LMS Substation 3-2 Practice Test

These questions are part of the practice quiz. Start practicing

• For what purpose is a ground cable primarily used at a worksite?
• Is it true that clipping crews are protected by individual grounds while working?
• A contract is the final outcome of what process?
• What is a key element in ensuring effective labor-management relations?
• Which component is essential for protection in personal grounding schemes within electrical work?
• What is the primary function of a surge arrestor?
• For an agreement to be considered good, it must be agreeable to both parties and also be what?
• How much current can a lightning strike potentially carry?
• What is considered the best path for fault current to return to the source?
• Which method is NOT used to protect workers when high earth voltage is anticipated in a work area?
• If there is any voltage on a line, what does this indicate?
• What happens to a lightning arrestor after a lightning event?
• What should be used when isolating underground cables?
• Why are insulation and equipotential zone protection methods sometimes difficult to implement?
• When using the direct method to test earth resistance, what is essential regarding the ground rod under test?
• The amount of body current is dependent on both the voltage and what else?
• Can an entire substation grid and associated ground rods be tested with a clamp-on resistance tester?
• What is the relationship between the distance from a grounding point and induced voltage?
• How many rods are required for the fall-of-potential method to test earth resistance?
• What happens if one power line has a voltage around it in relation to an adjacent line?
• Why is it essential to ensure equipment is properly grounded in underground work?
• What issue may arise when using truck-mounted booms with non-insulated baskets during maintenance?
• According to the ASTM Standard F855, what is the rating capacity for #2 AWG for a duration of 15 cycles?
• What occurs when terminal ground switches at each end of an energized and deenergized transmission line are closed?
• During maintenance, what is necessary to account for when working with energized lines?
• What is the effect of connecting multiple resistors in parallel on the total current supplied by the voltage source?
• What is a primary benefit of using equipotential zones?
• Where should personal protective grounds at a substation be attached?
• Ground cable clamps with serrated jaws serve what purpose?
• What is the correct term for the device that reduces voltage spikes caused by lightning?
• Why is it important to use hot sticks when working with electrical systems at different potentials?
• What device is primarily used for protecting electrical systems from voltage surges?
• What is the order of connection for the ground-end clamp of a jumper?
• What is the function of lightning arrestors in electrical systems?
• How does the resistance around a ground rod change when moisture in the earth freezes?
• When contact is made with a line energized at what voltage or more can the outer skin be punctured?
• What is one of the three factors that cause earth resistance to vary?
• How does a good grounding system affect the voltage to earth of an electrical system?
• Which types of steel static wire can protect a transmission line?
• In cases of contract disagreement, who serves as the arbiter to make binding decisions?
• How much hotter can the heat produced by a lightning strike be compared to the surface of the sun?
• When installing and removing a ground cable, what is the correct sequence to follow?
• What body current over a short duration can have the same result as a longer shock with a lower current?
• What does coiling ground cables do during a fault current event?
• Using Ohm's Law, how can current be calculated?
• Given a parallel circuit with an equivalent resistance of 6 ohms, what is the total circuit current with a 48-volt source?
• Which law is used to describe the relationship between voltage, current, and resistance?
• What does the term 'arbitration' imply in the context of labor agreements?
• What is a consequence of not properly grounding equipment in electrical work?
• What issue arises by using the phase-to-common-ground method?
• What is the main purpose of the ground rod in an electrical system?
• A current of 0.016 amperes is equivalent to how many milliamperes?
• What may be required during stringing operations paralleling energized lines?
• What is the primary purpose of a portable conductive mat in underground work environments?
• What is the common safety hazard related to multiple grounds when using non-insulated platforms?
• An equipotential zone is suitable for use with which types of vehicles?
• Was the phase-to-common-ground method an improvement over the phase-to-separate-ground method?
• When is a cable considered isolated and safe to work on?
• How does increased earth resistivity affect grounding systems during summer?
• Is the woven conductor in portable conductive mats heavy enough to be part of the trip current path?
• A line with no connected load will exhibit what type of field around it?
