Lineman's Test C Practice

These questions are part of the practice quiz. Start practicing

• Corrosion problems and the high cost of installation have minimized the use of __________ transformers.
• When installing an automatic splice, how are the teeth set into the conductor?
• Why are secondary cables for underground installations generally larger than those for overhead applications?
• Lightning arresters and fuses installed on distribution circuits minimize outages due to which factor?
• True or False: In an electric utility circuit, reactive current makes up the bulk of the total impedance.
• In lattice tower construction, which method involves assembling sections on the ground and then hoisting them into place?
• Fault current flows only when there is a
• The relationship between volts, amps, and ohms is expressed in an equation known as ______________.
• Utility off-peak pricing is intended to ______.
• The product of electromotive force (volts) and current (amperes) represents the rate of work. What is the unit of this quantity?
• Where should the distribution transformer be installed in relation to the load area?
• The transformer that supplies 120 volts in a 120/240-volt delta secondary is known as the ________ transformer.
• Some customers buy power at a transmission, subtransmission, or distribution voltage. The utility uses _________ for revenue metering.
• In a balanced three-phase system, is the neutral often omitted in distribution and transmission wye circuits?
• A watt is the basic unit of power, but it is very small. In the electrical utility business, __ are the most common units.
• The single-phase distribution transformer consists of a primary winding and a secondary winding wound in a _____________ core.
• Which of the following best describes why shield wires are grounded at every structure?
• Small distribution transformers installed on overhead circuits are commonly referred to as which transformers?
• Why has copper been widely used as line conductors in the past?
• A clearance tag is used to inform another person approaching the job that you are rubber gloving energized conductors downstream of that particular device.
• In typical grid planning, 230 kV is most associated with which layer of the system?
• How many control spans should be used in a sag section consisting of seven spans?
• True or False: Fault current does not need a complete circuit to flow.
• What is the phase to ground voltage in a 4160 four wire system?
• In a large, heavy lattice tower project on rough ground, which assembly method is appropriate?
• In a three-phase transformer, the basic construction is typically three single-phase transformers in a single tank.
• True or False: The risk of an arc is low when load is broken with a hot-line clamp.
• Why is it dangerous to open a neutral or ground wire on an energized circuit?
• What does the marking 'F2' on a sectionalizer indicate?
• One megawatt (MW) equals which of the following?
• During a fault with a short circuit, the current drawn from the source is best described as which of the following?
• Water will greatly ___________ the resistance of any dirty surface.
• Power transformers in a transmission substation raise the voltage from the generation voltage to transmission levels.
• Which statement best defines polarity in transformers?
• The statement "A flashlight in good working order shall always be available" is:
• Which option best represents the domain where 230 kV is standard?
• Which statement best describes the safety requirement when planning to work on a de-energized line to ensure safety?
• Which of the following is NOT a renewable energy source?
• 230 kV is typically used for which segment of the power system?
• The quality of electrical service requires that a customer's voltage is kept within an acceptable range.
• When paralleling transformers, the percent impedance of one must be within what range of the other?
• On an A-base meter, a parallel connection would put ____________ across the low-resistance current coil and result in an explosive dead short.
• Metal-clad breakers are commonly operated by _____________.
• If additional houses are to be served from one transformer, the secondaries can be extended along the rear lot line.
• Which of the following can be done from an aerial platform that shall not be done from an insulated bucket?
• Which safety step should be taken before changing distribution transformer tap settings?
• In AC circuits, inductive reactance provides opposition to current flow due to inductance.
• Which of the following is true concerning polarity?
• Lenz's Law implies the induced current direction relative to the cause of induction is to ________.
• The basic operational principle of transformers is the __________ between primary and secondary windings.
• Which tag is used to indicate clearance and authorize work on de-energized equipment?
• Which instrument is used to measure resistance?
• A recloser will provide protection for any circuit that has the capacity downstream to generate the needed fault current to trip it.
