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APPRENTICE LINEMAN YEAR 3 EXAM
QUESTIONS AND ANSWERS
Select the three common types of URD Systems - Correct Answers - Double Feed, Radial Feed, and Loop Feed True or False: A URD system is usually connected to the overhead primary distribution lines at a cable or riser pole. - Correct Answers - True True or False: Customers using three-phase equipment on a URD system must be powered by a set of three-phase conductors separate from the rest of the URD. - Correct Answers - False True or False: A loop feed system can be converted into an open loop system by opening any switching point of the system. - Correct Answers - True True or False: An open loop system is the same as two radial feed systems that have the capability to be joined. - Correct Answers - True A _____________ protects a URD system from over-voltages. - Correct Answers - Surge Arrestor A pad-mounted switch that connects a URD system to an underground feeder cable is called a - Correct Answers - Transclosure Select the types of equipment often found on cable poles. - Correct Answers - Surge protectors, pothead, disconnect switches, and fuses. True or False: Dead-front transformers are fully insulated and can be switched by a lineman using rubber gloves. - Correct Answers - False Select the three types of transformer installations in URD systems. - Correct Answers - Direct-buried, pad-mounted, subsurface. True or False: Tap holes are used to energize and de-energize transformers - Correct Answers - False True or False: URD cable is often made of softer alloys then overhead cable. - Correct Answers - True
One a large customer of three-phase power is associated with a URD system, the system may be fed directly from a ___________ through an underground feeder. - Correct Answers - Substation What are the functions of a pothead? - Correct Answers - Terminate the URD cable insulation, Provide the connection between overhead cable and URD cable True or False: URD cable can be installed in the same trench with other types of cable and utilities. - Correct Answers - True When a URD cable must go under a building, a parking lot, or a street, it is often installed in _________ to make replacing the cable easier. - Correct Answers - Conduit Before opening a pad-mounted transformer, a Lineman should perform a __________ to make sure all equipment appears safe. - Correct Answers - Visual Inspection True or False: during a transformer inspection, a lineman uses a system diagram to tag all unmarked cables. - Correct Answers - False True or False: at a pad-mounted switch, a lineman checks the position of each switch against the system diagram and returns each switch to the correct position. - Correct Answers - False __________ allow several different cables to be connected at one point. - Correct Answers - Terminal Strips Which of the following can be a valuable source of information during troubleshooting? - Correct Answers - The troubleman's experience, customers and eyewitnesses, and a dispatcher True or False: if only one customer loses power, while other surrounding customers have normal service, troubleshooting should begin by checking the main feeder. - Correct Answers - False Which of the following is NOT a method of locating a problem? - Correct Answers - Documenting True or False: troubleshooting ends as soon as a problem is located. - Correct Answers
- False True or False: patrolling is scheduled only when specific problems have been reported on a line. - Correct Answers - False A Troubleman should always treat lines and equipment as if they are _____________. - Correct Answers - Energized
When viewed from the secondary side of a transformer, the primary bushing on the left- hand side is designated as - Correct Answers - H On additive polarity transformers, the secondary bushing on the right hand side of the unit is designated as - Correct Answers - X A ______________ is a type of variable ratio transformer that is designed to respond to voltage changes above or below a predetermined level. - Correct Answers - Voltage Regulator A voltage regulator adjusts voltage on the _____ side of the regulator so that it remains within acceptable limits - Correct Answers - Load A(n) ________ regulator adjusts voltage in a continuous fashion, while a ______ regulator adjusts voltage in a number of defined stages - Correct Answers - Induction, step True or False: when a transformer is fully loaded, it can supply it's rated output voltage, plus its percent impedance - Correct Answers - False A transformer that can be energized by two different primary voltages, depending on the position of a switch, is generally known as a ____________ transformer - Correct Answers - Dual-Voltage In most cases, when transformers are connected together to form a three-phase bank, which of the following should be closely match or identical - Correct Answers - Percent impedance, voltage rating, KVA rating The nameplate of a unit gives the following voltage rating: 7620/13200Y. When the unit is properly energized, how many volts will be applied to the primary winding? - Correct Answers - 7, Select the conditions that must be met in order to use three single-phase transformers to build a three-phase bank. - Correct Answers - Voltage ratings must be identical and compatible with the primary system, dual-voltage switches or tap-changing mechanisms should be in identical positions, percent impedances should be similar, KVA ratings should be similar. True or False: a primary three-phase delta connection can be made using either single- bushing or two-bushing transformers - Correct Answers - False When the case grounds or the "H2" bushings on a transformer bank are joined together and connected to a system neutral, the connection is often referred to as a - Correct Answers - Wye-tie
