3rd Year Lineman Apprentice Practice Exam

These questions are part of the practice quiz. Start practicing

• What is the number of bushings on the low side of a 2400/4160Y-120/240, 50 Kva transformer?
• For a 240 3-phase 3-wire system, which connection is required?
• What variable produces speed on the disk of a watt-hour meter?
• What is an important consideration when outfitting electrical systems with wires described in circular mils?
• Which layer of body tissue is responsible for containing the organs of the skin?
• What are eddy currents a result of?
• What potential safety concern must be addressed when grounding in a transformer system?
• What happens to a grounded wye high side of a wye-delta three phase transformer bank during imbalance?
• What type of electrical meter is known for its high accuracy?
• Which of the following is the correct unit of measure for the voltage in an electrical circuit?
• If 12 mH and 24 mH are connected in series, what is the total inductance?
• What is a lumen used to measure?
• Where is the hazard of high fault current especially critical?
• What happens to the equivalent capacitance when equal capacitances are connected in series?
• Which of the following is a characteristic of 1st degree burns?
• Which factor is NOT relevant when determining the type of connection on the high side of a transformer?
• Which component allows for 360 degree rotation of the boom in a hydraulic system?
• Circular mils can be expressed in which of the following measurements?
• What is the term for the procedure of testing for an energized conductor by placing metal in contact with the line?
• The "Left Hand Rule" applies to which of the following?
• Does the transformer with specifications (12470GrdY/7200-120/240) 167 Kva have secondary internal connections?
• What is the minimum trip current of an OCR in relation to the normal load current rating?
• If the total voltage in a circuit is 233 volts and the impedance is 58.3 Ohm, what is the current?
• When two capacitances of equal size are connected in series, how does their equivalent capacitance compare?
• A three-phase transformer bank connected in delta configuration will typically have what power capacity compared to a wye configuration for the same kVA rating?
• What is the protective device closest to the source called?
• What does the "10" signal represent in radio communication?
• In electrical circuits, which of the following is typically used as a unit of frequency?
• What is generally true about electrical equipment such as transformers regarding grounding?
• What is the biggest disadvantage of sodium vapor lamps?
• How many sides of an open circuit must be grounded?
• What is the biggest advantage of a wye system?
• How is the inductive reactance of a circuit affected if the frequency increases?
• What fault condition results when two or more conductors of the line come into contact with each other, with one line feeding another?
• What is the risk of allowing a pump to operate above its recommended RPM?
• What is the symbol used for impedance?
• What is the biggest advantage of the wye system?
• What is one primary advantage of using an electronic oil circuit recloser?
• What ground voltages are available on a 120/240 3-phase 4-wire system?
• Radial-vane, concentric-vane, and plunger are all examples of what type of meter movement?
• What is the unit of measure for reactive power?
• How many terminals are present on the low side of the (67000-2400/4160Y) transformer?
• How many bushings are found on the low side of a 2400/4160Y-120/240, 333 Kva transformer?
• What type of burn is classified as having blisters?
• What device protects a fuse from a temporary fault?
• The formula 1/(2πfC) is associated with the calculation of which of the following?
• What force is responsible for opening an Oil Circuit Recloser (OCR)?
• A ratio of 1 to 1.73 for a low side voltage rating of a three-phase transformer bank signifies which type of connection?
• What type of distribution system is characterized by having 7200 volts in a 3-phase, 3-wire configuration?
• What is the significance of inductance in an electrical circuit?
• What is the formula used to calculate impedance in an electrical circuit?
• What type of fuse is designed to open on the first 1/4 of the fault cycle?
• What is the formula for calculating impedance in a series circuit?
• A transformer rated at 69000-7200/12470Y would connect as which type to a 69000 volt 3-phase 3-wire system?
• What are the common oil seals used in hydraulic systems?
• What does the term "burden" represent in transformer context?
• What is an important factor in assessing the safety of electrical systems?
• In a hydraulic system, how does removing air from fluid lines affect performance?
• Which unit is used to measure inductance?
• The required type of connection on the high side of a transformer depends on what?
• What advantage does a vacuum recloser have in comparison to other types of reclosers?
• What is the primary effect of "single-phasing" on a three-phase transformer bank?
• What is the proper connection type to install a transformer rated at 12470GrdY/7200-120/240 to a system voltage of 12470 volts?
• How does vaporized oil contribute to the operation of an oil switch?
• When the dual tap changer is set on low, what is the coil voltage on the high side of the transformer rated at 2400X7200/12470Y-120/240?