• A 25 KVA transformer has a ratio of 27.5 to 1. If the primary voltage is 13,200 V, what is the rating of the secondary in KVA?
• The three kinds of measured electrical power are _________________.
• Transformers must be constructed with the proper ___________ for the system primary voltage and the desired secondary voltage.
• Symptoms of heat stress include:
• The minimum rating for a power transformer is considered to be _________ kVA.
• Single-phase pole or overhead-type transformers can be used to obtain three-phase secondary service.
• In a sub-station, stand on a ____________ that is bonded to the steel structure to ensure that the operator's feet and hands will be at the same potential if things go wrong.
• True or False: Distribution automation gives downstream switchgear the ability to communicate with each other. During a fault on a line, distribution automation switchgear will communicate with each other and will close a feeder and tie switch to feed back upstream and create another open point to isolate the faulted section.
• A 200KVA transformer with a primary voltage rating of 7620 V would have _______ polarity.
• What device is used to dead end #2 ACSR bare primary conductor?
• What is the Sparkover effect of a voltage surge?
• In the Company's reclosure system, which protection type is used?
• Peak demand and/or warm temperatures can cause a long span of transmission to sag by an additional __________.
• When paralleling single-phase transformers for greater capacity, which condition must be identical?
• What are the three (3) kinds of loads fed by an AC Circuit?
• A ______ is installed on the output of the regulator. It sends a representative voltage to the control box.
• True or False: Transformer polarity is indicated on the name plate.
• Which system level is most commonly associated with 230 kV voltage?
• Which device is used to dead end the #2 ACSR bare primary conductor?
• The windings of distribution transformers can be manufactured with various taps to broaden the range of ______________ suitable for a given installation.
• What does the term 'ATO' stand for?
• The heat from the current flow will cause damage that can be much more serious than the ______________ might suggest.
• What must be done prior to changing the tap settings on a distribution transformer?
• In electrical safety, the act of creating a path to earth for fault currents is called what?
• The unit used to measure the rate of electrical current flow is:
• Among the listed voltages, 230 kV is typically used by which system?
• During a fault, distribution automation may perform which action to isolate the faulted section?
• In a balanced three phase circuit, where does the return current flow?
• Most residential and smaller businesses are supplied with three-phase services.
• To take advantage of the wood's natural strength, where should framing and equipment be placed on a wooden utility pole?
• The statement that the positive charge of the nucleus and the negative charge of the electrons keep the electrons in orbit and keep the atom electrically neutral is:
• In a three-phase transformer bank, polarities must be the same across all phases.
• 230 kV is typically found in which part of the electric network?
• Ohm's law expresses the relationship among which quantities?
• Oil filled sectionalizers marked F-3 can be opened under load.
• The voltage should be measured when the transformer is energized, to ensure that the connections are correct before the ________ is connected to the transformer.
• In a 4160 V four-wire system, what is the phase-to-ground (phase-to-neutral) voltage?
• True or False: It is better to leave a substation circuit breaker open and drop an entire circuit than to have a fuse blow and lose a small number of customers.
• When must qualified personnel wear rubber gloves during energized underground distribution work?
• Apparent energy metering is used when a customer is billed for apparent energy. Which meter is used?
• Substation circuit breakers automatically provide opening and closing under fault conditions.
• The electrons of good conducting material, such as __________, are dislodged fairly easily.
• Without a lift pole, what is the maximum service drop span for #2 triplex cable?
• Which of the following is a common voltage for transmission infrastructure?
• Some sources of renewable energy are ________________.
• Electrically connecting the neutrals of every wye connected transformer and generator to earth is known as what?
• What is the purpose of a Potential Tester?
• Which meter type is used for revenue metering at distribution voltage?
• With a fault occurring, which device should be the first to isolate the fault?
• Which term best identifies an oil circuit breaker?
• 230 kV is most characteristic of which part of the network?
• 230 kV is a common voltage for which portion of the electric power system?
• Protective grounds may be placed downstream of the source when it is not practical to place them at the work location.
