The Lineman's and Cableman's Handbook Chapter 4 |Study Smart: 51 Curated Questions for Exam Success Correctly Answers
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Course
The Lineman\\\'s and Cableman\\\'s Handbook
Institution
The Lineman\\\'s And Cableman\\\'s Handbook
____ are installed on the system to detect low oil pressure. - ️️alarms
____ transmission circuits have been installed in large metropolitan areas and other places where overhead transmission lines are not practical - ️️underground
_____ levels of AC transmission circuits range from 34,50...
The Lineman's and Cableman's
Handbook Chapter 4 |Study Smart: 51
Curated Questions for Exam Success
____ are installed on the system to detect low oil pressure. - ✔ ✔ alarms
____ transmission circuits have been installed in large metropolitan areas and other places where
overhead transmission lines are not practical - ✔ ✔ underground
_____ levels of AC transmission circuits range from 34,500 to 765,000 volts - ✔ ✔ voltage
a 2000-volt AC transmission line was constructed in ____ in 1886 - ✔ ✔ italy
a thin ______ polyethylene shield is extruded over the insulation - ✔ ✔ semi-conducting
a three-phase AC line operating at 345,000 volts, for example, can carry _____ times as much power as a
138,000 volt line - ✔ ✔ 6.25
all ____ buildings or structures should be grounded, whether they are built near a transmission right of
way or not. - ✔ ✔ metal
circuits with voltages in the range of 34,500 to 161,000 volts have been converted to _____ use - ✔ ✔
subtransmission
compressed-gas-insulated or gas ____ cables using sulfur hexafluoride (SF6) gas as the insulating
medium are used for high-capacity insulated transmission circuits - ✔ ✔ spacer
corona and resulting radio-interference _______ and audible noise can be controlled with proper
transmission line design and precautions - ✔ ✔ voltages
DC transmission lines can consist of one conductor with a ground return, called a _____ system, or two-
conductor transmission lines with a ground return, called a ____ system - ✔ ✔ mono-polar bi-polar
electric field _____ of transmission lines are not hazardous - ✔ ✔ effects
Experimental transmission lines have been built and tested to operate at voltages in the range of 1,100
to ____ KW - ✔ ✔ 1,500
high-pressure oil-filled (HPOF) ____-insulated cables in which the three phase conductors are enclosed
in a steel pipe containing oil are also used for underground cable transmission circuits - ✔ ✔ paper
high-voltage transmission lines can cause disturbances or interferences in communications lines by
induction & may require transposition of the power conductors. this adds to the communications circuit
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