Assessment for Lineworker Progression (ALP) Practice Test

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• What is the difference between a fuse and a circuit breaker regarding interrupting capacity and reset capability?
• When working aloft on 12kV lines, which of the following crew combinations is NOT allowed?
• When do you inspect and wipe clean all insulated portions of aerial lifts?
• Define power factor and explain why utilities encourage high PF.
• How is voltage drop calculated for a conductor with current I, length L, and impedance per unit length Z′ in DC conditions?
• What color is Specification No. 4 rope described in the weather-muddy scenario?
• In a single-line diagram, what does a transformer symbol with two windings and a core line indicate?
• With R = 5 Ω and net reactance 12 Ω, what is the impedance angle θ?
• Which of the following is the most common protective device installed on distribution lines?
• A transformer has a turns ratio of 2:1 (primary to secondary). If the primary voltage is 480 V and the load on the secondary draws 50 A, what are the secondary voltage and the ideal primary current?
• In the lifting operation described, what is the height of the pole?
• A 10-20 degree vertical strain on a gin reduces the Working Load Limit by 50%. Which statement is true?
• Compared to Category 1, Category 2 PPE typically requires additional protection such as a hood.
• What is the primary purpose of Lockout/Tagout (LOTO) procedures?
• To prevent unbalanced voltages when reconnecting conductors to a circuit, reconnect the ______ before picking up the load.
• How do you compute fault current using Thevenin equivalent?
• Where is the common neutral normally constructed in a distribution system?
• How is fault current calculated in a simple system with a fault at the transformer secondary, and why does tap-changing matter?
• If a liquid-filled fuse has been used on a transformer, which fuse should be used to replace it?
• If you see arc-proof tape that could contain asbestos, what do you do first?
• Which of the following could cause an underground fault?
• Which hazard-mitigation option for three-person rubber glove work from an insulated platform contains an error?
• Outline the standard Lockout/Tagout (LOTO) procedure steps in the correct order.
• Which statement correctly contrasts NEC and NESC?
• Before operating the transfer switch on a booster bank, you must visually inspect the transfer resistor for any damage. If any sign of damage is found, what must you do?
• Choking a wire rope sling reduces the working load limit by what percent?
• When establishing an EPZ and you encounter foreign grounds in the work area, what should you do?
• Why do utilities prefer customers to maintain a high power factor?
• In an AC circuit with resistance R, inductive reactance X_L, and capacitive reactance X_C, how do you compute the impedance Z and the phase angle θ?
• You are stringing a 1,000-foot span of conductor, and your current tension is 6,800 pounds. What will happen to the sag if you decrease the tension?
• During a lifting operation for the 1,000-lb regulator, how many workers should be in the bucket?
• When deciding whether to insulate a conductor or use bare copper in a given environment, which factors should be considered?
• What is the difference between instantaneous and time-delay elements in protective relays?
• What is the maximum load capacity of a temporary pole-mounted work platform?
• What is the correct procedure for handling rubber gloves that fail the inspection?
• If, while positioned to work on a pole, your left arm could contact another phase that is not tied to your personal ground, what is the best action to take?
• What is the purpose of conductor insulation rating and how does it relate to ambient temperature and ampacity?
• Which statement defines Class I switching device?
• Which Class must never be used to energize lines or equipment de-energized automatically?
• After you have identified marks at a non-critical location that indicate underground facilities are within 24 inches of the site for a new pole, you begin the excavation by
• What is the appropriate first step to take when using a voltage detector of any kind?
• When checking voltage on a three-phase service, which meter or tester should you use?
• Thevenin equivalent usage in protection coordination.
• In a basic schematic, identify these symbols: a zigzag line, a triangle with a line, and a break contact switch.
• In the hoisting scenario described, what factor most directly contributed to the accident?
• When planning grounding device selection, you should:
• What is the maximum number of phases to be worked at any one time on an energized conductor when using multiple aerial lifts to rubber glove on primary circuits at 5kV to 21kV?
• Why is it important to inspect insulated portions of aerial lifts just before performing high-voltage work?