Using the following phaser diagram as a Reference, choose the letter next to the corresponding diagram that shows the three single-phase transformers connected in a delta primary connection - Correct Answers - A Using the following phaser diagram as a reference, choose the letter next to the corresponding diagram that shows three single-phase transformer is connected in a wye primary connection - Correct Answers - B On a three-phase wye-wye connected bank, connections between any secondary line and the grounded system neutral will supply - Correct Answers - 120 volts True or False: Wye-delta connections, like other three-phase connections, are made using single-phase transformers - Correct Answers - True Below is a simplified illustration of three single-phase two-bushing additive transformers, wye-delta phasor diagrams, and primary and secondary distribution lines. Choose a letter next to the diagram that shows the proper connections between the transformers, and to the distribution systems according to the phasor diagrams to form a straight power bank. - Correct Answers - B Wye-delta connections - Correct Answers - Are affected by unbalanced loads and faults to a greater extent than other three-phase connections, may use a floating wye-tie if procedures call for it True or False: the wye-delta connection, illustrated by the phaser diagrams shown below, uses a floating wye-tie on the primary side of the bank - Correct Answers - False In delta-delta connection with 0° of angular displacement, a phase relationship is established between the "H1" end of each primary winding, and the ________ end of each secondary winding - Correct Answers - X True or False: the principal difference between a closed three-phase bank and an open three-phase bank are the number of transformers required to supply three-phase power and the capacity of the bank - Correct Answers - True If it is necessary to open a closed three-phase bank - Correct Answers - The secondary load on the system may have to be reduced, specific company procedures and safe work practices must be followed True or False: the connections between the windings of a three-phase transformer can easily be changed to accommodate whatever system the transformer is used on - Correct Answers - False Which of the following are methods of identifying a circuit? - Correct Answers -?
Which of the following are conditions that affect the type of shoring used on a job? - Correct Answers - Type of soil, specific company, requirements, water content of the soil, weather conditions, placement of heavy materials and equipment True or False: an atmospheric test device should be calibrated at the job site with the probe in fresh air - Correct Answers - True True or false: when the combustibles scale on the atmospheric tester reads 30%, it means that the combustible gas is 30% of the air by volume - Correct Answers - False In an emergency, a lineworker must know how to take immediate action to help an accident ________ without becoming a victim - Correct Answers - Victim Which of the following should be included when reporting an emergency? - Correct Answers - The exact location, the circuit number, the nature of the situation True or False: an individual who responds to a vault emergency should check the atmosphere in the vault before entering the vault. - Correct Answers - True True or False: the first thing that must be done when an accident resulting in an emergency happens is that the emergency must be called in by radio or telephone so that help can be dispatched - Correct Answers - True Choose the two methods commonly used to work on primary distribution lines while they are energized. - Correct Answers - Rubber gloves and hot sticks True or False: The purpose of rubber protective gear is to provide a barrier between linemen and energized equipment. - Correct Answers - True Safely working on energized distribution lines requires - Correct Answers - Maintaining and inspecting the equipment used and using the proper class of protective gear True or False: rubber blankets can be used to safely insulate linemen from many different kinds of energized equipment. - Correct Answers - True Personal protective gear is worn by ___________ to provide insulation from contact with energized equipment. ________ protective gear is installed on energized equipment to provide an insulating barrier against accidental contact. - Correct Answers
- Personnel, line True or False: since rubber stretches, properly fitted rubber gloves should be slightly smaller than the lineman's hands so that they will not slip when he picks up objects. - Correct Answers - False Leather glove covers should be - Correct Answers - One inch shorter than the rubber gloves for each 10 kilovolts of rated voltage.
