Lineman Apprentice Practice Test

These questions are part of the practice quiz. Start practicing

• A ground rod that penetrates perpetually moist earth will have what kind of resistance?
• True or False - DC circuits have no lead or lag in current versus voltage.
• What distinguishes a two bushing transformer from a CSP transformer?
• What do electronic fuses provide when used for service entrance protection?
• What equipment provides high frequency voltages for transmitting voice communication on high voltage transmission circuits?
• What coating is often used to fill the outer splice to prevent oxidation?
• Which scenario describes when a transformer should not be adjusted?
• Recommended pole setting depth for a 45 ft pole in rock is?
• When was DC Transmission initiated in Germany?
• Where were the first electric arc lamps installed?
• During which season can more power generally be drawn from a transformer?
• What is the purpose of insulating materials in electrical wiring?
• If one transformer of a closed delta bank is removed, what percentage of the original capacity can the remaining transformers handle?
• What percentage of the weight of traditional insulators does an insulator made from synthetic material such as silica or fiberglass typically weigh?
• What is the simplest and most commonly used tie in electrical work?
• In a transformer, the secondary terminals X3, X2, X1 from left to right represent what type of polarity?
• Transmission voltage typically ranges from:
• What is an advantage of a Wye Primary system over a Delta primary system?
• Feeders generally operate within which voltage range?
• What should be done before installing grounds on a conductor?
• The resistance of a Cadmium-Sulfide cell "photo cell" when dark is __________.
• What is the maximum current flow from a generating plant?
• What is an atom called when it has no free electrons?
• What is the main purpose of installing a guy wire?
• In P-type semiconductors, there is a __________ number of electrons.
• What does the term "roofing a pole" refer to?
• What is the minimum ground clearance for secondary service lines in pedestrian areas up to 750 volts?
• True or False: Motors operating on three-phase are generally more expensive and less efficient than single-phase motors.
• Which device is used for coordination and protects the customer's system?
• What type of material are the semiconductor blocks in a lightning arrestor made from?
• What is the minimum bending radius "R" for reverse curves in lead covered cables?
• What voltage level is classified as experimental voltages?
• What does the term "neutral wire" refer to in a 4 wire distribution circuit?
• When discussing conductors, code names used are typically ________.
• Under what condition would adjusting a no load tap changer be deemed unnecessary?
• Prior to using any electrical tools, what is essential to verify?
• Leather parts of climbing equipment should be cleaned approximately every _________.
• True or False: When applying a splice on wire, the wire should be straight for a distance of 10 feet.
• The primary purpose of insulating a guy is to __________.
• What length of mast arm is used in residential areas with streets less than 40 ft wide?
• Why is it necessary to insulate a guy?
• What is the polarity order of secondary terminals on a transformer from left to right?
• What is the recommended direction for washing insulators?
• In which order should aluminum and copper be placed when making connections?
• What does the acronym XLPE stand for?
• What does the abbreviation MOV stand for?
• How many times can a recloser operate before it "locks out"?
• What is the crew size needed to pike a 40 ft pole?
• The need for apprenticeship training was recognized in the __________.
• What is the optimum insulating SF6 gas pressure?
• A three-phase transmission system requires what fraction of the total weight of conductor needed for a single or two-phase system?
• For splicing stranded conductors, what is the size range of compression tools for aluminum?
• What are the three loading districts for wire?
• How many horsepower does 1 KW approximately equal?
• Where is the breaker in a substation installed?
• Which devices are used by converter stations to convert AC to DC?
• Which connection is used where tension is anticipated on the conductor?
• What is typically necessary to install if a power transformer lacks auto tap changing underload equipment?
• What do converter stations do to alter electrical currents?
• What type of protection is used for equipment like potential transformers or power transformers?
• In alleys, what length of mast arm is typically used?
• What is a key factor in maintaining transformer efficiency?
• Which components transmit high-frequency voltage communication signals in transmission lines?
• Lightning arresters are primarily installed to protect against what?
• Which two voltage types on transmission lines require a corona shield?
• In a Thury system, generators are connected in what configuration?
• Should distribution transformers be installed as close as possible to the center of the load that they are feeding?
• In which type of device does current lead voltage?
• If the resistance of a ground rod exceeds 25 ohms, what should be done?
• What do lightening arresters protect a substation from?
• The air we breathe contains what percentage of oxygen?
• True or False: Large single phase motors have a much smaller voltage drain at startup compared to three-phase motors.