• What is the primary goal when establishing grounding at a worksite?
• What is required for attaching ground end clamps if the grounded system and the worker are at different potentials?
• If a steel tower is grounded poorly, what potential risk exists when working near it?
• What is the most common cause of accidents aside from direct contact with energized lines?
• What might cause nuisance shocks to workers touching vehicles?
• What method can be used effectively when testing a large ground system like a substation?
• Why is grounding considered a vital safety measure in electrical work?
• Which condition primarily affects ground resistance in a ground rod installation?
• What type of unseen hazards may exist in underground work situations?
• What primarily limits the circulating current flow in a deenergized circuit with bracket grounds installed?
• Is it true that a lightning arrestor used to protect a line will drain off 100% of a lightning strike?
• What is necessary for the proper selection and application of grounding jumpers and equipment?
• During negotiations, each side is obligated to negotiate in what manner?
• When using a personal equipotential ground, what happens if there is a pole ground present?
• An equipotential zone minimizes the voltage difference between the worker's contact point and which part of their body?
• How can the type of boots and gloves worn affect worker safety?
• What is the purpose of outside grounds used with an equipotential ground?
• How does an equipotential zone protect a worker?
• In a combination circuit, how does current divide at the parallel branches?
• What is the voltage on insulated overhead shield wires generally held to?
• What type of lightning arrestor would typically be installed in a 230-kilovolt switching yard?
• What should a worker do if the grounding assembly is loosened during operation?
• When resistors are connected in a parallel circuit, how does the total current behave?
• What is the maximum distance increments for placing 3-phase grounds on conductors, subconductors, or pulling lines?
• Which of the following enhances ground resistance effectively?
• In which scenario does the clamp-on resistance test for ground rods work best?
• What is the primary purpose of lightning protection systems?
• Are fault currents in substations typically larger or smaller than at remote worksites?
• A binding arbitration decision is made by whom?
• What does the formula ET = E1 + E2 + ... EN calculate?
• Before making a mid-span repair to a damaged cable, what should be done with the cable ends?
• Are static wires used on electrical transmission lines considered part of the electrical circuit?
• Which of the following describes how equipotential zones contribute to safety?
• What is the equivalent resistance of a circuit with parallel resistances of 5 ohms and 15 ohms?
• Which of the following provides a safe exit path for electrical surges?
• Is the Bureau of Labor Statistics an arbitrator for the electrical contracting industry?
• Which variable must be determined by the employer or utility prior to selecting grounding equipment?
• What is used to keep voltage consistent across lines, vehicles, and components?
• Is incorrect phase identification at terminals common and how often does it result in accidents?
• What influences the amount of body current experienced by a person?
• During which season is earth resistivity generally higher in most parts of the country?
• Grounding clamps intended for flat surfaces are referred to as?
• What can be used to find a specific approximation of the voltage on the line?
• Does an energized line that is not feeding load still have a significant risk associated with it?
• What does the formula mentioned in the content calculate?
• How can a basic understanding of circuits assist workers in underground environments?
• An equipotential zone is created by which of the following methods?
• During substation maintenance, is back-feed ever a hazard?
• What is the role of the neutral in electrical systems regarding fault current?
• Is it true or false that workers in a basket will be subject to lethal current if an energized line makes contact with the boom of a bucket truck below the insulated sections?
• True or False: Historical grounding methods included the current path through the worker.
• Which type of grounding clamp is specifically designed for hot stick operation?
• What is the purpose of unwinding the grounding cable on truck-mounted cable reels?
• Grounding cable must have an ampacity that is greater than or equal to which gauge?
• What describes a form of induced voltage where air is the dielectric?
• When using a cluster bar and personal jumper to create an equipotential zone, what should the worker mainly focus on?
• Where equipotential grounding is not feasible, how can protection be provided for underground distribution work?
• What safety tool can indicate voltage without direct contact?
• What does a personal jumper consist of in electrical work?
• What typically causes an arc between a conductor and a worker in an insulated basket?
• What is the purpose of a grievance?