• How should splicing with aluminum conductors be treated to enhance safety?
• What type of light bulb is considered most energy-efficient compared to incandescent bulbs?
• In a watt-hour meter, how is the "potential coil" connected to the line?
• Which electrical component is crucial in transforming voltage levels in circuits?
• What metric is used to express the area of a circular cross-section in electrical engineering?
• What practice is fundamental when working with wire sizes as measured in circular mils?
• What is the minimum size required for a protective ground?
• Which statement is true regarding a capacitor in a DC circuit?
• What type of measurement can the basic meter movement directly measure?
• In a 3-phase wye system, how many wires are typically used?
• This transformer, when banked and connected delta on the low side, would yield which of the following system voltages?
• Which sectionalizing device is specifically designed to protect the fuse from temporary faults?
• What does an inductor store in its magnetic field?
• What is a primary use of a ballast in electric circuits?
• Which type of meter movement is most commonly used for a "strip-chart" recorder?
• What does the in-line filter contribute to the overall functionality of a hydraulic system?
• How is the "current coil" connected in a watt-hour meter?
• On a 277/480 3-phase 4-wire system, what is the voltage to ground?
• What is the unit of measure for the rate at which work is being done?
• What is the key characteristic of a protective ground?
• What is the primary purpose of a holding valve in a hydraulic system?
• A secondary rating of 240 3-phase 3-wire with corner ground will have voltage values from phases to ground of what?
• The calculation of circular mils is essential for ensuring which of the following?
• Is it possible to phase transformer banks with dissimilar displacements together under normal conditions?
• Is it true that all three-phase transformer banks can have only a single phase displacement?
• What is the function of a ballast in electric discharge lights?
• The number of watthours represented by one revolution of the disk is known as what?
• Is the "trip coil" of an oil switch directly connected to a low voltage line?
• What instrument is used to indicate small values of electric current?
• What does CSP stand for in electrical terms?
• What term describes the maximum available short circuit current at a specific point in the system?
• Which formula is used to calculate inductive reactance?
• What is the line to line voltage on the secondary side of a distribution transformer rated 2400/4160Y-120/240?
• What is the opposition to current flow in an electric circuit caused by changes in voltage or current called?
• Which of the following is a component that aids an oil switch's performance?
• What opposes a change in current due to inductance?
• What classification is given to a burn that indicates redness?
• What is the purpose of a ground connection in electrical systems?
• What is the term for the voltage produced from an inductor that opposes a change in current flow?
• How is the rate at which work is done defined?
• What is the practical advantage of using a tap changer on a transformer?
• In electrical engineering, to find the appropriate wire size, which information is critical?
• What can shims be used for in the installation of base plates on footings?
• What is the unit of measure for inductance?
• Which fault condition exists when one or more line conductors contact the earth potential?
• Which voltage is associated with a standard 7200 3-phase 3-wire system?
• Which of the following statements is true regarding local regulations and the National Electrical Safety Code?
• What is the basic type of meter movement that can measure current?
• Can the "Oil Circuit Recloser" distinguish between a temporary and a permanent fault?
• The "moving coil" meter movement operates on the principle of interaction with which magnetic field?
• What effect does increasing the number of turns in the primary coil of a transformer have on the secondary voltage?
• Is the number of wires in a 7200 3-phase 3-wire system indicative of the connection used at the substation?
• Minimum Approach Distance increases at altitudes exceeding how many feet?
• Which of the following factors affects the value of a capacitor?
• What is the total opposition to current flow in alternating current circuits measured in?
• How is the relationship between voltage and the number of turns in a transformer characterized?
• Which statement is true regarding an inductive load in electrical circuits?
• True or False: The wye secondary must have the common or neutral point grounded.
• What does a standard displacement in transformer banks refer to?
• What is a primary advantage of hydraulic drive systems over mechanical drive systems?
• What is the system voltage for a 7200 3-phase 3-wire configuration?
• How many possible phase displacements can all three-phase conventional transformer banks have?
• When a three phase transformer bank with a grounded wye high side connection loses one phase, how does it operate?
• What happens to current in an inductive circuit when the switch is suddenly opened?
• What type of transformer is utilized at the high side in the (67000-2400/4160Y) specification?
• What is the force that closes an Oil Circuit Recloser (OCR)?
• What is the low side coil voltage for the (67000-2400/4160Y) transformer?
• What does the type of connection on the low side of a transformer depend on?
