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POWER LINEMAN JOURNEYMAN Newest Exam
Preparation With Complete Questions And Correct
Answers With Rationales Already Graded A+ Brand
New Version!!
QUESTION 1
What is the primary purpose of a transformer in electrical power
distribution?
A) To convert AC to DC
B) To change voltage levels while maintaining frequency
C) To store electrical energy
D) To increase power output
Answer: B
Explanation: A transformer operates on the principle of electromagnetic
induction to change voltage levels between circuits while maintaining
the same frequency. It does not convert AC to DC, store energy, or
increase power output, as power remains constant minus losses.
QUESTION 2
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Which type of insulator is most commonly used for high-voltage
transmission lines?
A) Pin insulator
B) Suspension insulator
C) Strain insulator
D) Shackle insulator
Answer: B
Explanation: Suspension insulators are preferred for high-voltage
transmission because they can be stacked in strings to achieve the
necessary creepage distance. They provide mechanical flexibility and
are less susceptible to contamination flashover compared to rigid pin
types.
QUESTION 3
What is the minimum approach distance for a journeyman lineman
working on energized lines rated at 345 kV?
A) 10 feet
B) 15 feet
C) 25 feet
D) 35 feet
Answer: C
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Explanation: OSHA 1910.269 and NESC tables establish minimum
approach distances based on voltage. For 345 kV, the typical minimum
approach distance is approximately 25 feet for phase-to-ground
exposure, considering transient overvoltage factors.
QUESTION 4
Which device is used to protect transmission lines from lightning
surges?
A) Fuse cutout
B) Lightning arrester
C) Recloser
D) Sectionalizer
Answer: B
Explanation: Lightning arresters provide a low-impedance path to
ground for surge currents, diverting lightning strikes away from
sensitive equipment. They are installed at substations and along lines to
limit overvoltages.
QUESTION 5
What is the standard frequency of AC power in North America?
A) 50 Hz
B) 60 Hz
C) 120 Hz
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D) 400 Hz
Answer: B
Explanation: North America operates at 60 Hz, whereas most of Europe
and Asia use 50 Hz. This frequency determines the synchronous speed of
motors and affects transformer design.
QUESTION 6
When installing a guy wire, what is the minimum recommended angle
from the pole to the ground?
A) 15 degrees
B) 30 degrees
C) 45 degrees
D) 60 degrees
Answer: C
Explanation: A 45-degree angle provides the optimal balance between
horizontal and vertical components of tension. Steeper angles reduce
mechanical advantage; shallower angles increase anchor loading.
QUESTION 7
What does the term "phasing" refer to in line work?
A) Connecting phases in correct sequence
POWER LINEMAN JOURNEYMAN Newest Exam
Preparation With Complete Questions And Correct
Answers With Rationales Already Graded A+ Brand
New Version!!
QUESTION 1
What is the primary purpose of a transformer in electrical power
distribution?
A) To convert AC to DC
B) To change voltage levels while maintaining frequency
C) To store electrical energy
D) To increase power output
Answer: B
Explanation: A transformer operates on the principle of electromagnetic
induction to change voltage levels between circuits while maintaining
the same frequency. It does not convert AC to DC, store energy, or
increase power output, as power remains constant minus losses.
QUESTION 2
,2|Page
Which type of insulator is most commonly used for high-voltage
transmission lines?
A) Pin insulator
B) Suspension insulator
C) Strain insulator
D) Shackle insulator
Answer: B
Explanation: Suspension insulators are preferred for high-voltage
transmission because they can be stacked in strings to achieve the
necessary creepage distance. They provide mechanical flexibility and
are less susceptible to contamination flashover compared to rigid pin
types.
QUESTION 3
What is the minimum approach distance for a journeyman lineman
working on energized lines rated at 345 kV?
A) 10 feet
B) 15 feet
C) 25 feet
D) 35 feet
Answer: C
,3|Page
Explanation: OSHA 1910.269 and NESC tables establish minimum
approach distances based on voltage. For 345 kV, the typical minimum
approach distance is approximately 25 feet for phase-to-ground
exposure, considering transient overvoltage factors.
QUESTION 4
Which device is used to protect transmission lines from lightning
surges?
A) Fuse cutout
B) Lightning arrester
C) Recloser
D) Sectionalizer
Answer: B
Explanation: Lightning arresters provide a low-impedance path to
ground for surge currents, diverting lightning strikes away from
sensitive equipment. They are installed at substations and along lines to
limit overvoltages.
QUESTION 5
What is the standard frequency of AC power in North America?
A) 50 Hz
B) 60 Hz
C) 120 Hz
, 4|Page
D) 400 Hz
Answer: B
Explanation: North America operates at 60 Hz, whereas most of Europe
and Asia use 50 Hz. This frequency determines the synchronous speed of
motors and affects transformer design.
QUESTION 6
When installing a guy wire, what is the minimum recommended angle
from the pole to the ground?
A) 15 degrees
B) 30 degrees
C) 45 degrees
D) 60 degrees
Answer: C
Explanation: A 45-degree angle provides the optimal balance between
horizontal and vertical components of tension. Steeper angles reduce
mechanical advantage; shallower angles increase anchor loading.
QUESTION 7
What does the term "phasing" refer to in line work?
A) Connecting phases in correct sequence
