Lineman Apprentice 163 Test Success Strategies: Key Questions for Exam Excellence Success Simplified: Clear Answers for Confident Studying
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________ ________ provides high frequency voltages to be used for transmitting voice communication or telemetering signals on high voltage transmission circuits. - ️️Carrier Equipment
________ are used to protect the electrical system from faults in such equipment as potential transformers or ...
Lineman Apprentice 163 Test Success
Strategies: Key Questions for Exam
Excellence
________ ________ provides high frequency voltages to be used for transmitting voice communication
or telemetering signals on high voltage transmission circuits. - ✔ ✔ Carrier Equipment
________ are used to protect the electrical system from faults in such equipment as potential
transformers or power transformers. - ✔ ✔ High voltage fuses
________ originate in distribution substations and include the conductors and equipment necessary to
distribute electricity to the customer. - ✔ ✔ Distribution circuits
__________ reduces the tensile strength of wires. - ✔ ✔ Annealing
____________ designed and buried a transmission system using copper rods insulated with jute. - ✔
✔ Thomas Edison
1 KW is equal to about ________ hp. - ✔ ✔ one and 1/3 or 1.33
A _____ ft mast arm is used in alleys, a ________ ft mast arm is used in residential areas w/ streets less
than 40 ft wide, a _____ ft is used where streets are more than 40 ft wide and in industrial/ commercial
areas? - ✔ ✔ 3 ft alleys
6 ft residential <40 ft
12 ft industrial >40 ft
A ________ can be used in a circuit to amplify a signal. - ✔ ✔ Transistor
A _________ semiconductor can be used as a current rectifier. - ✔ ✔ Diode
A fuse link is generally made from one of the following:
silver, tin, lead, copper or an alloy such as tin-lead. What causes it to melt or blow? - ✔ ✔ Resistance
in the fuse itself, it's designed to hold a certain amount of current for a predetermined amount of time.
A ground rod that penetrates perpetually moist earth will have a fairly ________ resistance. - ✔ ✔
Low
A light should be located from _____ to _____ ft over the surface of a road, less than 40' wide and from
______ to ______ ft on roads more than 40' wide. - ✔ ✔ 0-6 ft less than 40'
, 6-12 ft over 40'
A recloser can operate a predetermined number of times _________ to ________ and "locks out". - ✔
✔ 1 to 4
A swiss engineer named _____________ developed a high voltage DC transmission system in
_____________. - ✔ ✔ Thury, 1899
A three phase transmission system requires only ______ the total weight of conductor required for a
single or two phase system. - ✔ ✔ 3/4
A wire tong is used to ____________. - ✔ ✔ Hold energized wire away from work area
After driving a ground rod you should check the resistance with an ohm meter. If the resistance is not
below _________ ohms, one should be added on top or another rod should be driven beside the
existing one. - ✔ ✔ 25 ohms or less
Aluminum compares to copper in the following manner: it is 2/3 as conductive as copper. Compared
with a copper wire of the same physical size, alum wire has 60% of the conductivity, 45% of the tensile
strength, and 33% of the weight.
Alum must be 1.66 times as large as copper to have the same conductivity.
An alum wire with the same conductivity as copper will have 75% the strength an 55% the weight of
copper.
The tensile strength of alum is only about 1/2 that of hard drawn copper. - ✔ ✔
Alumoweld guy cable, seven-strand #8 has a minimum breaking strength of _______ & #% has a
breaking strength of _________. - ✔ ✔ #8 - 15,930
#5 - 27,030
An ___________ ______________ when used for service entrance protection and coordination, the
electric fuses provide a buffer to prevent in-plant problems on the customer system from affecting
service on the utility company system. - ✔ ✔ electronic fuse
An advantage of a Wye Primary system over a Delta primary system is? - ✔ ✔ Increased power
carrying capacity, better voltage regulation
An aluminum wire must be ________ times as big as copper is a cross section to have the same
conductivity. - ✔ ✔ 1.66 (this means that aluminum is only 2/3 as conductive as copper)
An insulator made from synthetic material such as silica or fiberglass weighs what percentage of the
insulators they replace? - ✔ ✔ 5-10%
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