• What was the outcome of the vault test when a bonded conductive mat was used and the neutral switch was open?
• Do pole guys present touch or step potential hazards?
• How long should current flow in a longer shock, according to research?
• What is the key benefit of using multiple ground rods?
• What methods are commonly used for protection during underground maintenance?
• True or False: The pellet arrestor is still commonly used on new 2,400-volt systems.
• What should workers wear to ensure maximum protection from touch potential hazards?
• What type of protection can a portable conductive mat provide when working around pad-mount switches and transformers?
• A metal-oxide arrestor conducts less than what percentage of follow-current after a lightning strike?
• What type of grounding condition can affect electrical safety the most?
• Will placing grounds at each side of the worksite protect the worker from current?
• Why is a personal equipotential ground important in electrical work?
• What remains the primary situation where bracket grounding is still a viable option?
• What is true regarding a worker stepping across energized earth distances?
• What is a common method of protection used in substations?
• What is the typical body resistance of a qualified worker in ohms?
• Which component is considered the weakest point in a grounding jumper assembly?
• When management and labor cannot reach an agreement, what is brought in to help facilitate the agreement?
• Which grounding technique can significantly reduce the risk of electric shock?
• How does an electrode (ground rod) radiate current when driven into earth of uniform resistivity?
• What characteristic distinguishes a parallel circuit from a series circuit regarding current flow?
• Do substations have the same hazards as other areas of the electrical industry?
• Grounding clamps designed for installation with hot sticks are classified as?
• How does the equivalent resistance of a parallel circuit compare to the branch with the lowest resistance value?
• What is an alternate method if it is impractical to install a complete grounding set at the worksite?
• Does properly grounding a piece of equipment eliminate static electricity from friction?
• What is a requirement for using equipotential zones?
• What type of circuit are electrical distribution systems classified as?
• What happens to profits when a strike occurs?
• What happens to the current flow when there is a fault in the power system during a ground resistance test?
• What material is commonly used for housing a lightning arrestor?
• Is the human body designed to handle even minimal electrical currents?
• What is a primary consideration when installing static wires on transmission lines?
• Which type of modern distribution lightning arrestor has no gaps between valves?
• What is the process called when two parties turn a disagreement over to a third party for resolution?
• Is it acceptable to assemble grounding jumpers with cables manufactured for welding?
• Why do loops that carry induced current form in substations?
• What does the presence of a neutral indicate during underground testing?
• Which type of earth has the lowest resistivity?
• In a series circuit, which component develops the greatest voltage drop?
• The lightning horn used in rural areas is made of what size copper wire?
• Is it necessary to create an equipotential zone when working from a bucket truck with an insulated boom?
• What is the second type of test, besides the clamp-on test, for measuring ground rod resistance?
• How can workers establish safety in areas with high earth voltages?
• Induced voltage is more hazardous to qualified electrical workers compared to which of the following?
• What is the industry standard distance for installing a ground rod from the pole in undisturbed earth?
• What may develop if instrument transformers are not grounded during testing?
• When a worker in an insulated basket makes contact with a line, where will the greatest voltage drop occur when there is a potential difference?
• Where can you find federal law regarding the testing of lines for the absence of nominal voltage?
• Which of the following statements about training for workers is correct?
• When grounding a 4-wire distribution circuit, what is the most effective ground electrode?
• To restore the heart's rhythmic beat, what should be used?
• In grounding assembly, what must be ensured to limit the number of linked jumpers?
• True or False: Similar methods of protection are available for both step potential and touch potential.
• In a conductor, what happens to resistance as the length increases?
• What term is used for bracket grounds in a grounding scheme?
• If the voltage at the earth's connection point is 20 kilovolts, what is the surface voltage measured at a distance of nine feet away?
• Which component of a transmission line may require improvement due to a history of damaging lightning strikes?
• What does maintaining a low voltage across a worker signify in an equipotential zone?
• According to the National Electrical Code® (NEC), what is the recommended maximum ground resistance for a ground rod?
• What factor increases the risk of step potential during electrical incidents?