True or False: rubber protective gear is made of natural rubber. - Correct Answers - True Match each type of rubber gear damage listed in the left-hand column with the appropriate cause from the right-hand column. - Correct Answers - Area of swelling: contact with oil patches of random cracks: sunlight or ozone patches of parallel cracks: folding punctures: wood splinters True or False: rubber gear that has been dielectrically tested does not have to be inspected in the field. - Correct Answers - False dirt or contamination on protective gear will often cause ________ to ________ across the surface of the protective gear. - Correct Answers - Current, track True or False: personal protective gear, such as rubber gloves and sleeves, should be stored either in its own protective bag or in a special compartment in the truck. - Correct Answers - False When rubber gloves are inspected, special attention is given to the ______ and to the areas between the ________ since these areas normally get the most wear. - Correct Answers - Palms, fingers After each rubber glove is visually inspected, is is _______ to check for punctures and cuts. - Correct Answers - Inflated True or False: when a blanket is inspected, it is usually a good idea to roll it from more than one side, since cracks can form in the rubber in any direction. - Correct Answers - True Select the two general types of dielectric tests given to rubber protective gear. - Correct Answers - Current leakage, pass or fail Before a crew begins the first glove job of the day on energized primary distribution line from a bucket truck, - Correct Answers - Personal and line protective gear should be visually inspected, the bucket truck should be cleaned and inspected, a tailgate session should be held to plan the job. True or False: line cover gear is installed from the top down so that linemen do not have to work underneath energized equipment. - Correct Answers - False True or False: even when wearing rubber gloves and sleeves, a lineman should never lean against covered energized equipment or touch more than one phase at a time. - Correct Answers - True
True or False: there is no need to electrically ground the pulling rig since the pulling rope is no conductive - Correct Answers - False Keeping customers energized while transferring load on a three transformer bank requires jumpers to be placed in ______ positions - Correct Answers - Parallel OSHA regulations state that if intentional or accidental contact can be made with energized wires or equipment, the wires or equipment should be - Correct Answers - Covered True or False: OSHA regulations state that protective grounding shall be capable of withstanding the maximum voltage that could clear a fault - Correct Answers - False When moving dead ends to the temporary arms, _______ ______ may be needed to allow for additional clearance - Correct Answers - Temporary jumpers After the new conductors are energized and load transferred, the old conductors should be isolated by - Correct Answers - Disconnecting the temporary jumpers An arm that extends out from only one side of a pole is called a(n): - Correct Answers - Alley arm ________ _______ are rollers that ropes and conductors travel through as they are being pulled in - Correct Answers - Stringing dollies Which of the following is NOT a basic task generally associated with distribution line installation and removal - Correct Answers - Drawing a series of construction prints True or False: the type of pulling unit used on a distribution line installation and removal job will depend on the size of the tensioner - Correct Answers - False A __________ create resistance on a rope or conductor, to keep it from sagging while a ___________ pulls a rope and a conductor through - Correct Answers - Tensioner, puller When a pole is set between energized circuits, the phase that the pool sits between should be - Correct Answers - Covered with high-voltage cover gear and moved out of the work area True or False: if intentional or accidental contact can be made with energized wires or equipment, the wires or equipment should be covered - Correct Answers - True Select two basic methods of protecting crew members in case contact is made with an energize conductor - Correct Answers - Insulating and isolating, grounding
True or False: before a new line is energized, all grounds should be removed - Correct Answers - True When the feet of a lateral line is changed, the line is _________ at a new location, and ____________ from the original location - Correct Answers - Energized, disconnected The attachment used to mount the stringing blocks in the video demonstration was - Correct Answers - Standard crossarm mount bracket True or False: reconstruction of an existing pole may include installing new components
- Correct Answers - True In the video presentation, the frame of the truck was grounded, by connecting one end of a ground clamp to the ____________ and clamping the other end to the __________ wire - Correct Answers - Truck, system neutral In the video presentation, ____________ was used to assist in lowering conductors. - Correct Answers - An arm gin Select the steps for installing a new distribution line in the proper sequence - Correct Answers - 1. Setting up the puller and the tensioner
- pulling in the pilot line, the bull rope, and the conductors
- Dead-ending and sagging the conductors
- tying in the conductors In the video demonstration, the bull rope reel was mounted on the ________ and the conductor reel was mounted on the _________ - Correct Answers - Puller, tensioner True or False: final SAG, is the SAG of a conductor, after a predetermined period of time has elapsed - Correct Answers - True The jumper connections shown on drawings or construction prints should be verified by using a _________ - Correct Answers - Phasing tool Select the four basic tasks involved in phasing-in a new line (tasks do not have to be in order) - Correct Answers - Retesting the phasing tool, testing the phasing tool, finding the zero indication between the circuits, proving that the circuits are energized at the same voltage True or False: a zero or near zero indication on the meter of a phasing tool is required to verify which phases go together - Correct Answers - True To remove a jumper, three basic cuts are generally made. In the video example, the first coat was made - Correct Answers - Near the connector on the top circuit
