Journeyman Lineman (JL) Verbal Practice Test

These questions are part of the practice quiz. Start practicing

• Which color corresponds to Class 3 rubber gloves?
• Which option represents a 2.5% increase above 100%?
• What is fuse coordination?
• What is a cable tray?
• What does it mean when a line is described as "dead"?
• In a three-phase system, the angular difference between any two phase voltages is:
• What percentage must a crane be set up to run?
• Which statement best defines resistance?
• What do AWG and KCMIL stand for?
• What is cable insulation?
• Which device detects current imbalance and trips to prevent electric shock?
• What is the difference between a transformer's secondary and its service?
• What is a common?
• Which statement best defines impedance?
• What does a MAC look like?
• What is a neutral?
• Which condition would cause corona on high-voltage conductors?
• Which item is NOT listed as part of a tailboard briefing?
• Which statement about a line described as "hot" is true?
• Which term describes the opposition to current flow due to inductors in AC circuits?
• What is three-phase phasing?
• What is a Ground Bank?
• Which action completes the safe de-energization of the old transformer after paralleling?
• What does the three points of contact rule apply to?
• Which sequence describes proper fuse coordination in a distribution system?
• Voltage drop is the decrease in voltage from the source to a load along a circuit.
• What is safety factor?
• What is a transformer?
• What are common types of tap changers?
• What does three points of contact mean?
• Which statement correctly describes corona?
• What does conductor gauge indicate?
• What is switchgear?
• What is a neutral?
• Which statement about Working Load Limit is correct?
• Where does corona occur?
• Which quantity measures the opposition to the flow of current in a material?
• Define voltage drop.
• What does the dashed line in a schematic usually indicate?
• In glove ratings, how do the proof test voltage and maximum use voltage compare?
• What is a phase in a three-phase system?
• Which statement best defines breaking strength?
• When bucket placement is not possible on a congested pole for voltages below 7,500 V, which method is used?
• In a three-phase system, how are the voltages phased relative to each other?
• After replacing a single-phase transformer, the voltage at the customer's panel is low. What should you check?
• On a customer meter panel, the top right is usually which leg?
• During phasing setup, what does the BT (battery test) verify?
• What is the purpose of grounding?
• Which parameter is not typically specified by utilities for protective grounding?
• What is sag in overhead lines?
• HDPE stands for and where is it used?
• What is a megger?
• Which two factors are important to know when hanging grounds?
• What is the main purpose of a load center in a residential electrical system?
• What is a grounding conductor?
• What does L stand for in ELI?
• What is a ground?
• What is cold load pickup?
• What is meant by a load center?
• What is the purpose of capacitors in power factor correction?
• What does WLL stand for?
• Define dielectric testing in simple terms.
• Which instrument is used to measure leakage current to determine insulation condition?
• What does 'permitted exposure' refer to in safety language?
• How many degrees can you set a digger?
• Which device should be used to test air quality and gases in an underground vault, and kept ready before entry?
• Johnny Ball is used for what purpose?
• Grounding is intended to stabilize voltage and provide a fault path.
• A neutral conductor in a polyphase system is typically at or near earth potential and carries current back to the source.
• If two crews are operating on the same line with their own lockout/tagout, what should you do?
• Which of the following describes the total opposition to alternating current, including resistance and reactance?
• Red rubber gloves correspond to which class?
• What is a ground used for?
• Which description best defines dielectric testing?
• In overhead line terms, which statement best defines the span?
• When replacing a transformer and keeping the customer's power on, which practice helps maintain service?
• Can you parallel a Delta-Delta bank with a Wye-Delta bank?
• Which option describes the effect of more turns in the primary winding on the secondary voltage?
• Which term describes two or more circuits sharing the same neutral conductor and having a common point?
• What is breaking strength?
• What is the shelf life of rubber gloves?
• Which device should be calibrated and used to test air quality in an underground vault?
• What is a tagout?
• Which action is performed first when using a phasing set?
• What does bonding mean in electrical safety?
• What is the standard change-out interval for rubber gloves and sleeves?
• Which statement about AWG is correct?
• What is a neutral conductor?
• Which protective ground size can withstand 21 kA for 15 cycles?
• What does the solid line in a schematic usually indicate?
• Megger measures insulation resistance by applying high voltage?
• What is the maximum use voltage for Class 4 gloves?