• To prevent strand breakage where a cable enters a ferrule, what is recommended?
• Do stringing blocks with electrically conductive neoprene linings meet grounding requirements?
• What is a key recommendation regarding personal protective ground during maintenance work in a substation?
• According to OSHA 1910.269, what must grounding equipment be capable of conducting?
• Which device is essential when testing ground resistance for ensuring safety?
• What is a risk associated with inadequate grounding methods historically used?
• How is the presence of voltage indicated without making contact with the line?
• Why does substation grounding require extra training?
• What is the effect of connecting grounding jumpers from each phase wire to the neutral?
• Which component is associated with lowering follow-current in a lightning protection system?
• How long does the cleaning effect produced by wire brushing line conductors last?
• The current that results from a lightning strike is classified as what type?
• What is the typical service life of chemical ground rods?
• What kind of currents may be hazardous to workers due to improper grounding techniques?
• What must be obtained before work begins on a deenergized line?
• The proper use of a conductive mat provides what type of protection for ground workers?
• Is it accurate to say that coiling ground cables is effective in minimizing whipping during a fault current event?
• If a four-foot ground rod has a resistance of 40 ohms, what will be its resistance if extended to eight feet?
• What type of electrical issue arises when close-coupled lines create induced voltage?
• What happens if an equipotential zone is improperly utilized?
• What does the term "equipotential" refer to?
• When is the best time to conduct a ground resistance test on a ground rod?
• What is the assumed body resistance that allows for calculations for worker protection methods?
• If an energized conductor contacts an uninsulated truck boom, where does all the fault current flow?
• What characterizes the slope method in testing ground systems?
• When does current flow from a line charged with induced voltage?
• If a ground jumper has a resistance of 0.001 ohms and the worker's body resistance is 1,000 ohms, how many times greater is the body resistance?
• What type of relations is the electrical construction industry considered a model of due to its "strikeless" reputation?
• What outcome is associated with improper handling of underground cables based on the testing done in vaults?
• What is the purpose of spiking an insulated cable?
• What is the method called when a complete grounding set with a cluster bracket and personal jumper is installed at the worksite?
• When working between grounds in a substation, what should you check for?
• Is the use of separate grounds for elbow-type bucket trucks with insulated sections acceptable?
• What is the primary requirement for grounding in the outdated approach discussed?
• Which of the following is NOT one of the common types of ground treatments used to enhance ground resistance?
• What does EPZ stand for in underground cable maintenance?
• Which grounding method is considered the most dangerous that is still in use?
• What should be done to ensure safety when working near multiple grounded lines?
• Protector tubes perform their function typically between which two components?
• What type of ferrules can be used with either aluminum or bronze clamps?
• How are asymmetrical currents defined?
• What should be avoided during a grievance process?
• In an electrical circuit, what does a higher resistance indicate?
• Why is equipotential grounding considered a proven method?
• The required ampacity for grounding equipment should be greater than or equal to what size copper?
• Which of the following statements is true about strikes?
• Qualified Electrical Workers can protect themselves from ground gradients by establishing an equipotential zone or by wearing what?
• Is it important for a labor agreement to have a precise time period for renewal?
• For a contract to be effective, who should it serve?
• In the vault test scenario, what was the potential voltage drop experienced by the worker when in contact with an ungrounded case?
• What will occur upon the installation of protective grounds at the worksite?
• When working across energized lines, what should be done to the circuit breakers on the hot line?
• How can workers near grounded vehicles be protected from step and touch potential?
• In a series circuit with resistors R1 = 8 Ω, R2 = 11 Ω, and R3 = 13 Ω, which statement is true?
• A labor agreement is subject to renewal or change at what time?
• When an agreement is reached by a third party, what is its nature?
• What surrounds the conductive mat in the preferred method of using metallic ground mats?
• Which of the following actions is essential when removing a ground-end clamp?
• To calculate equivalent resistance in a parallel circuit, which equation is applied?
• What is often referred to as a labor agreement?
• When work is being performed from structures, how are clipping crews protected?
