North Carolina Public Utilities License Practice Test

These questions are part of the practice quiz. Start practicing

• What is a guy in the context of pole setting?
• Which type of fuse links must fit into a 7/17-inch diameter hole?
• What is the maximum change in direction permitted in any plane lengths of straight, rigid conduit without the use of bends?
• What should the tension in bottom conductors be in relation to the top conductors?
• Which component is critical in the controlling of electrical flow in a rectifying device?
• Which type of roof would be the easiest to maintain on a utility pole?
• What typically limits the capacity of conductors in a transmission circuit?
• Transmission structures are typically set in place using what equipment?
• What voltage defines the primary function of high-voltage transmission lines?
• What does a head guy refer to?
• Why is clearance important for service-drop wires in pedestrian areas?
• What is the normal inside vertical height of a two-way manhole?
• If 120/7620 x 10/1 equals what primary current?
• What does underground cable shielding prevent?
• What is the typical line voltage range mentioned for electrical systems?
• What causes radio interference on high-voltage DC transmission lines?
• What is the minimum depth for grounding rods to ensure they are in perpetually moist earth?
• Where can underground cable circuits originating in pad-mounted switchgear be grounded?
• What characteristic does a clean, dry polypropylene rope possess compared to other types?
• What equipment can be used with the head of a hydraulically operated tool for working on energized lines?
• What is the clearance required for voltages between 345,000 to 362,000 volts?
• What aspects does the Unisagwatch calibration take into account?
• What is the most common method used to set poles?
• What is the purpose of roofing poles?
• What is the function of cable cutters in the splicing process?
• How deep should the top of a conduit system be located below the top of the rails of a street railway?
• What device indicates that a high-voltage line is de-energized?
• In high-voltage systems, what is a common voltage range needed for transferring electricity over long distances?
• What is the recommended method for pulling poles?
• What is the primary function of a distribution transformer?
• What is the role of safety hats in electrical work?
• What role do coupling capacitors serve in electrical transmission?
• What type of polarity is standard for all single-phase distribution transformers?
• What shape is the core of the most commonly used transformer design?
• What must be done to a line before it can be worked on?
• Which side of the pole is referred to as the concave side?
• What key features does a distribution transformer include?
• What type of maintenance is essential for ensuring the proper functioning of shield wires?
• During a Lamp Test for Polarity on a Three-Wire Service, which wire causes the lamp to burn?
• What is the purpose of brushing the aluminum conductor surface before applying an inhibitor-type compound?
• Under what circumstances should the boom of the line truck not be used?
• What is a key advantage of properly roofing utility poles?
• Which of the following is a common practice when handling cables in a manhole?
• What is the standard wire size often used for ground connections?
• What type of test should rubber gloves be given daily by linemen or cablemen?
• In which scenario are head guys typically used?
• What is the importance of high-frequency voltages in coupling capacitors?
• In a shell-type transformer, where are the coils placed?
• What component is used in oil switches to open circuits automatically during overloads?
• What is the minimum clearance for service-drop wires in areas restricted to pedestrian traffic?
• What additional action can be taken if resistance is too high when using a grounding rod?
• The main purpose of adding capacitors to a circuit is to:
• Which of the following is NOT mentioned as a common conductor covering?
• What is the minimum size of the ground wire used?
• In electrical systems, sagging of conductors is typically addressed during which phase?
• What device provides continuous indication of ground resistance?
• What size conductor is typically required for underground services to new homes?
• How can the tension in a conductor be measured?
• What is a thyristor semiconductor primarily used for?
• What is vital for ensuring precision during the calibration process of the Unisagwatch?
• During tension stringing, what element is critical to maintaining conductor elevation?
• What voltage is typically used to test the insulated stick portion of hot-line tools?
• What does the term "vault" refer to in the context of manholes?
• What must not happen to the conductor while removing cable insulation?
• Under what condition is a flat roof type considered adequate for poles?
• Which of the following describes the purpose of conducting phasing out operations in utility work?