• What should you do first if you observe arc-proof tape that could contain asbestos?
• What is the Minimum Approach Distance (MAD) for a conductor energized at 240V when wearing Class 00 rubber gloves and leather protectors?
• When installed correctly, which PG&E approved grounding method provides the maximum level of protection?
• An S&C underarm side-break switch uses which attachment type for load-break capability?
• Why are fuses installed on primary distribution lines?
• Which description best captures the purpose of system protection within electric power systems?
• How can you ensure that the length of the assembled rigging setup is not too long or too short to lift the equipment to the correct height?
• How often must PG&E air test instruments be calibrated?
• Which items are inputs to arc-flash incident energy calculation and what is computed to determine PPE?
• When switching from rubber glove mode to hot-stick mode, you cannot remove your gloves until you have done what?
• What do Arc-Flash PPE Categories 1–4 represent?
• Which consideration is most critical as you develop your rigging plan?
• A 13.8 kV primary with a 3:1 turns ratio feeds a load. What is the secondary line voltage?
• As part of place-keeping on a switching log, how do you indicate you have started an operation?
• Why is conduit fill calculation necessary and how is it carried out?
• Which statement best describes the function of a voltage regulator?
• After applying source grounds, what safety measure is typically required at the immediate work site?
• How do you calculate three-phase apparent power S given line-to-line voltage and line current?
• In underground systems, which is the preferred method for identifying phases to ensure correct connection during maintenance?
• Which factors affect conductor ampacity in distribution work?
• Failure to follow specifications for energizing the regulator may result in
• What is the power factor in terms of real and apparent power?
• How often should a hot stick be waxed?
• When inspecting live-line tools, they should be free of which issue that would indicate unsafe condition?
• You are moving a conductor from an old pole to a new pole and need to raise the conductor 10 feet. Which of the following is NOT a safety consideration?
• What is the first consideration when grounding electrical equipment?
• What is the primary purpose of installing fuses in a feeder circuit?
• To prevent transposing wires when de-energizing a service, how should you proceed?
• In a three-phase system, the line-to-line voltage V_LL is defined as the voltage between what?
• Which device provides line sectionalizing and coordinates with adjacent protective equipment?
• Referring to the circuit map, which two devices would you select as clearance limits when replacing transformer T-21760?
• What considerations govern arc-flash boundary and PPE selection in NFPA 70E?
• How does the turns ratio of a transformer affect the secondary voltage V2 and secondary current I2 relative to the primary values V1 and I1?
• How does a simple voltage divider work and where might it be used in linework?
• If a transformer has turns ratio N_PRI:N_SEC = 2:1 and a secondary impedance of 10 Ω, what is the impedance referred to the primary?
• Define short-circuit current and why protective devices must be coordinated to clear faults promptly.
• In rigging planning, which factor most directly affects safety?
• What is the difference between neutral grounding and bonded grounding in distribution networks?
• In which of the following situations do you use a phase rotation meter?
• Which system is typically used to remotely activate equipment such as a switched capacitor bank?
• Which configuration describes the coil connections when a delta connection is installed?
• What is the difference between grounding and bonding in electrical systems?
• Fuses have designed ampacity failure points. Which condition can cause a fuse to melt?
• During hoisting a 1,000-pound transformer with two parts of line, a 10-20 degree vertical strain reduces the WLL by 50%. Which gin is appropriate for the lift?
• Using the boom gauge, what is the minimum required boom angle to lift a 1,000-lb regulator onto a 40-ft pole with two workers in the bucket?
• Which device is primarily used for line sectionalizing and coordinating with adjacent protective equipment on a distribution line?
• What must you look for when inspecting a temporary pole-mounted work platform?
• In a DC circuit, a 12 V source is connected across a 4 Ω resistor. What is the current?
• How does ambient temperature affect conductor ampacity, and what do derating tables do?
• What is the purpose of proper device coordination in the context of SCCR?
• What is the primary purpose of a line recloser on a distribution feeder?
• Which limitations should be considered when using hot-stick switching?
• The insulating principle is defined as _______.
• Why is it important to reposition the bucket often during work?