• Do portable conductive mats provide equipotential zone protection to the edge of the mat only?
• What is the primary purpose of using a ground rod in electrical work?
• Which of the following statements is true regarding electrical safety in proximity to lines?
• How is the total voltage in a parallel circuit compared across all branches?
• Is it safer to ground using an equipotential zone compared to performing live-line work on a circuit?
• What is the construction design of an underground cable characterized as?
• In what situation can an equipotential zone be effective for a Qualified Electrical Worker?
• Do harmonious working conditions contribute to safety in the workplace?
• Does voltage flow through the human body cause burning of body tissues?
• What is true regarding the requirement of a connection to earth when using equipotential grounding?
• What is the key role of a neutral person in labor disputes?
• A circuit with four 20-ohm resistors operating at 1.5 amperes is powered by what voltage source?
• After the job briefing, what should a worker remain focused on?
• What ensures fast trip-out operation of circuit protection devices in a grounding set?
• What is often the weak link in a running ground?
• During a mid-span splice, when is a worker not protected by a bonded conductive mat?
• No voltage drop occurs across a resistor until there is current flow through it. Is this statement true or false?
• What factor makes maintaining a safe work area difficult during construction activities?
• What type of circuit has equal voltage drop across all components?
• What aspect is crucial during the implementation of grounding methods?
• If the distance between the worker and the ground is 300 feet or more, what must the worker do?
• How much current lasting three seconds can result in possible ventricular fibrillation in both men and women?
• What protective gear should an operator wear when conducting ground resistance tests?
• What is the primary function of a lightning horn in electricity transmission?
• Is it true that the resistance around a ground rod increases dramatically when moisture freezes in the earth?
• Which approach is typically considered the safest for working near electrical lines?
• A body current of what value can lead to certain death from a brief shock?
• Under what circumstances does insulation protect a worker in their work location?
• How should a worker ensure safety when working near conductors with a cluster bar and personal jumper?
• What is the perception level of body current that should protect a male worker?
• Why should all vehicles and trailers be connected to a common ground rod?
• The jacket on grounding cable typically has an insulation rating of what voltage?
• What must both sides do to reach a good agreement?
• In terms of safety, lightning arrestors are primarily designed to protect which of the following?
• What happens to induced voltage or current as the distance between deenergized and energized lines increases?
• What happens if jumper placement is incorrect?
• What is the effect of using multiple grounding points in a substation?
• When using multiple ground rods, they should be spaced apart at least farther than what measurement?
• What does OSHA require regarding temporary protective grounds?
• What is the role of ground connections in reducing electrical hazards near deenergized lines?
• True or False: The presence of a ground wire on a pole does not pose a potential path to ground through the worker.
• How do mechanical forces during asymmetrical current flow behave?
• What does bargaining in good faith entail?
• In the context of workplace safety, what does "bypass" specifically refer to when discussing current?
• Which grounding method is preferred when work is to be performed on deenergized lines?
• What hazard is created by using the bracket grounding method?
• What current threshold causes muscles to contract such that a hand grip on an energized object cannot be released?
• Which type of equipment is used for isolation protection?
• What causes asymmetrical current in a substation?
• How much distance should no one approach a grounded vehicle while it is in contact with a conductor?
• In the context of lightning arrestors, what does the abbreviation MOV stand for?
• Driving a ground rod deeper will result in what effect on the earth's resistance?
• What is the form of induced voltage caused by wind or atmospheric conditions?
• Why will lightning strike a static wire instead of a transmission phase?
• What is the effect on the value of voltage at the earth's surface as the distance from the connection point increases?
• At what body current level might a male experience painful and severe shock?
• What is a requirement for a Qualified Electrical Worker in a substation?
• Is it better to attach grounding clamps to the armor rod than to the conductors when armor rod is present on line conductors?
• What is the distance of the second outer nonconductive barrier placed around the conductive mat?
• What is true about the ability to establish an equipotential zone in a substation?
• With electromagnetic-coupled lines, how is the magnetic field of the energized line characterized?