• Which tool is described as a slender insulated pole with a hook clamp on one end and a swivel on the other end, used to hold live conductors?
• 230 kV is most commonly associated with which layer of the grid?
• Once the line has been de-energized and tested, what tools and equipment are required to establish an equal-potential work zone on a wooden pole?
• If an ohmmeter reads zero between two wires, which statement is correct?
• What is the purpose of inhibitor compound in conductor splices?
• What type of tag will you hang on the recloser after you set it to one shot, prior to doing hot-stick work down the line to replace broken insulators?
• True or False: The polarity of each transformer used in a three-phase bank must be the same.
• One horsepower equals approximately how many watts?
• Circuit breakers including _____________ and metal-clad breakers can interrupt fault current and lock out on a permanent fault.
• Lineman wearing conductive suits when working on extra-high-voltage lines are ______ to the shielding.
• If the regulatory tap setting on a single-phase transformer shifts from 100% to 97.5%, what happens to the secondary voltage?
• One horsepower (HP) = ?
• Before contacting any conductors after de-energizing a line on a wooden pole, what must be done to ensure safety?
• For a transformer with primary 2400 V and secondary 4160 V, if the primary is supplied with 2400 V, the secondary voltage is:
• Electrical current is measured with a(n) ________.
• In regional grids, 230 kV lines are typically classified under which category?
• If an inhibitor compound is not used in a conductor splice, what is a potential risk?
• 230 kV is most commonly used in which layer of the grid?
• A potential meter inside the meter measures the _______ in a service.
• Which tool is used to terminate cables with solid dielectric insulation?
• Residential consumers have very similar usage patterns, so that a ________ can cover the fixed costs without much error.
• Overhead insulators are made from porcelain, glass, or polymer. Which material is not typically used?
• Coal at the present time is the most commonly used nuclear fuel.
• Which billing component covers fixed costs in residential service?
• Overhead line insulators primarily prevent current from flowing to supporting structures or adjacent objects.
• Lightning arresters and fuses are installed on distribution circuits to minimize __.
• Which of the following describes resistance in an electrical circuit?
• If a transformer has a turns ratio of 27.5:1 and a primary voltage of 13,200 V, what is the approximate secondary voltage?
• When a lineman or patrolman is looking for trouble on a line they should always obtain a clearance prior to their patrol.
• To ________ a circuit or apparatus, means to connect it to earth.
• Which function is primarily served by insulating oil in distribution transformers to protect the windings?
• Which statement best describes the nonreclose setting?
• Most electric energy is generated at a voltage in the range of which values?
• Which statement best describes the purpose of metering apparent energy in billing?
• If current flow is in the same direction in the primary and secondary terminals, the polarity is subtractive.
• Some customers own a UPS system which is a backup power supply to keep them from experiencing even momentary outages. What does UPS stand for?
• A load-break elbow can be pulled from a load bushing with a live-line tool to interrupt a _____ amp load current.
• Which voltage range is typical for generating electric energy?
• When paralleling single-phase transformers for greater capacity, which conditions must be met?
• Which service is typically required for commercial and light industrial customers?
• Tap changers on distribution transformers are designed to be operated while the transformer is energized and under full load.
• In a balanced three-phase wye connection, the neutral current is zero.
• During a job briefing, which practice supports safety and clarity?
• Which instrument is used to measure current in a circuit?
• During a Job briefing, the person in charge will ensure which of the following?
• One gigawatt equals how many megawatts?
• A facility that terminates transmission lines and changes voltage is commonly called what?
• Overhead conductors are generally bare and insulated from other object by porcelain glass or _____________ insulators.
• Service neutrals should be grounded at the customer's service entrance.
• The transformer tank is grounded and __________ to the Primary and secondary common neutral ground wire.
• Helix anchors have one or more helix disks attached to the anchor rod. What is the purpose of additional helix disks on the same anchor rod?
• Which statement is true about nonreclose operation?
• Which of the following statements correctly lists heat-stress symptoms?