• What should be done to all conductors before splicing?
• When vectoring a 12470 volt 3-phase 4-wire system with a scale of 1/8 inch equal to 600 volts, what is the length of each vector?
• A service rated at 277/480 3-phase 4-wire requires which connection on the low side of the transformer bank?
• What is the minimum pole ground size for distribution systems?
• What is the purpose of the delayed third operation of an Overcurrent Relay (OCR)?
• Which component measures the voltage across a circuit?
• What is a transformer rating that is suitable for either wye or delta connection?
• Why is it critical to maintain pump shaft rotation speed below 2000 RPM?
• What is the most reliable grounding method for a steel transmission structure?
• What is the impedance of a transformer rated at 2400/4160Y-120/240 that reaches full load current on the secondary side when applying 40 volts to the high side?
• What is the unit of measure for inductive reactance?
• What grounding condition is specified for the high and low side in a wye-wye connection?
• What is the only measurement capability of the basic meter movement?
• What are the two basic types of electromagnetic meter movements?
• Which connection is used for a transformer rated at 7200/12470Y-120/240 when connected to a system voltage of 7200 volts?
• A transformer rated at 7620/13200Y-120/240 would be connected how to a 7620 volt 3-phase 3-wire system?
• Can the license for operating a two-way radio be revoked for abusing FCC rules?
• In relation to system voltage, what is the 'phase to phase' value for a 7200 3-phase system?
• What is the recommended protective ground for a Delta distribution system?
• What role does the National Electrical Safety Code (NESC) play in safety planning?
• What are the first connections made on a transformer?
• Which two sources are classified as types of visible electric light?
• For a transformer rated at 67000-7200/12470Y, 500 Kva, how many bushings are on the low side?
• Which type of meter movement uses a coil suspended in a magnetic field?
• Which three-phase transformer connection yields a displacement of 0 degrees by conventional means?
• What does an inductor oppose according to its function?
• What principle is demonstrated by the use of current limiting fuses?
• How should first aid be applied if a person is stung by a bee?
• Which of the following statements is true regarding wire size and circular mils?
• Which waveform represents 360 electrical degrees for an AC signal?
• What is one potential downside of using a fuse instead of a circuit breaker?
• What law states that pressure at a point in a static liquid is equal in all directions?
• How much capacitive reactance would a 60 cycle circuit with an 88.464 microfarad capacitor have, rounded to the nearest whole number?
• In a wye-wye connection, what is required for both the high and low side?
• What is the term used to describe the ability of a magnetic field to penetrate a material?
• What happens to the starting winding in a motor when the centrifugal switch engages?
• Which connection is typically used for grounding in a wye transformer configuration?
• What is the total inductance when 12 mH and 24 mH are connected in parallel?
• What should always be accounted for when working with ladders at heights?
• What is the phase to neutral value of a 13,800 volt 3-phase 4-wire system?
• What is the term used to define the area measurement of a circle with a diameter of one mil?
• What is the line to neutral to line to line voltage ratio in a three-phase wye system?
• What is the high side coil voltage for a transformer with a rating of 7620/13200Y-120/240?
• What transformer rating indicates that it is good for a wye connection only?
• Are "Vane" and "Gear" types of hydraulic pumps?
• Which connection is necessary for a 120/208 3-phase 4-wire electrical system?
• Is the statement true or false? "The stator consists of a potential coil and a current coil."
• What is the phase to neutral value of a 13200 volt 3-phase 4-wire system?
• Which of the following describes the movement of a moving coil meter?
• How is the load factor defined?
• In electromagnetic meters, the movement is most affected by what?
• What is the high side coil voltage for a transformer with a specification of (12470GrdY/7200-120/240) 167 Kva?
• What is the coil voltage on the high side of a (67000-2400/4160Y) transformer?
• When vectoring a 12000 volt 3-phase 3-wire system, what is the length of each vector if 1/8 inch equals 500 volts?
• In a circuit with an inductor, how does the current behavior differ from that in a resistive circuit?
• What is the rake measurement on a 40-foot dead end pole?
• What type of meter has evenly spaced numbers on its scale?
• What is the phase to phase value of a 7200 volt 3-phase 3-wire system?
• What is the significance of evaluating fault current in an electrical system?
• What is a common application of an inductor in electrical circuits?
• To which device does the "Right Hand Rule" apply?
• What represents the number of watt-hours for each revolution of the disk in a kilowatt-hour meter?
• What principle enables an oil switch to effectively break an arc?