• What is the difference between a tagout and a lockout?
• What is cold load shedding?
• In schematic diagrams, which line type typically represents a direct electrical connection that forms part of the wiring path?
• When defining protective ground requirements for lines coming out of a substation, which items should be specified?
• Which combination is listed as a type of tap changer?
• Which protective ground size has the highest continuous current-carrying capacity?
• How many settings on old tap changers?
• Define grounding.
• What is a residual current device (RCD/GFCI) designed to do?
• What does safety signage accomplish?
• What is a circuit breaker?
• In the phasing process, what does a zero deflection reading across the open points of a double dead-end indicate?
• What percent change per tap setting applies to the old system described?
• What must you verify about the phasing meter and live line tools before testing?
• Which statement best describes ground substance?
• Which term describes a current-carrying conductor that returns imbalance back to the source at near ground potential?
• During phasing, why are color phase tapes applied to each phase?
• Which statement is true about a common neutral?
• What is checked to verify a proper voltage when paralleling a new transformer with an existing one?
• What is the purpose of a tap changer in a distribution transformer?
• What is the purpose of extending rubber glove length?
• What is the maximum use voltage for Class 1 rubber gloves?
• What is clearance in overhead line work?
• When paralleling a Delta-Delta bank with a Wye-Delta bank, what issue prevents proper paralleling?
• Why should a ground be established on any potential path that could allow electricity to leave the circuit?
• Why is the wire smaller on the primary side than the secondary side?
• What is the proof test voltage for Class 2 rubber gloves?
• What does a tag on equipment indicate?
• Why are lockout-tagout procedures used during maintenance work?
• What is the maximum use voltage for Class 3 rubber gloves?
• What does it mean when a line is described as "hot"?
• Which statement correctly describes a common neutral?
• Which measurement does a Hipot tester primarily perform to assess insulation?
• What is a ground fault?
• For insulated underground cables and conduits, which material is commonly used?
• Which description best matches a ground conductor?
• What does C stand for in ICE?
• What happens if you open a bayonet fuse in a transformer?
• Which statement describes a MAC (mutual accessory conductor) in protective grounding?
• Which term describes the opposition to current flow due to capacitors?
• What does the resistor symbol in schematic diagrams typically represent?
• Arc flash energy is defined as which of the following?
• What is a conductor in electrical terms?
• Which steps are used to properly test rubber gloves?
• During paralleling, what indicates it is safe to continue after connecting the new XMR?
• What is the equipment grounding conductor commonly called in electrical codes?
• Which statement best defines voltage?
• What do tap changers do?
• Define a span in overhead lines.
• Which sequence outlines the steps to remove a recloser?
• A protective grounding system must be capable of conducting what?
• Which statement correctly describes the relationship between proof test voltage and max use voltage for rubber gloves?
• Which term describes two or more circuits sharing a common point?
• What is a fault in electrical terms?
• Before entering an underground vault, which action is essential?
• Which statement best describes the primary purpose of bonding in electrical safety?
• Which property is required for protective ground cables?
• What does dielectric strength refer to?
• What is a neutral-grounding resistor used for?
• What is the proof test voltage for Class 4 gloves?
• What is the purpose of a job briefing?
• How should you place a regulator transformer in neutral when required?
• What is a MAC?
• What does arc-rated PPE mean?
• What is a MAC used for?
• What is the proof test voltage for Class 1 gloves?
• What is the purpose of a hazard assessment in the field?
• In a transformer, which statement about current on the high-voltage and low-voltage sides is correct?
• Which component is used to limit fault current during ground faults?
• In a layout, which statement best describes cable tray usage?
• What does high-potting (Hipot) mean?
• Which statement best defines current?
• Which statement best describes impedance?
• What does arcing refer to?
• Which statement best differentiates lockout and tagout?
• What is lockout?
• What is an insulator?
• What is verbal authorization in the field?
• What is the function of a ground conductor?
• What is a protective ground?
• Why are capacitors placed on power lines in electrical systems?
• What is corona?
• A device that transfers electrical energy between circuits and changes voltage levels via electromagnetic induction is a:
• What is the difference between gauge and AWG?
• In electrical terms, what does ELI indicate?
• What safety step must be taken before adjusting a tap changer?
• What is arc flash energy?
• What is the main purpose of PPE?