Lightning Protection Institute (LPI) Journeyman Practice Test

These questions are part of the practice quiz. Start practicing

• How far apart can air terminals projecting 24 inches above the roof edge be spaced at maximum?
• What function does a "megger" serve?
• What is a potential consequence of inadequate bonding?
• What does the term 'zone of protection' refer to in lightning protection?
• When copper conductor is used, what may other lightning protection components be?
• Is the most recent edition of the LPI standard from 1985?
• What material is prohibited from contacting alkaline base paint coated surfaces?
• What is acceptable for use as a down conductor guard?
• Does a non-conductive body extending above the zone of protection require an air terminal?
• What is the main purpose of a lightning protection system?
• Fasteners used in lightning protection should be ...
• What is the primary purpose of a G.F.I.?
• Aluminum cable may be concealed in which of the following?
• For installing a service arrester at an exterior entrance, which type of ladder is preferable?
• Which tool is most appropriate for checking air terminals?
• What does lightning voltage represent?
• Which material can be substituted for the main conductor?
• What is one reason to avoid using tie wire for ground rod connections?
• Which of the following is not an approved alternate to normal ground rods?
• Which class of materials is used for lightning protection of buildings not exceeding 75 feet?
• What standard does the Lightning Protection Institute use for installations?
• What is the purpose of measuring ground resistance?
• Which of these hammers is typically used in lightning protection work?
• What must be considered to minimize lightning hazards to buildings?
• When structural steel columns are utilized as downleads, how often must they be grounded?
• What is the maximum allowed spacing for fastening exposed cable?
• Can metal siding and roofing be used in place of a main conductor?
• In what condition should water and electrical systems be interconnected in lightning protection?
• Chimney air terminals should be spaced so no outside corner of the chimney is more than _______ inches from an air terminal
• Which method can be used to enhance the performance of ground rods?
• An aluminum down conductor should be joined using what type of connector?
• What is the required grounding distance between structural steel columns when used as downleads?
• What fastening device is required when one conductor on a flat roof crosses another?
• What is the purpose of using LPI standards?
• Which of the following is NOT an approved method for coupling ground rods together for deeper grounding?
• All copper parts used on the top 25 feet of a heavy duty smokestack should be ...
• Which of the following material forms may be used for air terminals?
• Why is it important to have a low-resistance ground in lightning protection?
• Is it acceptable for two downleads to be spaced closer together than 100 feet?
• What should be the minimum height for grounded structures according to some standards?
• What is an acceptable grounding rod material?
• Where should connections to ground electrodes be made?
• Is a 1/2 inch diameter by 10-foot long ground rod acceptable for any lightning protection installation?
• What is the purpose of using main size cable conductor in lightning protection systems?
• Is only one air terminal required to be mounted to a chimney if it's located within 24 inches of all outside corners?
• What does G.F.I. stand for in electrical safety?
• At what distance should grounding connections be from a foundation wall?
• Which of the following is essential to ensure proper grounding in lightning protection systems?
• Which material is recommended for corrosion prevention on the top of a chimney?
• How far above a residential chimney must copper equipment be lead coated?
• What is required for the connecting cable from a down conductor to a water pipe?
• What is the main purpose of a ground electrode system?
• What is the minimum acceptable diameter for copper clad ground rods used on Class II structures according to UL 96A?
• Which of the following should not come into contact with alkaline base paint?
• Which of the following is not eligible for UL master label or LPI system certification?
• Which component provides electrical continuity in a lightning protection system?
• What is the purpose of connections to metal objects within the zone of protection?
• What defines lightning amperage?
• Do dormers always fall under the zone of protection provided by ridge air terminals?
• What is the key benefit of using exothermic bonding in lightning protection?
• Which material is commonly used for lightning rods?
• When is it necessary to protect chimneys on residences?
• How often must full conductor downleads be spaced on a building?
• According to standard LPI-175, what material should be used for tree protection?
• What do the letters AWG stand for in the lightning protection industry?