• What is the unit of measure for capacitive reactance?
• What is the role of the poppet valve in a hydraulic system?
• According to Blondel's Theorem, how many meter elements will measure energy in a system with N conductors?
• What does an "Open" fault condition indicate about one or more line conductors?
• What is the role of the spring in an Oil Circuit Recloser?
• What is the function of the "trip coil" in an oil switch?
• What type of meter movement is primarily used to measure temperature?
• Which agency is responsible for regulating the operation of two-way radios?
• What term is used to describe work done in energy terms?
• What occurs to a three-phase transformer bank with an ungrounded wye high side connection if one phase is lost?
• According to electrical safety standards, poles should be examined for which of the following?
• A transformer has a coil voltage of 7200 to 240 volts. If the full load current on the high side is 5 amps, what is the full load current on the low side?
• Which piece of equipment is commonly used to protect against overcurrents in electrical systems?
• True or False: A wye on both the high and low side must have a ground on the low side; however, the ground on the high side may be floated.
• Which voltages are available in a primary system rated at 24940 volt 3-phase 4-wire?
• What method controls the sequence of operations of an Oil Circuit Recloser?
• What unit is used to measure impedance in electrical circuits?
• What type of connection is needed for a 480 3-phase 3-wire electrical system?
• What characteristic is important for the performance of a fuse?
• Which plants are considered contact poisons?
• The formula 2πfL is used to calculate what component in electrical circuits?
• How would a transformer rated at 2400/4160Y-120/240 be connected to a 4160 volt 3-phase 4-wire system?
• What is a common characteristic of Oil Circuit Reclosers?
• Where is the in-line filter situated in a hydraulic system?
• What is the primary purpose of measuring impedance in a circuit?
• If the secondary internal connections are connected in parallel, what is the voltage available on the low side of the transformer rated 2400/4160Y-120/240?
• What is the main function of a transformer in an electrical circuit?
• How often should the filter on a hydraulic system be replaced?
• What term describes a constant value used in calculations?
• What is the recommended procedure for warming up hydraulic oil in cold weather?
• Which transformer configuration is used when a neutral point is required?
• What is the relationship between voltage and current in a transformer?
• What effect is received from current flow through a conductor?
• What device allows current to flow in only one direction?
• A ratio of 1 to 2 for a low side voltage rating of a three-phase transformer bank indicates which type of connection?
• How is efficiency in lighting measured?
• Which electrical component is critical for ensuring safety during a fault?
• Which of the following describes a mil in terms of diameter?
• What standards must be applied to grounds at a work location?
• What type of valve is used to redirect pressure back to a reserve tank in a hydraulic system?
• What are the voltage values to ground for a secondary rating of 120/240 3-phase 4-wire?
• What type of load is better balanced with a wye configuration?
• In transformer specifications, what does the voltage rating of 240 volt typically refer to?
• What type of fault condition occurs when two or more line conductors are in contact, resulting in heavy fault current?
• What does the symbol Xl represent in electrical circuits?
• How many connections to ground must all electrical equipment, such as transformers, have at a minimum?
• For an OCR to operate normally, what value of current is required to open the circuit?
• What is the phase-to-phase voltage rating of a primary system rated at 7200 volt 3-phase 3-wire?
• What is the total inductive reactance of a parallel circuit with two inductors, one with 80 ohms and the other with 20 ohms?
• What are the two fast operations of an OCR primarily aimed at protecting?
• What is the primary factor that affects the operation of a fuse?
• When connecting a transformer in a delta configuration, what is the relationship between line and phase voltages?
• If two consumers report an outage, what action should a lineman expect to take next?
• What is the purpose of a metal base plate on footings?
• In electrical engineering, what does "reactance" refer to?
• What is the effect of load diversity in electrical systems?
• Burns are classified based on what criteria?
• For a transformer bank with a rated voltage of 7200/12470Y, how is it connected to the grid if the system voltage is higher than 7200 volts?
• What is the purpose of a power factor in electrical systems?
• How far must a ladder extend above the step-off point?
• What type of switch is designed to disconnect the starting winding from the circuit at 80% of full speed?
• Which device is used to connect an oil switch to a high voltage circuit?
• To calculate the area of a circle in circular mils, which formula is used?
• What happens to oil in an oil switch during an arc?
• What is the primary function of a rectifier in electrical systems?
• Capacitance opposes a change in which electrical property?
• What does the "X" indicated in the rating of a transformer signify?
• Which type of valve ensures that a hydraulic cylinder remains in place during a hose failure?