• Which type of rope is considered an insulator?
• Where does the lineman make the last connection when installing protective grounds?
• Why are the core and coils of a large capacity transformer typically placed in an oil-filled tank?
• What is the typical range of generation values (voltage) for electrical power?
• What does the Unisagwatch device provide direct readings of?
• What purpose does spacing serve between cables in a manhole?
• What is the primary purpose of a guy wire?
• What should ties for pin-type insulators achieve?
• What is the purpose of tension stringing in electrical installations?
• Where should a distribution transformer be primarily installed?
• What is an essential factor for ensuring personal safety in electrical work?
• At what location is voltage raised to transmission levels?
• What is the approximate insulating value of a standard safety hat?
• What is commonly used as a conductor covering?
• What is the function of a light-duty strain carrier (rocker-arm type)?
• At what point do sagging operations begin during the installation process?
• In terms of utility structure placement, what should one consider regarding the surface conditions?
• Different ratings of transformers are known to have what?
• How deep should the top of a conduit system be below the top of the rails of a railroad?
• What is the line voltage and conductor size for typical overhead AC three-phase transmission lines?
• What is an important safety consideration when using hot-line tools?
• Why is aluminum conductor often preferred in electrical applications?
• How is a neutral conductor in a power system typically characterized?
• What is the minimum clearance required for voltages between 46,100 to 72,500 volts?
• What is the primary use of wire tongs in electrical work?
• What is the consequence of not clipping in conductors promptly after sagging?
• How often should bonding be provided between supply conductors and communication shields?
• What does limiting radio interference help to achieve?
• What feature do capacitors for use on electrical lines have?
• What is the role of a dynamometer in the process described?
• At what voltage are hot-line tools typically factory tested?
• What is the key purpose of conducting an air test on rubber gloves?
• When should conductors and shield wires be clipped in after sagging is completed?
• What is the function of grounding a line before working on it?
• What is expected of the ties used for tying conductors to ensure safety?
• What does the term "Frequency" refer to in electrical terms?
• Under what conditions must all high-voltage electric transmission and distribution circuits be installed underground?
• What happens to the power factor when voltage and current are out of phase?
• Which roofing types are commonly used when roofing poles?
• Which of the following is a situation where piking might be used?
• How is the operation of circuit switches initiated in DC circuits?
• If a grounding rod shows resistance above 25 ohms, what is the recommended action?
• What factors limit the lengths of sag sections in overhead conductors?
• In underground distribution, what is necessary for protecting cable components?
• How should poles be oriented when placed next to poles supporting long spans?
• What type of manholes are used for the protection of transformer and network protector equipment?
• How are new safety helmets tested for insulation?
• Why is the proper choice of a connector considered important?
• What is the purpose of the cable insulation shielding?
• When should a cable exposed at a fault location be handled?
• What devices can transformers be equipped with for operational efficiency?
• What does it mean to ground a circuit or apparatus?
• What is the required burial depth for supply conductors or cables operating at 601 to 22,000 volts?
• Where are splices normally completed when underground ducts are used?
• What is the frequency of the AC power generated in the United States and Canada?
• What is a common safety practice before using electrical gloves?
• Why is it important to coat the brushed aluminum conductor with an inhibitor-type compound?
• What is the purpose of ground wire molding?
• A transformer’s efficiency is most adversely affected by:
• Why is it important to identify the correct cable before beginning work?
• What does AC Live-line Work Minimum Approach Distance refer to?
• What voltage threshold do new helmets achieve according to safety standards?
• What should be done if the resistance of a grounding rod is not well below 25 ohms?
• At what height should service supports be mounted?
• What is one characteristic of the face of a pole?
• What is the primary purpose of training cables on the manhole wall?
• What should the end goal be when completing a splice?
• What does cable insulation shielding protect against?
• What should be the state of capacitors after 5 minutes of disconnection?
• What is the minimum separation required between supply and communications facilities in joint-use manholes and vaults for voltages between 15,001 to 50,000 volts?