• Identify the following hot line tool by the proper nomenclature.
• Subtractive polarity is standard for all single-phase transformers 200 kVA and below having high-voltage ratings above ________ volts?
• True or False: When working on a 4 KV system extra caution is required due to its age, type of construction, and protection system.
• An equal-potential work zone is intended to ensure what condition among exposed conductors?
• On a grounded circuit, the rules for a parallel circuit apply.
• In order to prevent the line worker from being accidentally pulled off of the pole while climbing if it is snagged by a passing vehicle or by equipment used at the job site, the handline should be:
• ____________ in a conductor causes electrical energy to be converted into heat.
• Which law states that voltage equals current times resistance, commonly summarized as 'one volt to push one amp through one ohm'?
• Which service configuration is commonly required for commercial and light industrial customers?
• Branch circuits may be overhead or underground. They are often referred to as __________.
• Converter stations are used to convert AC transmission voltages to DC, and vice versa.
• Which method involves completely assembling the tower lying on the ground and then lifting as one unit onto its footers or anchors?
• A voltage check with a zero reading between ______ and the neutral will confirm that the service is not fed from another source.
• Which statement about grounding and potential rise is true?
• Which device is used to interrupt high-current loads and is described as arc-suppressing loadbreak?
• True or False: Electrical current will not flow unless it is in a circuit.
• Powerline workers are exposed to high voltages; safe contact with high voltage circuits can only be made when the resistance between the circuit and a person is high enough to prevent which?
• Steam turbines are fueled by____________.
• How often is a shield wire grounded?
• The Nx switchblade is described as which type of device?
• True or False: Protective grounds must be large enough to carry fault current long enough to trip out the circuit.
• When trying to restore power, a fuse or breaker will sometimes trip out even though the cause of the original outage has been fixed. This is known as _____________.
• Three single-phase pole-type transformers can be cluster-mounted to provide three-phase power.
• Among the following contactor designations, which is typically used to denote a normally closed contactor?
• Resistance is measured in what unit?
• In the electrical utility industry, which pair of units is most commonly used to express power?
• Power transformers in substations change the sub transmission voltage to lower levels and provide a source for the ________ circuits extending short distances to the customer's premises.
• After an unscheduled outage, aerial patrols are typically used to locate problems such as broken insulators, leaning structures, and clearance problems.
• The distribution transformer should be installed as near as possible to the center of the load area.
• Lenz's Law states that any current induced will flow in a direction to oppose the action that caused the voltage to be induced.
• Identify the function of a reclosure.
• True or False: When a switch with a handle is operated by someone standing on the ground, an insulator failure can cause the frame of the switch and structure to become energized.
• Which arrangement is used to splice a direct-buried underground cable in the field?
• What is the distribution protective scheme designed to protect?
• Power transformers in substations change the ______ levels to permit interconnecting of the generators and circuits forming the electrical system.
• Utility conservation programs try to _________________ by having reduced rate structures during off-peak hours.
• A generating station is a plant in which energy from coal, oil, natural gas, water, or atom is converted into electrical energy.
• Which of the following best describes a current coil in a meter?
• What is another term used to describe aerial spacer cable?
• The lineman wearing conductive suits on extra-high-voltage lines are bonded to the shielding.
• Transmission lines usually terminate in voltage changing stations normally called what?
• The energized installation of a self-contained meter on services more than 240V should be ________.
• Automatic splices should not be installed within _______ inches of tie wires or armor rod.
• Aerial patrols are often initiated after an unscheduled outage to locate problems such as ______.
• Kilowatt-hours measure energy. Which term best describes this measure?
• A short circuit is when the impedance between an energized conductor and another element in contact with it becomes low enough.
• When electrical current meets resistance, ________ is produced.
• Insulators are cleaned using high-pressure water, corn cob, and nutshell blasting to mechanically __________ from the insulators.
• The term used to describe the maximum rate of electricity usage is called what?
• Which part of the grid is typically served by 230 kV lines?
