, and using appropriate
PPE to minimize hazards.
7. A three-phase distribution system loses one phase because of a broken
conductor. What condition is most likely to occur if customers continue
operating three-phase motors?
A. Motors automatically increase efficiency.
B. Motors may single-phase, overheat, and sustain severe damage.
C. Voltage becomes perfectly balanced.
D. Transformer losses decrease significantly.
