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LINEMAN APPRENTICE PROGRAM THE GUIDEBOOK FOR LINEMEN CABLEME 2ND EDITION QUESTIONS AND ANSWERS
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LINEMAN APPRENTICE PROGRAM THE GUIDEBOOK FOR LINEMEN CABLEME 2ND EDITION QUESTIONS AND ANSWERS...
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LINEMAN APPRENTICE PROGRAM THE GUIDEBOOK FORLINEMEN CABLEME 2ND EDITION QUESTIONS AND
ANSWERS
What are 3 electrical clearances to be considered when designing a line? -
ANSWER 1.) Clearances from the ground, buildings, highways, railways, other
circuits and comms cables. 2.) Minimum clearance standards between phases,
energized parts and the structure and down guys. 3.) Standards for clearances to
allow safer work
Which utilities should be located before digging? - ANSWER Electric, Gas,
Communications cable, Water, Sewer, Irrigation, Proposed excavation, Survey
tape
Which wood pole has the bigger diameter: class 1 or class 5? - ANSWER
Class 1
What depth hole is needed in earth to set a 60ft pole? - ANSWER 8 Ft.
What safety precautions are employed to prevent a pole or a truck boom contact
when setting a pole in or near an energized circuit? - ANSWER The workmen
use equipment and procedures that will prevent the pole and/or equipment from
coming into accidental contact. Safety controls are used that will minimize
injury in case contact is made
What precautions are taken to prevent injury to workers on the ground in case a
pole or truck boom contact an energized circuit? - 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? - ANSWER Size of the conductor, distance of the line to next dead-end
Name 3 precautions needed to install a power installed screw anchor. -
ANSWER
What three basic effects are produced when an electric current flows in a
conductor? - ANSWER There are set up around the conductor a magnetic
field, to some extent heat is generated, and there is a drop in voltage to some
extent.
Winter, the ampacity of a conductor is - ANSWER higher, it can carry more
current than it can on a hot day.
Which of the following are characteristics of larger conductors? - ANSWER
1)There is more chance of ice forming.
2)There is less heat generated for any 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? - ANSWER Conductor sag increases as load increases
Name two factors that influence the specification for the size of conductor
needed - ANSWER Conductor must be large enough to keep voltage drop to
an acceptable limit, conductor must be large enough for future load growth
How does one minimize corona loss on a transmission line? - ANSWER Use
of corona rings or grading rings
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