• Explain loading diversity and its impact on equipment sizing.
• What is an equipment grounding conductor (EGC) and what is its function?
• Arc-flash boundary is established based on incident energy calculations or tables. Which of the following factors influences its value?
• After applying source grounds, what else is usually required at the work site to limit voltage exposure to the employee?
• What is a megger test, and what does a low insulation resistance indicate?
• The preferred marking for phase designation in an underground system is ____.
• What should be done if additional employees arrive at the job site, and the job is already in progress?
• On a temporary pole-mounted work platform, what is the maximum number of workers allowed?
• A fiber hoist that is connected to or supporting an adjacent phase at 17kV should be considered as what in terms of electrical safety?
• Explain the importance of clearance barriers to maintain a safe distance from energized lines, and name one method to enforce it.
• Which formulas correctly define real power, reactive power, and apparent power in an AC circuit, and how is power factor defined?
• If Specification No. 4 orange nonconductive rope becomes muddy in bad weather, what should you do?
• Dead-end and splice definitions and safety significance.
• Define minimum approach distance (MAD) and how it is determined.
• Who is qualified to be a grounding observer?
• Which statement correctly defines Class II switching device?
• Which standard provides the tables used to determine arc-flash PPE categories?
• In addition to being old and corroded, switches will not always operate properly or may not operate at all because they are
• What is the safe minimum approach distance (MAD) when working on equipment around 599 volts?
• When preparing the cables for landing at the termination can, what must be removed from the conductor with a wire brush to ensure a good electrical connection?
• What are two independent methods to verify a circuit is de-energized before work?
• You are supporting 1,200 feet of 2,300 kcmil conductor using a 3/8-inch wire rope sling. The sling has a rated capacity of 2,400 pounds. The conductor weighs 2,180 pounds per 1,000 feet. The sling failed, dropping the conductor and damaging the tower. Which of the following conditions most likely caused this accident?
• Which equipment provides line sectionalizing, circuit protection, and coordinates with other adjacent protective equipment?
• When installing a delta connection, how are the coils connected?
• You are working on a conductor energized at 240V, wearing Class 00 rubber gloves and leather protectors. What is the Minimum Approach Distance (MAD) under these conditions?
• Why is hot-stick switching used in linework, and what are its limitations?
• Fault duty is defined as which of the following?
• NFPA 70E PPE is rated for arc energy and must balance protection with what?
• Beyond arc-flash energy, which factors influence PPE selection?
• What is the difference between a short-to-ground fault and a short-to-neutral fault?
• How is a common neutral system normally configured?
• Which of the meters or testers listed has fuses that may need replacement?
• Bonding connections are used to ensure exposed conductive surfaces share the same potential to reduce shock risk.
• A common reason a switch might fail to operate besides being old and corroded is
• Which statement best describes the recommended rigging length verification during a lift?
• What should be used with hot sticks in heavy rain?
• Which of the following is the correct definition of system protection?
• Facilities adjacent and/or parallel to energized circuits, such as: de-energized busses, conductors and metallic structures (lowers), present what type of electrical hazard?
• Explain delta vs wye connection voltage relationships and when each is used.
• Which of the following is a backfeed source?
• Which statement best describes an Application for Work?
• You have visually inspected a hot stick and discovered the quick disconnect fitting has damaged bonding material. What should you do?
• After discovering a dangerous situation, you have called for emergency services, your supervisor and the Distribution Operator (DO). What else must you do before emergency services arrive?
• If the circuit has R = 5 Ω and net reactance X_L − X_C = 12 Ω, what is the impedance magnitude Z?
• Before operating a 200-amp Load-break separable connector, what is the first requirement?
• The multi-point grounding method includes source grounds and
• What is the recommended action when underground facilities are identified within 24 inches of the excavation site and daylighting has not yet occurred?
• After completing the switching operations on a switching log, the times the operations were completed must be communicated to whom?
• In a simple voltage divider with two resistors in series, how is the output voltage across the second resistor determined?
• Arc-flash incident energy is measured in which units?
• When installing rubber protective equipment, which conductors and apparatus receive devices first?