• What is required due to high fault current levels in substations?
• What is the voltage drop across all resistors in a parallel circuit?
• Why has grounding been a controversial subject for years?
• What is the consequence of not using an equipotential zone when required?
• When a worker contacts a line conductor while on an uninsulated truck-mounted platform, what occurs?
• Who is the most difficult person to protect at a job site?
• What is the aim of grounding in electrical systems?
• Rubber overshoes used for protection against touch and step potential are manufactured according to which standards?
• What type of ground is placed on the conductor or wire rope during stringing operations?
• What effect do asymmetrical currents have on aluminum welded grounding connections?
• What effect does the housing of a lightning arrestor have in case of a failure?
• What is the main reason for establishing an equipotential zone at a worksite?
• A groundman can encounter a touch potential hazard by doing what?
• In which part of a combination circuit does current divide?
• Where is a dead-front elbow arrestor typically used?
• A clean and tight jumper may have a resistance as low as what value?
• In a series circuit with a 240-volt source and three resistors of 8 ohms, 10 ohms, and 12 ohms, what is the current flow?
• Which method serves as a level of protection against electrical hazards besides using a conductive mat?
• What should be used when a step potential exists between a steel tower and high resistance earth?
• Which of the following describes a hazard that cannot be visually identified when working underground?
• What is the consequence of not having a lightning arrestor on transmission lines?
• What happens to the overall resistance in a parallel circuit as more branches are added?
• Is it true that the clamp-on resistance test for ground rods works best on connected ground rods?
• What is a critical condition to check before handling power lines?
• Aerial work platforms with uninsulated booms must be:
• What is a potential consequence of using incorrectly sized grounding cables?
• What is the best approach for reducing ground resistance when needed?
• When a worker is on a conductive ground mat that becomes energized, what will occur when they step off?
• What method is used to find the equivalent resistance of two resistors in parallel?
• Why are static wires not included in the electrical circuit of transmission lines?
• What is the maximum discharge voltage of a modern lightning arrestor recommended to be in relation to the BIL of the protected equipment?
• What common issue might arise when cutting underground residential distribution (URD) cables?
• The use of equipotential grounding provides what benefit?
• True or False: Bus clamps have serrated jaws that penetrate oxidation on tubular substation bus work.
• What happens to current in a series circuit if more resistors are added?
• What happens as a result of current flow through a resistance?
• When paralleling ground rods to reduce earth resistance at a construction site, how far apart must they be placed?
• What is the role of barricades at pulling and tensioning sites?
• Which grounding method involves connecting grounding conductors to multiple points in the earth?
• What does 'body current' refer to in electrical terms?
• What happens to body current levels when the skin is punctured?
• When a single phase of a 3-phase line is grounded, how is the minimum approach distance to the ungrounded deenergized phases affected?
• What is the weak link in a grounding jumper assembly?
• Grounding clamps are typically made from which materials?
• In a circuit with resistances of 10 ohms and 15 ohms energized at 60 volts, what is the current through the 15-ohm branch?
• What type of worker protection does distancing oneself from all vehicles and grounded items provide?
• What does the installation of a complete grounding set bonding the phases, the neutral, and earth together ensure?
• What is the primary difference in perception and let-go current thresholds between genders?
• According to OSHA, the grounding ampacity must be greater than or equal to that of what size of copper?
• Who conducted tests to evaluate the body's reaction to low currents on volunteers?
• What is one potential hazard associated with lightning strikes?
• When conducting tests in an underground vault, what is inferred if the neutral is present?
• True or False: Incorrect placement of jumpers can increase the resistance of the path in parallel with a worker.
• True or False: Grounding cables with clear thermoplastic insulation become stiff at low temperatures.
• Which method impedes work progress, contributing to grounding controversy?
• What is true regarding the induced voltage in an electromagnetic field?
• What does the "great myth" concerning grounding state?
• When can a worker aloft establish a grounding scheme without a connection to earth?
• What is the recommended procedure for removing grounding assemblies?