• How is the base plate on a footing typically leveled?
• What is the unit of measure for inductive reactance?
• Are "radial-vane," "concentric-vane," and "plunger" considered examples of the thermal type meter movement?
• Which unit is used for measuring capacitance?
• In the moving iron meter movement, what effect do the bars of iron in the radial vane exhibit when current flow increases?
• What must be done before applying a topical treatment for poison ivy?
• Which of the following describes the voltage in a 3-phase system correctly?
• What is a common indication of a pump rotating at excessive speed?
• Which of the following is NOT a method to ensure safety when working near energized lines?
• A good protective ground would typically have what range of resistance?
• Does the transformer rated at 2400X7200/12470Y-120/240 have a tap changer for dual voltage operation?
• What is the purpose of the potential coil being high in inductive reactance?
• What happens to a wire when it is cooled?
• Which device allows current to flow in only one direction within a basic meter movement?
• What device changes the direction of current flow through an armature?
• In which circuit type does the current flow instantly when energized?
• What is the inductive reactance of a 60 cycle circuit with a 39.8 mH inductor, rounded to the nearest whole number?
• What produces magnetic flux?
• What does a thermocouple produce when heated?
• What is a benefit of using the delta connection in three-phase systems?
• What does the term "phase displacement" refer to?
• What happens to the impedance in a coil as frequency increases?
• What is the main purpose of assessing the area of a circular mil in lineman practice?
• For poles that are 55 feet or longer, how far from the butt of the pole are brands placed?
• How many inches does an anchor rod typically extend above ground level?
• What is the inductive reactance of a circuit with an inductor of 20 mH at 60 cycles?
• What does the term 'coordination' refer to in relation to sectionalizing devices?
• How is impedance measured?
• What is the transformer coil voltage required to connect to a 12470 volt 3-phase 4-wire system?
• What does the term "Coefficient of Coupling" refer to in a mutual inductance transformer?
• What kind of transformer connection would generally ensure a neutral point in a system rated for 12470 volts?
• Can a delta-delta system with standard displacement be phased with another delta-delta system with alternate displacement?
• What is the unit of measure for inductance?
• What type of opposition to current flow is caused by either an inductance or capacitance?
• What protective device is used to interrupt a fault in an electrical circuit?
• What term is used for the electric power transfer efficiency ratio?
• What is the biggest advantage of a wye system?
• What characteristic of a ladder prevents electrical shock?
• What does the effective value of voltage typically represent?
• Is it an accepted practice to open the normal circuit load with a sectionalizer?
• In a fault condition, a crew is informed about two consumers reporting an outage. Which sectionalizing device would a lineman typically proceed to?
• A "phase to neutral" connection is often referred to as what type of connection?
• Is the transformer designed for wye or delta connection on the high side according to the (12470GrdY/7200-120/240) specifications?
• What is the ideal phase difference between the starting winding and the running winding?
• True or False: Electromagnetic meter movements may be classified as moving coil and moving iron.
• What is the prefix meaning one one millionth (1/1,000,000)?
• What type of skin damage occurs in a 2nd degree burn?
• Which method is NOT used to test for a de-energized line?
• What term describes the number by which the register reading is multiplied to obtain kilowatt-hours?
• Why is it important to use a metal base plate on footings?
• What factor necessitates the need for single-phase over three-phase oil switches?
• Is it considered standard practice to permanently install a line fuse on the source side of an OCR under normal conditions?
• What is a typical rating for a residential electrical service?
• What is the standard voltage for a typical residential service in North America?
• Should all poles within the pole line face the same geographic direction?
• What device is used to record the number of kilowatt-hours?
• In a transformer, what happens to the output current when the output voltage is lower than the input voltage?
• What is the required finish for ladders according to standards?
• What is the appropriate connection for a transformer rated at 4160/7200Y-120/240 when connecting to a 4160 volt 3-phase 4-wire system?
• Which type of motor typically cannot operate on both AC and DC?
• Why is the "fuzz" test considered unreliable?
• Which voltage is used for the phase-to-neutral in a typical 3-phase 4-wire system?
• For a meter to function accurately, which part is essential to detecting and responding to the electrical quantity?
• The formula for inductive reactance can be expressed as what?
• What is a common first aid treatment for exposure to poisonous plants?
• Which transformer rating can be connected to a 4160 V, 3-phase, 4-wire system?
• Which type of meter movement operates as a direct result of current flowing through a wire?
