Lineman Apprentice review questions with
verified answers
What are 3 electrical clearances to be considered when designing a line? Ans✔✔-
1.) Clearances from the ground, buildings, highways, railways, other circuits, and
comm cables. 2.) Standards for minimum clearances between phases, energized
parts, the structure and down guys. 3.) Standards for clearances to allow safer
work
Before digging, what other utilities should be located? Ans✔✔-Electric, Gas,
Communications cable, Water, Sewer, Irrigation, Proposed excavation, Survey
tape
Which wood pole has the larger diameter: class 1 or class 5? Ans✔✔-Class 1
What depth hole is needed in earth to set a 60ft pole? Ans✔✔-8 Ft.
What measures are taken to avoid a pole or truck boom contact when setting a
pole in an energized circuit? Ans✔✔-Use equipment and procedures necessary to
prevent pole and equipment from making accidental contact. Use safety controls
to reduce risk of injury if contact is made
What measures are taken to prevent injury to workers on the ground in case a
pole or truck boom contact an energized circuit? Ans✔✔-Ground the digger
derrick, have the circuit breaker or recloser put in non-reclose position to ensure
circuit remains isolated. Person controlling butt of the pole should always be
wearing rubbers
, What 2 factors determine the size or number of guys and anchors needed to hold
a pole? Ans✔✔-Size of the conductor, distance of the line to next dead-end
Name 3 precautions needed to install a power installed screw anchor. Ans✔✔-
What are three basic effects when an electric current flows in a conductor?
Ans✔✔-A magnetic field is set up around the conductor, heat is generated to
some extent, and a drop in voltage occurs to some extent.
Why is the ampacity of a conductor higher in Winter? Ans✔✔-Can carry more
current than it can on a hot day.
Which of the following characteristics of larger conductors are true? Ans✔✔-
1)There is a greater potential for ice buildup.
2)There is less heat buildup for a given load.
3) wind will have a greater effect on the conductor
How does the sag in a transmission line span affect the ampacity of a conductor?
Ans✔✔-Conductor sag increases as load increases
Name two factors that influence the specification for the size of conductor
needed Ans✔✔-Conductor must be large enough to keep voltage drop to an
acceptable limit, conductor must be large enough for future load growth
How is corona loss minimized on a transmission line? Ans✔✔-Use of corona rings
or grading rings
verified answers
What are 3 electrical clearances to be considered when designing a line? Ans✔✔-
1.) Clearances from the ground, buildings, highways, railways, other circuits, and
comm cables. 2.) Standards for minimum clearances between phases, energized
parts, the structure and down guys. 3.) Standards for clearances to allow safer
work
Before digging, what other utilities should be located? Ans✔✔-Electric, Gas,
Communications cable, Water, Sewer, Irrigation, Proposed excavation, Survey
tape
Which wood pole has the larger diameter: class 1 or class 5? Ans✔✔-Class 1
What depth hole is needed in earth to set a 60ft pole? Ans✔✔-8 Ft.
What measures are taken to avoid a pole or truck boom contact when setting a
pole in an energized circuit? Ans✔✔-Use equipment and procedures necessary to
prevent pole and equipment from making accidental contact. Use safety controls
to reduce risk of injury if contact is made
What measures are taken to prevent injury to workers on the ground in case a
pole or truck boom contact an energized circuit? Ans✔✔-Ground the digger
derrick, have the circuit breaker or recloser put in non-reclose position to ensure
circuit remains isolated. Person controlling butt of the pole should always be
wearing rubbers
, What 2 factors determine the size or number of guys and anchors needed to hold
a pole? Ans✔✔-Size of the conductor, distance of the line to next dead-end
Name 3 precautions needed to install a power installed screw anchor. Ans✔✔-
What are three basic effects when an electric current flows in a conductor?
Ans✔✔-A magnetic field is set up around the conductor, heat is generated to
some extent, and a drop in voltage occurs to some extent.
Why is the ampacity of a conductor higher in Winter? Ans✔✔-Can carry more
current than it can on a hot day.
Which of the following characteristics of larger conductors are true? Ans✔✔-
1)There is a greater potential for ice buildup.
2)There is less heat buildup for a given load.
3) wind will have a greater effect on the conductor
How does the sag in a transmission line span affect the ampacity of a conductor?
Ans✔✔-Conductor sag increases as load increases
Name two factors that influence the specification for the size of conductor
needed Ans✔✔-Conductor must be large enough to keep voltage drop to an
acceptable limit, conductor must be large enough for future load growth
How is corona loss minimized on a transmission line? Ans✔✔-Use of corona rings
or grading rings
