The Lineman's and Cableman's Handbook Practice Test

These questions are part of the practice quiz. Start practicing

• How deep should a ground rod be driven to reach sufficient grounding?
• Which task can be performed while lines are energized with hot-line tools?
• A wattmeter is essentially the combination of what two instruments?
• Describe the operation of a current-limiting fuse.
• Where should guy wires be installed?
• Which statement describes the order of installing protective grounds in a multi-conductor arrangement?
• What method is commonly used to perform a quick inspection after a sustained outage on transmission lines?
• Which of the following is an advantage of using DC transmission for underground circuits compared with AC?
• Which of the following is a component part of the electric distribution system?
• Why must the surface of high-voltage transmission-line conductors be protected from nicks, gouges, scratches, etc. during installation?
• Name the parts of an underground system.
• What is the primary purpose of a luminaire?
• Why are armor rods installed on some line conductors at the point of support?
• What describes an alternating circuit?
• Double crossarms are used at which crossings?
• What is the typical conductor material for Tri-Plex cable used in underground residential distribution secondaries and services?
• During the initial inspection, which item related to grounding is checked?
• Which term is defined as a source of light in street lighting terminology?
• Which component provides a direct current power source for control circuits in a substation?
• Which term refers to the portion of the distribution system that delivers power from the distribution transformer to the customer's service entrance?
• Which of the following describes a feature of a wire tong?
• During sagging, where are the targets placed?
• Which instrument is used to verify that a high-voltage circuit is de-energized?
• What is the primary role of protective relays in a substation?
• Which component allows a transformer to handle different primary voltages by changing the winding connection?
• Which step best ensures proper phasing before connecting two single-phase distribution transformers in parallel?
• Describe the operation of an oil circuit breaker.
• What defines electric current?
• Which is an effect of low voltage on residential equipment?
• In sagging operations, where should the transit or sag scope be mounted?
• Which type of circuit breaker uses a vacuum as the arc-quenching medium?
• Which of the following is listed as a common voltage for AC transmission lines?
• Describe the operation of a solid-material fuse.
• Which function is performed in an electric substation?
• Which item should be checked during the initial inspection of transmission lines to verify grounding quality?
• Why are spacers installed on bundled-conductor transmission lines?
• A wattmeter is essentially the combination of which pair of instruments?
• How does a metal-oxide valve-type lightning arrester operate?
• Which safety-related item should be checked during switch inspections?
• What is the typical service voltage for Tri-Plex underground secondaries and services?
• What are the typical secondary conductor sizes for Tri-Plex underground distribution cable?
• What is the correct order of operations for transmission-line tower erection?
• What best describes the operation of an elementary lightning arrester?
• What is the minimum clearance for the top of a duct run below street surface?
• The polymer suspension insulator is used to address which issue?
• Which function could include changing system frequency?
• What term describes illumination of a surface 1 square foot receiving 1 lumen uniformly distributed?
• What makes a good electrical conductor?
• How can the polarity of a transformer be determined?
• Insulators are typically fabricated from which materials?
• Which device is primarily used to interrupt and switch circuits in a substation after fault detection?
• Which of the following represents the inspection list for underground distribution switchgear?
• Which statement reflects an objective of line-clearance tree trimming?
• What is the primary role of insulators on power lines?
• Which is an effect of high voltage on residential equipment?
• Which item is checked during the initial inspection to assess structure integrity?
• Post-type insulators can be installed on circuits used for which of the following?
• What components control the light emitted by a streetlight?
• Which item is not listed as disaster response assessment data used to assess a storm situation?
• What does a voltmeter measure in volts?
• Which statement best describes streetlight maintenance scheduling and replacement?
• What is the minimum vertical clearance for attaching a low-voltage service to a building in areas restricted to pedestrian traffic?
• Why is Tri-Plex cable used for underground residential distribution?
• Which equipment provides communication and control signals over power lines in a substation?