• Which of the following best describes how electrical energy flows in an electric circuit?
• Which of the following is true regarding the operation of hydraulic pumps?
• What is the term for not grounding the common connection of a wye high side of a three phase transformer bank?
• What kind of current is referred to as an eddy current?
• Which transformer connection is used for a transformer rated at 2400/4160Y-120/240 connected to a 4160 volt system?
• Which connection is required for a 120/240 3-phase 4-wire electrical system?
• In a wye system, one of the benefits is that it allows for what type of load distribution?
• What feature does an Oil Circuit Recloser (OCR) provide that helps enhance system reliability?
• What safety measure should be taken when working at heights of 10 feet or more?
• What type of current is indicated by the "Right Hand Rule" for motors?
• Which of the following is considered the biggest advantage of sodium vapor lamps?
• What does the burden refer to in relation to instrument transformers?
• In electrical circuits, what happens when the switch is opened in an inductive circuit?
• What is the effective value that voltmeters typically indicate?
• What is the primary purpose of grounding on the secondary side of transformers for consumers' premises?
• How should the stinger of a bee be removed from the skin?
• In a purely resistive DC circuit, how quickly does current reach its maximum value when energized?
• What is the correct procedure for installing protective grounds?
• In terms of compliance, which code should be followed where local regulations are not more stringent?
• What is considered the least possible displacement for a three-phase transformer bank?
• For poles that are 50 feet or shorter, how far from the butt of the pole are brands placed?
• A secondary rating of 240 3-phase 3-wire with corner ground will have what voltage values between phases?
• What is the function of a relief valve in a hydraulic system?
• What is the primary function of the reserve tank in a hydraulic system?
• For a wood transmission structure, what is the preferred grounding method?
• What is the low side coil voltage for the (12470GrdY/7200-120/240) 167 Kva transformer?
• What is the purpose of the specification 167 Kva in transformer ratings?
• What primarily governs the value of fault current in a system?
• In a 7200 volt 3-phase 4-wire system, what is the voltage value between phases?
• What is the phase to neutral value of a 12470 volt 3-phase 4-wire system?
• What is the impedance of a circuit with a 50 Ohm resistor in series and a capacitive reactance calculated as 30 Ohm?
• Why are O-rings typically used in hydraulic systems?
• If a transformer has a primary voltage of 12000 volts and a secondary voltage of 7200 volts, what type of transformer is it?
• Which voltages are available to ground on a 240 3-phase 3-wire system?
• Which physical property opposes a change in current flow?
• What does "static charge" refer to concerning de-energized lines?
• What is the purpose of applying grease on anchor bolts before pouring concrete?
• Is an inhibitor required to be applied on all aluminum connections?
• What is the primary application of circular mil in electrical design?
• Which of the following grounding methods is suitable for overhead transmission lines?
• What is the purpose of the 'protected device' in electrical systems?
• If a transformer is banked and connected wye on the low side, what system voltage would it yield?
• How is hydraulic fluid made to flow in the desired direction?
• Is it possible to deliver three-phase power using two transformers?
• What is the high side coil voltage for a transformer with a rating of 12470GrdY/7200-120/240?
• What is the primary role of the hydraulic filter in a system?
• What is the term for the variation in the time of use of appliances that results in lower maximum demand?
• For a transformer with 7200 volts on the high side and 120 volts on the low side, what is the voltage ratio of the transformer?
• What is the prefix meaning one one thousandth (1/1,000)?
• When measuring wire gauge in American Wire Gauge (AWG), how does circular mil relate?
• What can circular mils be used to determine about a wire?
• What connection is required on the low side of the transformer bank for a service rated at 240/480 3-phase 4-wire?
• 5000 mH is equal to how many Henries?
• Which type of conductor provides a greater opposition to changes in current flow?
• Which configuration allows for a standard phase displacement?
• What is the most readily available protective ground for a Wye distribution system?
• Which fault condition signifies that heavy current flows due to direct contact between line conductors?
• Why must a "sectionalizer" be on the load side of an OCR?
• Which of the following best describes the function of a sectionalizer?
• Which of the following best describes the inductance of two coils connected in parallel?
• What is the impedance of a circuit with 50 ohms of resistance in series with 30 ohms of inductive reactance?
• Which characteristic is not true for a 7200 3-phase 3-wire system?
• One hundred seventy-six ten thousandths Henries equals how many microhenries?
• The area attributed to a single circular mil equates to how many square mils?
• In electrical engineering, what does the term "impedance" refer to?