• Which device is installed on lines experiencing prolonged vibration to prevent conductor fatigue?
• Which option correctly identifies a bare copper conductor tie?
• When a circuit is faulted, or short-circuited, all the __________ which the electrical system is able to supply to the faulted location goes to that fault.
• How do you close a sectionalizer that has tripped when dispatch permission has been obtained?
• What does the level of fault current at a work location depend on when working on a hot secondary circuit?
• When a clamp top insulator is used, what is needed at the point of attachment?
• A transformer has a turns ratio of 20:1 and a secondary voltage of 120 V. What is the primary voltage?
• When working on a distribution transformer, the secondary should be completed last to eliminate the danger of ________.
• The energized installation on services greater than 240V should be avoided.
• Which statement about voltage surges is consistent with the described coupling between phase and neutral?
• Which method is used for assembling lattice steel towers when they are large and heavy and the ground is rough?
• Which system level is commonly operated at 230 kV?
• When a clamp top insulator is used, what is needed at the point of attachment?
• When the term voltage drop is used, it is generally in reference to:
• Wind-propelled turbines are constructed with _________ rotor blades and a horizontal-axis turbine generator.
• When pole holes are dug and the pole cannot be set for whatever reason, the hole must be __________ if left over night.
• If no flashlight is available, matches or a cigarette lighter are acceptable.
• Where is fault current typically most available in an electric system?
• Hardware on wood transmission structures operating above 230KV is bonded above the top of the X brace. Why is this bonding done?
• What type of tie should be used on bare copper conductors?
• Which statement about underground cables when de-energized is correct regarding grounding?
• Which statement about transmission lines is true?
• The ground strap on a common single-phase pad mount distribution transformer is connected to which part?
• When AC current flows into a coil, there is additional opposition to current flow caused by __________.
• Which of the following is the most likely cause for a streetlight burning during daylight hours?
• Which safety practice is recommended when using a ladder during electrical work?
• What tool is used to set the teeth on an automatic splice?
• Transmission lines can be overhead or underground.
• Which statement best explains why extra caution is required on 4 KV systems?
• Single primary bushing transformers can be on delta primary systems.
• One kilowatt (kW) =
• Electric distribution companies have an obligation to provide quality ________ to their customers.
• In a nine-duct conduit run that is completely empty and four power cables, should the cables be placed in the middle ducts to reduce heat radiation?
• What amp percentage must be verified for a mechanical jumper to ensure it carries a safe portion of the load before cutting the conductor?
• Which combination of tools is required to establish an equal-potential work zone?
• After skin resistance breakdown, the internal body resistance ranges between which ohms?
• The Nx switchblade is a(n) __________________ device that is available as a current-limiting fuse or a solid-blade device.
• Which instrument would you use to determine the current flowing in a wire?
• A zero reading between L1 and L2 would indicate the service is not fed from another source.
• When working on energized equipment, why is the second point of contact considered a hazard?
• What is the maximum service drop span length (pole to house) for #2 triplex without a lift pole?
• The coil- and-core assembly of the distribution transformer is completely immersed in insulating oil to keep operating temperatures low and to provide additional insulation for the ________.
• What is the primary function of a sectionalizer in a distribution feeder?
• Which device is designed to automatically interrupt a circuit and then reclose it after a fault on a distribution feeder?
• Which option represents a wye-connected secondary voltage?
• As with all transformers, the ____________ of an instrument transformer must be known and marked on the transformers.
• What is normally used to terminate cables with solid dielectric insulation?
• To measure the amount of potential voltage that is available in a circuit, which instrument is used?
• Protective relays in substations detect faults to trip breakers. Which faults are they most commonly recognizing?
• Wind turbines rotor blades are of which type?
• When making compressions on a distribution compression sleeve, how should the presses be made?
• Which two factors determine a conductor's resistance?
• Why are switches installed in distribution feeder circuits?
• A S-base meter is plugged into a meter base which has been prewired to match the lugs of the meter to be installed. The meter is usually installed with the top incoming lugs ______.