• How is voltage adjusted in a distribution step-voltage regulator?
• When paralleling two transformers, what measurement confirms correct phasing before connecting the secondaries?
• What is the purpose of the distribution transformer installed on an electric distribution circuit?
• At what locations can bolted connectors be used to join line conductors?
• What does the Basic Insulation Level (BIL) indicate in distribution equipment?
• Which of the following is a stated use of a power transformer in a substation?
• What is the unit of an alternating current frequency?
• What is the purpose of a distribution transformer?
• What is used as the initial reference ground when starting protective-ground installation?
• Which of the following describes the normally used three-wire three-phase secondary voltages?
• Why are some distribution transformers manufactured with taps on the primary windings?
• What is the third step in the protective-ground installation sequence?
• What is the purpose of insulation shielding over the insulation of a high-voltage cable?
• Which method is used to check distribution transformer loading?
• When service wires cross an alley or street, what minimum clearance should be maintained?
• What are the distinguishing characteristics of transmission lines?
• What unit is inductance measured in?
• When testing a string of insulators with a high-voltage tester, which step identifies a defective insulator?
• What is the primary function of a voltage regulator in a distribution circuit?
• Which step begins the procedure for establishing a temporary protective ground on a cable in a dead-front padmount transformer?
• Which of the following is NOT a lamp type commonly used for street lighting?
• What is the rule for determining the setting depth for a pole to be installed in soil?
• Which of the following describes the normally used four-wire three-phase secondary voltages?
• What is the difference between a strain insulator and a suspension insulator?
• What precautions must be taken before cables are installed in a duct?
• Which statement best describes streetlight maintenance?
• Which statement correctly describes transformer polarity guidelines?
• In a three-phase four-wire system, what is the relationship between phase-neutral and phase-phase voltages?
• Which conditions normally occur when insulators are defective?
• What is the typical purpose of guy wires in pole structures?
• Which type of streetlight lamp requires ballasts?
• Which item is specifically checked for tightness during the initial inspection of transmission lines?
• Which of the following statements about capacitor bank maintenance are true?
• Why must the voltage regulator be in the neutral position before operating a bypass switch on an energized circuit?
• Which piece of equipment is used with a self-protected type distribution transformer?
• Where are double crossarms commonly used?
• What is an insulator?
• What is the purpose of a line-drop compensator on a voltage regulator?
• How is the operation of circuit breakers initiated?
• What unit is capacitance measured in?
• Which of the following is an advantage of compact sector cable construction as listed?
• Which protection type is used to determine distance to a fault on a transmission line?
• Which underground residential distribution arrangement is normally installed?
• In sagging operations, what is the final action after leveling the measuring instrument?
• Why are 'potheads' installed on cables?
• What is a primary reason for effectively grounding conductors during installation?
• In a four-wire three-phase system, what is a primary purpose of the neutral conductor?
• What is the minimum depth allowable for direct-buried cables operating in the 601–22,000 V range?
• Which type of splice can be used on line conductors under tension?
• Which of the following is a factor to consider when selecting line conductors?
• What is the maximum voltage to ground for grounded electrical systems installed with no deliberate separation between supply and communication cables?
• How are two energized circuits phased out using hot-line tools?
• What voltage range defines a primary circuit in high-voltage distribution?
• Which statement about transmission lines is true?
• Wood poles are classified by which criteria?
• What makes a good insulator?
• Harmonic voltages are defined as frequencies that are multiples of which base frequency?
• Where do typical distribution feeder circuits originate?
• If the secondary windings are Y-connected, which conductor is grounded?
• Which of the following are typical insulator materials?
• What are the high and low voltage limits for a 120V residential service?
• Which component is used to adjust the turns of the secondary winding in a voltage regulator?
• Which feature is a component of transformers used for underground electric distribution systems?
• What is the main function of distribution feeders in the electric distribution system?
• Which statement describes steel structures used for transmission lines?
