LINEMAN APPRENTICE QUESTIONS AND SOLUTIONS
GRADED A+
✔✔________ are used to protect the electrical system from faults in such equipment as
potential transformers or power transformers. - ✔✔High voltage fuses
✔✔What is the standard polarity of a 14.4 transformer that is less than 200 kVA? -
✔✔Subtractive
✔✔Explain the properties that describe a good insulator. - ✔✔An object with few free
electrons
✔✔A recloser can operate a predetermined number of times _________ to ________
and "locks out". - ✔✔1 to 4
✔✔The lengths of sag sections are limited by deadends, angle structures, and terrain.
What is the max length of a sag section? - ✔✔4.5 miles (weather conditions including
temp and wind velocity must be taken into consideration during this procees. Also,
dynamometers can be used to check line tension).
✔✔Secondary terminals on a transformer in order X3, X2, X1 from left to right is
________ polarity. - ✔✔Additive
✔✔The standard taps available are on the primary winding of the transformer and are
designed to provide variations in the number of windings turns in steps of ____% of the
rated voltage. - ✔✔2.5%
✔✔Voltages over _____ volts are classified as experimental voltages. - ✔✔1 million
✔✔What size tie wire should be sued to tie in conductors that are #4 and smaller, 1/0 to
#4, larger than 1/0? - ✔✔#6, #4, #2 (tie wire should be soft drawn)
✔✔What are the five classes of rubber goods? - ✔✔0-4
✔✔The 5 steps to guy installation are: - ✔✔Install the anchor, insert strain insulator or
ground guy or both, fasten to pole, tighten guy wire and connect to anchor, mount the
guy wire guard.
✔✔When tying knots, the part of the rope that is looped so that the ropes lie alongside
each other is called what? - ✔✔Bight
✔✔Wire insulation is generally made of these 3 materials ________, __________,
_________. - ✔✔Rubber, polyethylene, polyvinylchloride
, ✔✔True or False - Arresters contain semiconductor blocks or discs that allow large
currents to pass harmlessly to ground. - ✔✔True
✔✔Feeders generally operate from ________ to ________. - ✔✔2400 volts - 34,500
volts
✔✔Subtransmission sunstations generate at a range of _________ to _________ and
are located close to __________. - ✔✔34.5 kV-69 kV, High load (urban areas)
✔✔DC circuits usually consist of ________ wires. - ✔✔2 wires
✔✔The usual generation voltage of a generation station (power plant) is _________ to
_________. - ✔✔13,200 volts - 25,000 volts, also 24,000 volts
✔✔The breaker in a substation is installed between the __________ & the
___________. - ✔✔Low voltage bus (distribution feeder voltage) & the distribution
feeder circuit.
✔✔True or False - Cold flow is a term used to describe load encountered when you first
energize a line. - ✔✔False
✔✔A ________ can be used in a circuit to amplify a signal. - ✔✔Transistor
✔✔More power can be drawn from a transformer during the winter because the ambient
temperature is lower. - ✔✔
✔✔The basic understanding of electricity is called what? - ✔✔Electron Theory
✔✔Power factor = ?/?x? - ✔✔Watts/Volts x Amps
✔✔Secondary terminals on a transformer in order X3, X2, X1 from left to right is
________ polarity. - ✔✔Additive
✔✔Circuit Breaker - Some high voltage circuit breakers utilize compressed air to
operate and interrupt circuit flow when contacts open. Operation is initiated by utilizing
DC circuits, manually operating a switch, by remote supervisory controls or by relays
that auto sense predetermined electrical faults. - ✔✔
✔✔Tensile strength of aluminum is ________ lb/in2 (lbs a sq in) - ✔✔27,000 lbs/sq in
(The strength of alum is only about 1/2 that of hard drawn copper)
GRADED A+
✔✔________ are used to protect the electrical system from faults in such equipment as
potential transformers or power transformers. - ✔✔High voltage fuses
✔✔What is the standard polarity of a 14.4 transformer that is less than 200 kVA? -
✔✔Subtractive
✔✔Explain the properties that describe a good insulator. - ✔✔An object with few free
electrons
✔✔A recloser can operate a predetermined number of times _________ to ________
and "locks out". - ✔✔1 to 4
✔✔The lengths of sag sections are limited by deadends, angle structures, and terrain.
What is the max length of a sag section? - ✔✔4.5 miles (weather conditions including
temp and wind velocity must be taken into consideration during this procees. Also,
dynamometers can be used to check line tension).
✔✔Secondary terminals on a transformer in order X3, X2, X1 from left to right is
________ polarity. - ✔✔Additive
✔✔The standard taps available are on the primary winding of the transformer and are
designed to provide variations in the number of windings turns in steps of ____% of the
rated voltage. - ✔✔2.5%
✔✔Voltages over _____ volts are classified as experimental voltages. - ✔✔1 million
✔✔What size tie wire should be sued to tie in conductors that are #4 and smaller, 1/0 to
#4, larger than 1/0? - ✔✔#6, #4, #2 (tie wire should be soft drawn)
✔✔What are the five classes of rubber goods? - ✔✔0-4
✔✔The 5 steps to guy installation are: - ✔✔Install the anchor, insert strain insulator or
ground guy or both, fasten to pole, tighten guy wire and connect to anchor, mount the
guy wire guard.
✔✔When tying knots, the part of the rope that is looped so that the ropes lie alongside
each other is called what? - ✔✔Bight
✔✔Wire insulation is generally made of these 3 materials ________, __________,
_________. - ✔✔Rubber, polyethylene, polyvinylchloride
, ✔✔True or False - Arresters contain semiconductor blocks or discs that allow large
currents to pass harmlessly to ground. - ✔✔True
✔✔Feeders generally operate from ________ to ________. - ✔✔2400 volts - 34,500
volts
✔✔Subtransmission sunstations generate at a range of _________ to _________ and
are located close to __________. - ✔✔34.5 kV-69 kV, High load (urban areas)
✔✔DC circuits usually consist of ________ wires. - ✔✔2 wires
✔✔The usual generation voltage of a generation station (power plant) is _________ to
_________. - ✔✔13,200 volts - 25,000 volts, also 24,000 volts
✔✔The breaker in a substation is installed between the __________ & the
___________. - ✔✔Low voltage bus (distribution feeder voltage) & the distribution
feeder circuit.
✔✔True or False - Cold flow is a term used to describe load encountered when you first
energize a line. - ✔✔False
✔✔A ________ can be used in a circuit to amplify a signal. - ✔✔Transistor
✔✔More power can be drawn from a transformer during the winter because the ambient
temperature is lower. - ✔✔
✔✔The basic understanding of electricity is called what? - ✔✔Electron Theory
✔✔Power factor = ?/?x? - ✔✔Watts/Volts x Amps
✔✔Secondary terminals on a transformer in order X3, X2, X1 from left to right is
________ polarity. - ✔✔Additive
✔✔Circuit Breaker - Some high voltage circuit breakers utilize compressed air to
operate and interrupt circuit flow when contacts open. Operation is initiated by utilizing
DC circuits, manually operating a switch, by remote supervisory controls or by relays
that auto sense predetermined electrical faults. - ✔✔
✔✔Tensile strength of aluminum is ________ lb/in2 (lbs a sq in) - ✔✔27,000 lbs/sq in
(The strength of alum is only about 1/2 that of hard drawn copper)