• What is the typical range for the power factor in many calculations?
• What voltage range do subtransmission substations generate?
• How much more efficient are amorphous metal cores than laminated steel cores?
• How much oxygen do we exhale after use?
• What is the maximum use voltage for class 3 gloves?
• Which type of semiconductor can be used as a current rectifier?
• What is an advantage of using XLPE over traditional polyethylene?
• What happens if tension is not applied when using an automatic splice?
• When splicing transmission conductors/wires, how far should a conductor be laid in each direction before splicing?
• What is the purpose of a capacitor bank in a substation?
• What problem does using a popsicle eliminate in a stranded aluminum conductor?
• Where should the attachment of the conductor to the insulator be located when using armor rods?
• What would be the effect on three-phase equipment if the rotation of a bank is changed?
• For underground services to new homes, what size aluminum conductor is typically installed to deliver 200 amps?
• How many weeks before cutting should trees and brush receive a basil spray treatment to prevent regrowth?
• What should be done before lowering a victim to the ground?
• At what frequency is A/C power generated in the United States and Canada?
• How far below the inside prominence of the knee joint should the top of your climbers be?
• How does the tensile strength of aluminum compare to hard drawn copper?
• How far should a light be located above the surface of roads less than 40 feet wide?
• When switching systems, what is a common effect of changing from Delta to Wye?
• What primarily causes a fuse link to melt or blow?
• What should be filled in the outer splice of a conductor to prevent oxidation?
• What type of diode can be used as a voltage reference in a circuit?
• What is an important safety step when working with electric systems?
• How much does loose sandy-gravel-type soil weigh approximately per square foot?
• During CPR, what fraction of normal blood flow is accomplished through chest compressions?
• Which of the following is a characteristic of free electrons in a conductor when voltage is applied?
• What kind of maintenance is applicable to transformers with metal caps?
• What is the term for the part of the rope that is looped for tying knots?
• What is the crew size needed to pike a 30 ft pole?
• Lines with less than 5,000 volts are typically covered with what type of material?
• What is the additional measurement for D-ring size around the hip bones?
• Which component can be used in a circuit to amplify a signal?
• Which type of connection may be used when the line is slack?
• What percentage of the standard rigid-lattice work steel tower does the structure assembly of steel H-frame structures cost?
• What does the acronym EPR stand for?
• In electric current, what typically occurs in relation to voltage?
• Can grease on conductors cause the generation of corona?
• What maintenance frequency is recommended for cleaning leather parts of climbing equipment?
• What is the basic understanding of electricity commonly referred to as?
• The head of a hydraulic operated tool weighs approximately how many pounds?
• In electrical terms, what does impedance consist of in a transformer?
• When connecting copper and aluminum conductors, which should be placed on top?
• How many classes of rubber goods exist in electrical work?
• The cost of structure assembly of steel H-frame structures is estimated to be approximately _________ percent of the standard rigid-lattice work steel tower.
• What kind of circuits do transistors typically work with?
• DC cable insulation must provide a safety factor of how much?
• The resistance of a Cadmium-Sulfide cell “photo cell” in the light is most likely to be ________.
• What voltage or less is classified as low voltage or utilization voltage?
• What piece of equipment is used to convert AC to DC?
• Who developed a high voltage DC transmission system and in what year?
• What percentage of tensile strength does aluminum retain compared to copper of the same size?
• What type of splices must be used when transmission and distribution line conductors are under tension?
• How does the conductivity of aluminum compare to that of copper?
• How can the value of a secondary voltage be changed on a transformer?
• What is a key characteristic of aluminum wire compared to copper wire?
• In N-type semiconductors, there is a _________ number of electrons.
• Which of the following statements about arresters is true?
• What is the role of semiconductor blocks within arresters?
• To match the conductivity of copper, how much larger must an aluminum wire be?
• True or False - The primary side of a transformer has high voltage and large current.
• What is the maximum length of a sag section limited by?
• What length of mast arm is used where streets are more than 40 ft wide?
• What is one consequence of improper adjustment of a transformer?
• Cable lube reduces the friction between the cable and duct walls by as much as _______%.
• What is the primary function of a breaker within a distribution system?
• If a distribution transformer is installed incorrectly, what might be affected?
• What is the difference between a 3 wire and a 4 wire distribution circuit?
• By switching a distribution system from Delta to Wye, what is the increase in load carrying capacity?
• In a three-phase system, what advantage do the motors generally provide over single-phase motors?