• When constructing a riser, the preferred location for installing a riser on a pole is
• Arc-flash PPE requirements are determined by which factor?
• A 24 V source feeds a 6 Ω load. What is the current and power dissipated in the load?
• In a balanced three-phase system, the total real power is given by which expression using V_LL, I_L, and PF?
• In an ideal transformer, what happens to the apparent power S as load changes?
• Arc-flash boundary determination using tables.
• What does it mean to refer impedance to the primary side of a transformer, and why is it done?
• In a balanced three-phase system with a wye connection, how is phase voltage related to line voltage?
• Which statement best describes a healthy insulation measurement when using a megger test?
• Fault duty can be defined as
• You are grounding a dead-break transformer under the supervision of a Qualified Electrical Worker (QEW). You tested the cable, and the voltage detector indicates the presence of voltage. What is the appropriate action to take?
• How do you ensure selective coordination of protective devices during a fault?
• What is the first step when installing personal grounds?
• If the PIC suspects the load on a 200-amp load-break connector exceeds its operating limits, what must be done before operating?
• Standard capacitor controls are used to set up which of the following sets of parameters?
• Which substation equipment uses load tap changers (LTC) to keep voltage within acceptable limits?
• Choking a wire rope sling reduces the Working Load Limit (WLL) by what percent?
• What does the display on the amp stick (tuning fork) indicate?
• How is the start of an operation indicated on a switching log?
• SCCR influences the rating of which component in electrical systems?
• Which device automatically adjusts circuit voltage up and down based on the load that flows through the regulator?
• A transformer with a given turns ratio steps voltage from primary to secondary. If you increase the turns ratio while keeping primary voltage constant, what happens to the secondary voltage?
• A switched capacitor bank may be remotely activated by which system?
• What are the minimum rubber glove requirements when working with equipment or structures energized at 480 volts?
• What should you do if a ground cable is damaged or has broken strands?
• Which type of grounds is required when there is a conductor on the ground?
• In new construction conduit sizing, what is the rationale for sizing to the next larger cable size?
• During a stringing operation, what is the current tension given for the span?
• In a 480 V line-to-line three-phase system with a wye connection, what is the phase voltage V_PH?
• Which statement best describes who may serve as a grounding observer?
• What is the purpose of Short-Circuit Current Rating (SCCR) in electrical equipment?
• Fuses may be installed for what purpose?
• When working as part of a three-person rubber glove crew on 21kV lines, who can determine, with crew consensus, whether a non-test is required?
• Facilities adjacent and/or parallel to energized circuits create which type of electrical hazard?
• Which practice best describes proper tool inspection prior to use?
• For new construction, the conduit is usually sized to accommodate
• Which instrument is best to identify the customer's neutral?
• Which of the following are sources of backfeed?
• What is the purpose of waxing a hot stick?
• Which facility handles glove testing and disposal for suspect, contaminated, or expired gloves?
• If you increase tension on a long span, what happens to sag?
• What is the minimum anchorage for a tower?
• Line reclosers are used to
• Which combination of gloves and protection provides the minimum standard for 480-volt energized work?
• What is the safe minimum approach distance (MAD) for 12 kV?
• Before operating a high-energy load-break connector when overload is suspected, what action should you take?
• In conductor tension and sag analysis, what factors determine the required tension for a span?
• When foreign grounds are found in an EPZ, what is a proper action to maintain grounding integrity?
• Dead-end anchor and safety significance in distribution lines.
• What must be done when considering fault current for selecting grounding devices?
• What is a ground fault and how do GFCIs protect people in residential circuits?
• What is the purpose of a per-unit system in power system analysis?
• In a Wye-connected transformer, what is the role of the neutral, and how is it used for single-phase loads?
• Which item is specifically approved to accompany hot sticks during wet weather operations?
• You have visually inspected a hot stick and it is fit for continued service, but it is missing an end cap. What should you do?
• When a fiber hoist is connected to or supporting a 17kV adjacent phase, it must be considered
• During grounding a dead-break transformer, if voltage is detected, what is the correct action?