2nd year Lineman Apprentice review (The
Guidebook for Linemen UPDATED
ACTUAL Exam Questions and CORRECT
Answers
What are 3 electrical clearances to be considered when designing a line? - CORRECT
ANSWER - 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? - CORRECT ANSWER - Electric, Gas,
Communications cable, Water, Sewer, Irrigation, Proposed excavation, Survey tape
Which wood pole has the larger diameter: class 1 or class 5? - CORRECT ANSWER - Class 1
What depth hole is needed in earth to set a 60ft pole? - CORRECT ANSWER - 8 Ft.
What measures are taken to avoid a pole or truck boom contact when setting a pole in an
energized circuit? - CORRECT ANSWER - 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? - CORRECT ANSWER - 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? -
CORRECT ANSWER - Size of the conductor, distance of the line to next dead-end
, Name 3 precautions needed to install a power installed screw anchor. - CORRECT
ANSWER -
What are three basic effects when an electric current flows in a conductor? - CORRECT
ANSWER - 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? - CORRECT ANSWER - Can carry
more current than it can on a hot day.
Which of the following characteristics of larger conductors are true? - CORRECT ANSWER -
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? - CORRECT
ANSWER - Conductor sag increases as load increases
Name two factors that influence the specification for the size of conductor needed - CORRECT
ANSWER - 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? - CORRECT ANSWER - Use of
corona rings or grading rings
Why is the DC rating of an underground cable 3 to for 4 times greater than AC rating? -
CORRECT ANSWER - the insulation will break down faster because of AC voltage stress vs
DC voltage stress
The voltage on an unloaded transformer is 120 V. What would the secondary voltage on an
unloaded transformer 2 miles downstream on a 1/0 conductor on a 4.8 kV circuit? - CORRECT
ANSWER - 113.5 volts
Guidebook for Linemen UPDATED
ACTUAL Exam Questions and CORRECT
Answers
What are 3 electrical clearances to be considered when designing a line? - CORRECT
ANSWER - 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? - CORRECT ANSWER - Electric, Gas,
Communications cable, Water, Sewer, Irrigation, Proposed excavation, Survey tape
Which wood pole has the larger diameter: class 1 or class 5? - CORRECT ANSWER - Class 1
What depth hole is needed in earth to set a 60ft pole? - CORRECT ANSWER - 8 Ft.
What measures are taken to avoid a pole or truck boom contact when setting a pole in an
energized circuit? - CORRECT ANSWER - 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? - CORRECT ANSWER - 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? -
CORRECT ANSWER - Size of the conductor, distance of the line to next dead-end
, Name 3 precautions needed to install a power installed screw anchor. - CORRECT
ANSWER -
What are three basic effects when an electric current flows in a conductor? - CORRECT
ANSWER - 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? - CORRECT ANSWER - Can carry
more current than it can on a hot day.
Which of the following characteristics of larger conductors are true? - CORRECT ANSWER -
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? - CORRECT
ANSWER - Conductor sag increases as load increases
Name two factors that influence the specification for the size of conductor needed - CORRECT
ANSWER - 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? - CORRECT ANSWER - Use of
corona rings or grading rings
Why is the DC rating of an underground cable 3 to for 4 times greater than AC rating? -
CORRECT ANSWER - the insulation will break down faster because of AC voltage stress vs
DC voltage stress
The voltage on an unloaded transformer is 120 V. What would the secondary voltage on an
unloaded transformer 2 miles downstream on a 1/0 conductor on a 4.8 kV circuit? - CORRECT
ANSWER - 113.5 volts