• Which of the following components helps control rot in a utility pole?
• Which of the following materials is considered a good conductor?
• What is the first step in guy installation?
• What is the formula for calculating electrical power?
• A wire tong is used to ____________.
• What type of circuits originate in distribution substations to connect electricity to customers?
• Which component utilizes compressed air to operate and interrupt circuit flow when contacts open?
• What is the standard polarity of a 14.4 transformer that is less than 200 kVA?
• Is the statement "cold flow" used to describe load encountered when you first energize a line accurate?
• True or False - When free electrons in a conductor flow in one direction, it is called current of simple current.
• What happens to the power factor when the lead or lag is large?
• What class of rubber gloves can be used for 17,000 a/c voltage?
• If an alum wire has the same conductivity as copper, what percentage of strength does it retain?
• Who designed and buried a transmission system using copper rods insulated with jute?
• What is a defining characteristic of ultra-high voltages?
• What is the purpose of rescue breaths before lowering a victim?
• True or False: Circuit switchers operate by manually operating a switch or through remote supervisory controls.
• Which tool is commonly used to measure line tension?
• What happens to the fiber inside a cutout barrel each time it fails?
• When voltage is applied to a conductor, what happens to the free electrons?
• How far should the line be laid out straight before splicing distribution wires?
• What device is responsible for changing AC to DC?
• What is the typical installation setup for overhead secondary mains?
• Which of the following is a characteristic of steel wire in electrical applications?
• Slices should not be installed how far from a tie wire or armor rod?
• What initiation method is NOT mentioned for high voltage circuit breakers?
• Which type of primary system is known for better voltage regulation?
• Which of the following is NOT a key factor to consider when choosing a conductor?
• What is the typical range for the power factor?
• In which type of device does current lag voltage?
• What is the term used for the total opposition to the flow of current in a transformer?
• How long can the human brain typically survive without oxygenated blood?
• What is a primary benefit of using DC transmission circuits for long distances?
• How much larger must aluminum wire be compared to copper wire to achieve the same conductivity?
• DC circuits typically consist of how many wires?
• What is the crew size needed to pike a 35 ft pole?
• What is the primary purpose of a no load tap changer?
• What is typically found in a distribution substation?
• What type of connectors are typically used for splicing stranded conductors?
• What type of electrical component is primarily responsible for commutation?
• What percentage of rated voltage does the standard tap variation provide on transformer primary windings?
• What are the locations of protective devices such as PMR known as?
• What is the minimum breaking strength of a seven-strand #8 Alumoweld guy cable?
• If the diameter of the pole being set is 10 inches, what should the diameter of the hole be?
• What voltage are hot line tools factory tested at per foot?
• What feature is contained in compression sleeves for ACSR conductors?
• What is the color code for #10 Insulink splice?
• Are disconnect switches or breaker isolation switches designed to open fault current?
• A Thury system transmits how many amps at a maximum voltage of what value?
• Which characteristic is critical for a conductor to transmit a large amount of power effectively?
• Which materials are commonly used for wire insulation?
• Is it true that a no load tap changer can be adjusted while the transformer is energized?
• What provides overcurrent protection for the secondary leads in a CSP transformer?
• What is a common application of insulating materials in electrical systems?
• What characterizes a good electrical insulator?
• Are capacitors and transformers nearly identical in their operation?
• When voltage and current rise and fall simultaneously, what is the power factor?
• Which materials are typically used for manufacturing solid state devices?
• What component can be added to eliminate pulsating output voltage in a circuit?
• What types of hazards do protective grounds safeguard line workers from?
• Voltages in the range of 69,000 to 230,000 are classified as what type of voltages?
• True or False: A generator produces electricity directly.
• Steel wire has __________ to ___________ of the conductivity of copper.
• What impact does ambient temperature have on transformer efficiency?
• What type of device is indicated by an overload indicator on CSPs?
• When is it appropriate to work on a transformer?
• Voltages of 1 million volts or more are classified as what?
• What current does a 120 volt, 60 watt incandescent bulb draw?
• What size tie wire is recommended for conductors that are #4 and smaller?
• DC transmission circuits are economical when overhead lines extend over how many miles?
• What is the breaking strength of 5/16 utility grade guy wire?
• What would be a necessary action if a transformer shows signs of overheating?
• Why is nailing a metal cap on top of a pole not considered roofing?
• The most energy efficient transformer cores are constructed with which materials?
• What process reduces the tensile strength of wires?