• Which option is NOT a function of a power transformer in a substation?
• Why are disconnect switches installed in series with circuit breakers?
• Which of the following best represents the items to check when inspecting switches?
• Which statement is NOT listed as a fundamental essential for safe and competent tree-trimming operations?
• What is the primary role of a fuse in an electrical system?
• Which of the following is NOT an advantage of monitoring devices?
• What are the key steps in reconductoring distribution lines?
• Which of the following statements describes alternating current?
• In a circuit, what is a diode semiconductor used for?
• Which statement best describes a substation's switching in relation to power flow?
• What is the principal operating principle of an expulsion fuse cutout?
• How can the voltage on an electric distribution system be controlled?
• What is the primary use of a wire tong in hot-line work?
• Which device described uses an oil switch to interrupt and automatically reclose an AC circuit?
• Voltage regulation is defined as what?
• What is the proper end state after installing protective grounds on all conductors?
• In rigid steel transmission structures, how many legs are typical?
• What is the purpose of an electric substation?
• What term describes equal potential across the lineman and working area due to protective grounding?
• What is the first step in installing protective grounds after confirming the circuit is de-energized?
• What normally limits the capacity of a transmission line?
• Which device provides reactive power to help regulate voltage on a distribution system?
• Which two distribution patterns are commonly used in street lighting?
• What is the primary purpose of installing a fuse in a circuit?
• Which device is used to isolate a fault by melting a fuse element and interrupting current?
• Which of the following is NOT typically listed as a component part of the electric distribution system?
• What is the correct sequence for using a transit to complete sagging operations?
• Sub-transmission lines between which voltage range are commonly associated with wood pole structures?
• For a 3-phase distribution transformer bank, where should the grounded point be located?
• What is the purpose of the electric service?
• What is the maximum distance permitted between the bonds of effectively grounded electric cables to communication cable shields if installed with random separation?
• Which of the following is listed as a common set of voltages for AC transmission lines?
• What is the minimum recommended depth for setting a pole?
• Which of the following statements about the range of voltages for AC transmission lines is correct?
• Which statement best describes wood pole usage for lines?
• What function do circuit breakers installed in electric substations serve?
• What is the BIL value for a 35 kV distribution level?
• AC transmission lines generally operate within what voltage range?
• During the initial inspection of transmission lines, which item is checked specifically for conductor-related clearance?
• What is the primary function of a lightning arrester in a power system?
• What does atomic theory state?
• What unit is used to measure the frequency of alternating current?
• Which action verifies de-energization before grounding a cable on a dead-front padmount transformer?
• Post-type insulators can be installed on pole materials?
• Which of the following is a typical substation component used to measure or indicate voltages and currents?
• What happens when the fuse of an indicating enclosed cutout is blown?
• Why is phase sequence checked when replacing a three-phase transformer installation?
• What is another name for a wire tong?
• During protective-ground installation, which conductor is connected second using a hot-line tool for vertical installations?
• In underground residential distribution, which arrangement is used to mount transformers at grade along front lot lines?
• Which is an advantage of using crossarms on a subtransmission structure?
• When is it necessary to insulate a guy wire?
• What variation range do distribution regulators generally provide around normal line voltage?
• What is the service configuration for Tri-Plex underground residential services?
• Which of the following is NOT a listed use for vaults in an underground system?
• Which BIL rating corresponds to a 25 kV insulation level?
• Which term is described as an attachment for a pole to support a luminaire?
• Where are strain insulators used?
• What is the most common voltage for underground residential distribution circuits?
• What purpose do vaults serve in an underground system?
• Which of the following is a primary requirement for establishing an adequate protective ground?
• What protection functions are provided by protective relays installed in a substation?
• To minimize secondary voltage drop, where should transformers be installed relative to the load?
• Direct-current transmission lines are typically used in which scenario?
• How are protective grounds installed to create the man-shorted-out condition?
• When is it desirable to determine the phase sequence of an AC circuit?