Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
150 questions and answers related to the lineman apprentice test. It covers topics such as power factor, distribution systems, semiconductors, safety procedures, transformer polarity, electrical circuits, and more. This study guide is designed to help aspiring linemen prepare for their apprenticeship test by providing a comprehensive review of key concepts and practical knowledge required in the field. It includes questions on electrical theory, equipment, and safety regulations.
Typology: Exams
1 / 90
This page cannot be seen from the preview
Don't miss anything!
Your answers 1 of 154 Term The power factor is usually between 0.70-1.00 lagging. What is the average value often taken in making calculations? Give this one a try later! 0.95 0. 0.80 0. Don't know? 2 of 154 Term
What are the component parts of a distribution system? Give this one a try later! Substation, transmission towers, isolators, grounding systems, tertiary circuits, consumer units. Generation Station, transmission lines, transformers, switchyards, distribution panels, service drops. Power Plant, high-voltage cables, circuit breakers, metering equipment, secondary conductors, customer connections. Distribution Substation, feeder circuits, switches, protective equipment, primary circuits, distribution transformers, secondaries, services. Don't know? 3 of 154 Term N- Type semiconductor - ______ number of electrons. Give this one a try later! Balanced Neutral Excess Deficient
Subtractive Invertive Neutral Additive Don't know? 6 of 154 Term The first electric lights were called electric arc lamps and the first place they were installed was ____ _. Give this one a try later! New York, USA Berlin, Germany Paris, France London, England Don't know? 7 of 154 Term The size of a crew needed to pike a 30 ft pole is _______, 35 ft _______, 40 ft _______, 45 and 50 ft _______
Give this one a try later! 6 (30 ft), 7 (35 ft), 8 (40 ft), 10 (45 &50 ft) 0 - 6 ft less than 40' 6 - 12 ft over 40' 1.66 (this means that aluminum is only 2/3 as conductive as copper) 27,000 lbs/sq in (The strength of alum is only about 1/2 that of hard drawn copper) Don't know? 8 of 154 Term What size tie wire should be sued to tie in conductors that are #4 and smaller, 1/0 to #4, larger than 1/0? Give this one a try later! #8, #6, #4 (tie wire should be hard drawn) #6, #4, #2 (tie wire should be soft drawn) #4, #2, 1/0 (tie wire should be soft drawn) #6, #4, #2 (tie wire should be annealed) Don't know? 9 of 154
11 of 154 Term If one transformer of a closed delta bank is removed during an outage to restore service, the remaining two can handle ______% of the original capacity. Give this one a try later! 58% 65% 75% 40% Don't know? 12 of 154 Term 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? Give this one a try later! Overheating due to external temperature, it's designed for high Resistance in the fuse itself, it's designed to hold a certain
heat. amount of current for a predetermined amount of time. Corrosion in the fuse material, it's designed to withstand moisture. Mechanical stress in the fuse, it's designed to flex under pressure. Don't know? 13 of 154 Term What is the breaking strength of 5/16 utility grade guy wire? Give this one a try later! 6,000 lbs 8,000 lbs 4,000 lbs 10,000 lbs Don't know? 14 of 154 Term Overhead secondary mains are usually installed on __________ ____________ and bolted to the pole.
16 of 154 Term The usual generation voltage of a generation station (power plant) is _________ to _____ _. Give this one a try later! 5,000 volts - 10,000 volts, also 12, volts 20,000 volts - 30,000 volts, also 35,000 volts 10,000 volts - 15,000 volts, also 18, volts 13,200 volts - 25,000 volts, also 24,000 volts Don't know? 17 of 154 Term 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. Give this one a try later! 2.5% 1%
5% 10% Don't know? 18 of 154 Term 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. Give this one a try later! 25 ohms or less 30 ohms or less 10 ohms or less 50 ohms or less Don't know?
Carrier Equipment Metallic Thermostat Don't know? 21 of 154 Term A swiss engineer named _____________ developed a high voltage DC transmission system in ____ _. Give this one a try later! Edison, 1905 Bell, 1910 Thury, 1899 Tesla, 1885 Don't know? 22 of 154 Term When tying knots, the part of the rope that is looped so that the ropes lie alongside each other is called what? Give this one a try later!
Bend Splice Snub Bight Don't know? 23 of 154 Term The Maximum use voltage for class 3 gloves is _____ volts Give this one a try later! 20,000 volts 15,000 volts 26,500 volts 30,000 volts Don't know?
It would have no effect on the customer. It would cause a short circuit in the system. Don't know? 26 of 154 Term XLPE=______ Give this one a try later! Coated polyethylene Compressed polyethylene Chemically linked polyethylene Cross linked polyethylene Don't know? 27 of 154 Term Why is it necessary to insulate a guy? Give this one a try later!
Commutator (the process is called commutation) Distribution Substation, feeder circuits, switches, protective equipment, primary circuits, distribution transformers, secondaries, services. When guys are exposed to voltages over 300 volts or when guys are on poles with unprotected conductors over 300 volts and the guy is not grounded. If the wires to be connected are not under tension Don't know? 28 of 154 Term The semiconductor blocks in a lightening arrestor are made using what type of material? Give this one a try later! Diode Zinc Oxide Material Additive High Or Tansmission Don't know?
Don't know? 31 of 154 Term To change the value of a secondary voltage, a no load tap changer on the transformer would be adjusted while the transformer is energized. (True or False) Give this one a try later! False 3 to 5 Paris, France True Don't know? 32 of 154 Term An advantage of a Wye Primary system over a Delta primary system is? Give this one a try later!
Enhanced system stability, smaller conductor size Lower installation costs, decreased maintenance Increased power carrying capacity, better voltage regulation Reduced power loss, simpler system design Don't know? 33 of 154 Term In the United States & Canada A/C power is generated at _______ Hz (hertz or frequency) Give this one a try later! 60 Hz 40 Hz 75 Hz 50 Hz Don't know? 34 of 154 Term