• When connecting an A-base meter under energized conditions, it is critical to connect the current in ______.
• Which device is typically the first to isolate a fault in a faulted section of a distribution circuit?
• The use of a cutout with an expulsion fuse will prevent all violent explosions and fires in transformers.
• Identify the following hot line tool by the proper nomenclature.
• Which statement about a UPS is true?
• Identify the function of a capacitor.
• Which type of contactor is normally closed?
• What happens to the voltage on a phase conductor and the neutral if a voltage surge is great enough to have a coupling effect between the two?
• Which option best describes the domain where 230 kV is commonly applied?
• Which device is used to prevent fatigue failure of lines experiencing prolonged vibration?
• When a cutout is opened with a switch stick, the cutout is operated like a regular isolating disconnect switch that has ________________ capability.
• Which transformer characteristic is essential to match both the system primary voltage and the desired secondary voltage?
• All distribution transformer tanks and __________ conductor(s) of all transformer secondary circuits should be grounded to protect life and property.
• To measure the maximum rate at which electricity was used and can be measured as kW, kVA, kVAR, we use _____________.
• Which device sends a representative voltage to the control box from the regulator output?
• In the event of skin resistance breakdown, the internal body resistance is typically in which range?
• What is the primary purpose of marking polarity on instrument transformers?
• Which statement best describes the grounding approach where neutrals of every wye-connected transformer and generator are tied to earth?
• Sparkover is defined as a disruptive discharge along which path?
• Which instrument is used to measure current in a circuit?
• The statement "Thoroughly secure the ladder to an unmovable object, or have it held by another employee" is true or false?
• Which instrument is used to measure voltage?
• Which statement best describes why switches are installed in distribution feeder circuits?
• Which parameter do electric distribution companies typically monitor to ensure service quality?
• True or False: Three-pole, group operated switches provide a means for lineman to sectionalize or connect the feeders to other circuits.
• Which of the following is not a typical load type in an AC circuit?
• In an S-base meter installation, the top incoming lugs are typically ______.
• Which device is used to improve power factor in a substation system?
• Which material is cited as a good conductor in which electrons are dislodged fairly easily?
• When untangling energized conductors with hot tie sticks, should you cut the tie as close as possible to eliminate the possibility of contacting a different potential?
• What precautions must be taken before returning a clearance?
• True or False: When working a de-energized primary line, grounding and short-circuiting at the work location must be maintained until completion; if not practical, protective grounds may be placed downstream of the source.
• The amount of resistance offered by a conductor depends on the conductor's size and length.
• Bonding hardware on wood structures above 230 kV primarily serves to address which hazard?
• True or False: Grounding an electrical system limits the rise in potential on the neutral, metal structures and noncurrent-carrying electrical equipment.
• What condition is required for electrical current to flow in a circuit?
• When hauling poles, how should the overhang off the back of the trailer be marked?
• Circuit breakers in substations serving as a source to distribution circuits are actuated by protective relays that recognize which on a circuit?
• The amount of power used over time measured in kilowatt-hours is __________.
• The voltage rise needed to push current through resistance is described by which parameter?
• A transformer name plate lists 2400/4160; 120/240. What is the voltage required by the primary winding?
• Which statement about transformer polarity is supported by the material?
• True or False: A human body does have enough resistance to prevent fatal current flow when contact is made with primary voltage.
• There are generally three types of charges a customer can be asked to pay. What are they?
• What type of circuit develops a voltage drop?
• Which hotline tool can be described as a slender insulated pole provided with a hook clamp on one end and a swivel on the other end and is primarily used in holding live conductors?
• The bulk of the electric energy produced in the US is generated using what method?
• Underground direct-buried cables are normally spliced using which arrangement?
• Which power is defined as the vector sum of real and reactive power?
• In most cases, a three-phase transformer is basically three ____________________ in a single tank.
• What is a potential hazard when an A-base meter's current coil is connected in parallel under energized conditions?