• What typically varies depending on the height and length of the wall in manholes?
• Where are transmission substations primarily located?
• What is defined as the transmission level voltage?
• Why is it important to check rubber gloves daily?
• Under what condition is the Power Factor considered to be unity?
• How far from the suspension of dead-end points should all splices in transmission-line conductors be made?
• What is the primary method for setting H-Frames?
• What is the function of the trip coil in an oil switch?
• How can the measuring of sag be conducted for small sag situations?
• What is one method to improve a low power factor of below .80?
• In electrical safety, what does the term 'maximum use voltage' refer to?
• What type of hazard do rubber gloves help protect against?
• What is the purpose of using various taps in the windings of distribution transformers?
• What device is used to easily measure the resistance of ground lines in service?
• Which of the following best describes the purpose of thermal conditions in transmission circuits?
• Where do grounded static wires for transmission lines originate?
• What is the purpose of an elastomeric damper?
• What is the piking method in pole setting?
• The primary purpose of a fuse link is to protect against what condition in electrical circuits?
• What is the typical residential voltage configuration in North Carolina?
• What is the potential risk of improperly nicking a conductor during installation?
• When is phasing out necessary in electrical work?
• What feature is designed to protect a distribution transformer from lightning?
• How long should you wait before working on a disconnected capacitor for safety?
• What application has seen the use of two-pole H-type structures?
• What determines the capacity of a distribution transformer?
• When pulling bundled conductors, how are they typically managed?
• What is the maximum use voltage for Class 2 gloves?
• What purpose does a cable spear serve in electrical work?
• What is the approximate weight of the head of a hydraulically operated tool used for compression splicing?
• Under what conditions is the Unisagwatch particularly suitable for use?
• What component of safety gear is tested for their insulating capability against stated voltage?
• What should be checked during a visual inspection of rubber gloves?
• What is the function of slant cut and gable roof types on poles?
• What is one of the primary risks associated with live-line work?
• What does a shield wire do in electrical installations?
• What is the risk of having insufficient setting depth for a utility pole?
• What is the recommended spacing between cable racks adjacent to a proposed cable splice?
• What is the term for surface damage identifiable by black deposits on a conductor?
• What is a primary factor that contributes to the stability of flexible towers?
• How deep should a 40-foot pole be set according to the setting depth rule?
• What is a common issue with measuring sag during installations with unusually small sags?
• What device is used to check if each line conductor is de-energized before installing protective grounds?
• How does a lineman or cableman identify the cable to be worked on at the pad-mounted transformer?
• How much straight cable should extend beyond each end of the splice?
• What is the maximum length of a sag section typically allowed?
• In three-phase transformers, what does ensuring that the phase sequence is not changed help with?
• What is one purpose of determining the phase sequence in a three-phase system?
• What material is not typically used as a conductor covering in electrical applications?
• What aspect of a transformer is directly related to its design temperature?
• Most electric energy generation occurs at voltages lower than what threshold?
• What is the minimum required depth for a ground rod installation?
• What is a recommended practice when closing a fuse cutout?
• Which of the following is true regarding service-drop wire polarity?
• What is often included in the features of a protective link for a distribution transformer?
• Why are Power Thyristors being integrated into some step voltage regulators?
• What is the rule for determining the setting depth of poles?
• Conductors can be connected for parallel operation when what condition is met?
• What is the recommended pole hole diameter for adequate tamping equipment space?
• What happens if a grounding rod is not driven deep enough?
• At what location can underground cable conductors terminating in pad-mounted transformers be grounded?
• What is the minimum grade required for conduit runs to ensure drainage into the manhole?
• How is Power Factor calculated?
• What is the role of power transformers in transmission substations?
• What is the purpose of a compression sleeve connector in electrical systems?
• How many suspension units are typically required for a string of conductors?
• What voltage level can a properly maintained Class 2 glove handle?
• What should be taken into consideration when pulling a pole?
• Which of the following describes the core's function in a transformer?