• What role does a protector tube play in lightning protection?
• True or False: The human body can withstand a higher current for a shorter time and avoid heart fibrillation.
• What is a possible consequence of electrical circuits being in close proximity?
• Which is an indicator of a properly functioning lightning protection system?
• Which of the following best describes the importance of a running ground during operations?
• According to the National Electrical Code® (NEC), what is required if a single electrode has a resistance to ground greater than 25 ohms?
• At distribution voltages, how much does the voltage drop across the earth decrease for each two to three feet?
• What is the specified minimum approach distance when working near insulated overhead ground wires for a 15-kilovolt circuit?
• Do the five historical grounding methods place the worker in a parallel fault current path?
• What is the purpose of a clearance in line work?
• By what percentage must cable ratings be reduced when paralleling grounding cables for greater fault current capacity if unrestrained?
• What principle do the laws of current flow in a parallel circuit support?
• What is a characteristic of asymmetrical current compared to symmetrical current?
• Who is responsible for providing training and defining work methods for all workers?
• A body current of 50 mA results from what voltage drop across a worker with typical body resistance?
• Asymmetrical current flow in substations is significantly offset from which axis?
• To allow a safe margin, what resistance value per jumper assembly is recommended in reference materials?
• What is one advantage of the phase-to-phase-to-ground method?
• Which of the following is NOT a function of grounding clamps?
• Where is a protector tube normally placed on a transmission line?
• What is the voltage at the earth's connection point compared to that of the overhead conductor it is attached to?
• True or False: Equipment and vehicles connected to a common ground will protect workers only if they are standing on a conductive mat.
• What is the impact of a high resistance in grounding systems in an electrical setup?
• How much does the voltage drop across the earth decrease at distribution voltages for each two to three feet?
• According to OSHA, which grounding method is required?
• How does the induced voltage behave at a single-point grounding location?
• During a boom contact fault current event, what does a driven ground rod and grounding cable connected to a truck help protect?
• A labor agreement results from what process?
• In labor relations, what does a contract generally represent?
• Under what condition can a deenergized line cause a hazard to workers nearby?
• What danger does a worker face when standing near a truck that accidentally makes electrical contact?
• What is the most serious current path through the body associated with?
• Can a harmonious work environment be created solely through government regulation?
• Grounds need to be sized to handle what type of current?
• What surrounds a line that is energized but not feeding a load or source?
• What is the maximum number of linked grounding jumpers connected in parallel with a worker for safety?
• As an energized line gets closer to a deenergized line, what occurs regarding charge buildup?
• Is it acceptable to hold a ground cable near the base of a hot stick to lighten the load on the head of the stick?
• By how much does doubling the length of ground rods reduce resistance?
• What benefit was observed when using a bonded conductive mat to create an equipotential zone during the tests?
• What does a low-resistance bypass jumper create between the line conductor and the uninsulated basket?
• What must be considered when determining worker protection methods?
• Considering only one side of the industry during negotiations leads to what?
• Which grounding method allows for the most rapid fault clearing by the system's overcurrent protection equipment?
• Why must voltage dividers be disconnected and grounded during testing?
• If a worker does not utilize insulation rated for the present voltage, what risk does this pose?
• If a low-resistance grounding jumper is used with a worker, what will happen to body current during accidental energization?
• What is the current threshold level called that causes a slight tingling in the hand of an average male worker?
• Barricading areas around vehicles and equipment at pulling and tensioning sites is a form of what type of protection?
• What is the primary reason for using alumaweld in transmission line protection?
• True or False: The static wire on a transmission line supported by wooden poles must be grounded at every structure.
• On crossarm-type construction, what configuration provides the lowest resistance path for shunting current?
• What is the result of excessively long grounding cables being installed?
• What can be used as a fault current return path if work is to be performed on H-structure type transmission lines?
• What is the main purpose of grounding in electrical systems?
• What happens to the resistance of a ground rod when its diameter is doubled?
• What is the purpose of a cluster bar in a personal jumper?
• What is a necessary condition for effective grounding in electrical work?