• What is a requirement for ground clamps in a lightning protection system?
• How far must an air terminal extend above the protected object at minimum?
• What is the main purpose of a surge arrestor?
• What is the minimum diameter for a solid aluminum air terminal for Class I air terminal?
• Should an air terminal be mounted within 2 inches of any outside building corner?
• Which class of materials is used for buildings exceeding 75 feet in height?
• What is the semantic purpose of down conductors in a lightning protection system?
• A stroke of lightning is most similar to which of the following?
• What does the primary conductor in a counterpoise system connect?
• What is a common practice for maintaining safety in a lightning protection system?
• Which factor is considered to have the greatest impact on soil resistivity?
• The device on which a ridge air terminal point is mounted is commonly called ...
• When grounding in shallow sandy or gravelly soil, how deep should trenches be where conductors are laid?
• What is the minimum number of column bond/grounds required for a rectangular steel frame building using steel as downleads?
• The range an air terminal may extend above a residential type chimney without additional support is from ...
• What is the required type of contact for a ground clamp with cable conductor and ground rod?
• Why does lightning occur in nature?
• Which tool is NOT typically associated with lightning protection work?
• What type of devices should be used to attach aluminum air terminals?
• Which type of connector would be used for securing conductors to the structure?
• What is a key principle in lightning protection systems?
• Which materials are allowable as ground rods according to lightning protection standards?
• Which of the following components of a lightning protection system is defined as a ground terminal?
• What scale is recommended for accurately scaling a roof plan lightning protection layout?
• Which type of drill bits might be utilized in lightning protection installation?
• At which height does the need for more sophisticated protection systems typically become necessary?
• What is the minimum contact area for a bonding plate for ground connections on a steel frame building?
• A lightning ground terminal may be represented by which of the following?
• What is the maximum spacing for air terminals along the roof perimeter or ridge?
• A connection between the lightning protection system and the water pipe system may also interconnect with which of the following?
• For Class II lightning protection, what types of connections are approved?
• What determines the size of a counterpoise conductor?
• What type of fasteners should be avoided in lightning protection installations?
• What does a counterpoise connect in a lightning protection system?
• Which type of grounding is recommended to prevent lighting damage?
• Which component is responsible for diverting the electrical charge of lightning safely into the ground?
• How should fittings in Class II lightning protection systems be secured?
• What role do conductors play in a lightning protection system?
• How can lightning danger be prevented?
• What aspect of a building does not affect the lightning vulnerability?
• Which of the following cables is larger?
• Who is credited with the invention of lightning rods?
• Is it permissible to course a conductor through the air for 5' by doubling the fasteners on each end?
• Which of the following is NOT considered a basic component of a lightning protection system?
• What is the minimum number of downleads required for any structure, regardless of size?
• What is the maximum interval for connecting a mid-roof run to the perimeter circuit?
• How does the performance of chemicals improve ground rod efficiency?
• What factor influences a lone object’s vulnerability to lightning in a flat plain setting?
• For buildings over what height are 1/2 inch diameter copper or 5/8 inch diameter aluminum points required?
• What is the primary function of secondary conductors in lightning protection systems?
• For air terminals positioned over 24 inches in height, what must be done?
• Main roof conductors should ideally be coursed along which of the following?
• In the context of conventional buildings, what defines the zone of protection?
• The radius of a bend in a lightning conductor must not be less than how many inches according to LPI-175?
• On structures using steel as downleads, what is the maximum average distance between grounds?
• Which of the following is also not eligible for UL master label or LPI system certification?
• Can copper cable be installed directly in poured concrete?
• Can main size aluminum conductor be used in tree lightning protection?
• Why is bonding important in lightning protection systems?
• What is the advisable practice regarding the mounting of bare copper and aluminum materials?
• What is the primary reason for using bonded siding in a construction context?
• What is the proper method of grounding a tree?
• What should grounding and bonding installations comply with?
• How frequently should cable run in metallic tubing be bonded to the tube?
• Which of the following measuring devices might you use?