The hotline tools used to move a line with either the lift method or the side method typically include - Correct Answers - Universal hot stick with tie stick attachments, line hose, pole guard, a handline, wire tongs, saddle clamps The lift method of moving a conductor requires ________ wire tongs, while the side method requires _________ wire tongs - Correct Answers - One, two Which of the following are types of auxiliary arms commonly used in moving three- phase distribution lines? - Correct Answers - Side, mast Which of the following is NOT a tool used to move distribution lines with an auxiliary arm? - Correct Answers - Crossarm brace Wire tongs are used with an auxiliary _____ arm to move two conductors to wire holders on the arm, and the third conductor out to the opposite side of the pole. - Correct Answers - Side When a dead-end insulator string is changed out, it _______ necessary to move the conductor out of the work area - Correct Answers - Is not True or False: when a dead-end insulator string is changed out, tension is taken up on the line so that the insulators can be disconnected. - Correct Answers - True In the video presentation, a _________ was used to install the grip, the hoist, the sling, and the link stick - Correct Answers - Shotgun True or False: it is not necessary to cover the neutral when dead-end insulators are replaced - Correct Answers - False True or False: when two primary cable ends are joined to make a continuous cable, a class 1 termination is used - Correct Answers - False When a cable is terminated, the semi conductive ____________ must be kept a safe distance from the conductor and connected equipment to keep a safe distance from an electrical ground - Correct Answers - Layer A class 3 termination provides - Correct Answers - Voltage stress control which of these is a difference between load break and non-load break elbows? - Correct Answers - One is designed to open a circuit under load, and the other can only be opened while the equipment is deenergized What is the purpose of the stress cone in primary cable terminations? - Correct Answers
- It increases the insulation at the end of the insulation shield.
In primary cable, terminations, the term "tracking" refers to what? - Correct Answers - Leakage current between the conductor and grounded insulation shield What is the purpose of penciling or tapering the primary insulation for a primary elbow?
- Correct Answers - To provide a smooth transition between primary insulation and elbow According to OSHA 29 CFR 1910.333(e), what must a person be in order to be allowed to work on electric circuit parts that have not been de-energized first. - Correct Answers
- Qualified The final step in preparing a load break elbow termination is to: - Correct Answers - Ground the elbow to a known ground source Choose the correct answer to correctly complete the sentence. An elbow termination provides a/an ________________ connection between a cable and the URD equipment
- Correct Answers - Insulated The two basic types of elbow terminations are the _____________ elbow and the __________ elbow. - Correct Answers - Non-load break, load break What is one of the considerations with three-phase elbows in a three-phase pad-mount transformer that must be taken into account? - Correct Answers - The bushings are offset A materials "K" factor is an expression of its ability to - Correct Answers - Store a charge During switch operations, three-phase elbows could create a hazard because the grounded body of the elbow may be directly over - Correct Answers - Another elbow, another bushing True or False? With all of the three-phase cables energized, phasing to verify that each cable is correct is not necessary because each cable was marked with colored tape - Correct Answers - False True or False: heat shrink terminations do not require the concentric to be grounded because the heat provides a source to earth - Correct Answers - False Three-phase cable terminations in a transformer should be __________ and rotation identified before voltage is supplied to the customer - Correct Answers - Phase matched The distance from the semi-conductive insulation shield, over the insulation, to the conductor on a cable termination is called what? - Correct Answers - Creepage distance Cold-shrink terminations are shrunken by what method? - Correct Answers - Pulling a plastic tab
When a voltage regulators control mechanism is tested during a changeout, the units switch remains _______ - Correct Answers - Closed True or False: if a voltage regulator cannot be zeroed, the bushings on the unit should be grounded so that the unit can be replaced - Correct Answers - False Which of the following are basic tasks associated with the changeout of a pole top step voltage regulator? - Correct Answers - Connecting the replacement unit, tailgate session, replacing the old unit, energizing the replacement unit, physically and electrically isolating the old unit _______ and bypassing each regulator during a changeout ensures, ensures that there is no potential difference between the two sides of the phase. - Correct Answers - Zeroing True or False: before a changeout is begun, three placement unit and associated equipment should be visually inspected for damage that might have occurred during shipping and handling - Correct Answers - True True or False: when a lineworker climbs on certain types of pole structures, the standard safety strap is sometimes replaced with at a rope lanyard - Correct Answers - True True or false: if a lineman needs to work on conductors or insulators that are inaccessible from the structure, a hook ladder if often used - Correct Answers - True