• Can lead dipped copper chimney points be integrated into chimney construction?
• On a flat roof with built up roofing, which base cannot be used?
• An "exothermic" connection is made by ...
• What is the minimum diameter for a solid copper air terminal for Class I?
• How far apart should fasteners be spaced on all exposed conductors?
• Which material is NOT acceptable for air terminals?
• A copper down conductor may never be ...
• What should be the characteristic of ground rods used in lightning protection?
• Which size of nail is the largest?
• Under standard LPI-175, which ground rod material is NOT acceptable?
• What method is recommended for ensuring that bonding fittings in lightning protection systems are secured?
• An aluminum down conductor should be ...
• When aluminum is used as a downlead cable, how far must it be terminated above grade?
• What is the maximum average distance between grounds on structures with full cable downleads?
• What is the minimum contact area required for connectors of cable conductor to structural steel?
• What is the purpose of bonding in a lightning protection system?
• On flat or gently sloped roofs, how far apart must mid roof air terminals be spaced at maximum?
• What type of support is used to attach conductors to the trunk in tree protection?
• What is the minimum length that conductors should be when laid in trenches within shallow sandy or gravelly soil?
• What is EPDM commonly used for?
• What is the preferred placement for all downleads on a structure?
• On a flat roof with built-up roofing, which base can be used?
• What type of resistance is critical for evaluating the effectiveness of a lightning protection system?
• Which of the following options is NOT a type of conductor run that must always be followed?
• What is the function of ground terminals in a lightning protection system?
• According to UL 96A and LPI-175, what is the minimum ground system earth resistance value required?
• What must be done when air terminals exceed 24 inches in height according to safety regulations?
• Which materials are not acceptable for use in lightning protection systems?
• How high must a side-mount air terminal project above the object being protected?
• According to LPI-175, what should be done if the electric service is underground?
• When may copper lightning protection materials be installed on bare aluminum roofing or siding?
• Is it permissible for a conductor to be bent more than 90 degrees?
• Which of the following tools are commonly used in lightning protection systems?
• Why is soil moisture such a critical factor in ground resistivity?
• Which brand is NOT a type of single ply membrane roof?
• When can aluminum cable be used in lightning protection systems?
• What is the maximum spacing recommended for ground rods?
• Should main conductors maintain a horizontal or downward course free of "U" or "V" pockets?
• What is the minimum diameter for ground rods for buildings under 75 feet high?
• Which of the following is not an acceptable fastener according to existing standards?
• Which factor is not relevant in determining the size or type of lightning protection needed for a building?
• A bimetal connection is used to join which types of cables?
• Which type of cable conductor is considered the largest?
• Which of the following materials is discouraged for use in grounding systems?
• Which of the following materials may NOT be used for air terminals?
• When is it acceptable to use exposed cable in a lightning protection system?
• Which of the following is NOT a required UL lightning protection system label?
• What is the primary function of an air terminal in a lightning protection system?
• What is the minimum lead anchor size recommended for bases and cable holders?
• What does a metal chimney with a thickness of less than 3/16 inch require?
• Class II solid copper points must be of what minimum diameter?
• Which of the following is NOT a restriction on the use of aluminum conductors?
• What is a fastener used for in a lightning protection system?
• Class I tubular air terminals must have an outside diameter of at least what measurement?
• What factors affect vulnerability to lightning?
• Which element is crucial for preventing side flash in a lightning protection system?
• What does a lightning protection risk assessment aim to identify?
• In a lightning protection system, why is it critical to have low impedance connections?
• In copper installations, how deep must connections to ground rods be placed?
• Which nail size is larger: 10d or 12d?
• What was invented first as part of lightning protection systems?
• Do requirements for exposed systems also apply to concealed installations?
• In lightning protection, what is most important to ensure?
• Which air terminal should be installed on a heavy-duty smokestack?
• How deep must a driven rod ground extend into the ground?
• What is the purpose of secondary conductors in lightning protection systems?
• Which of the following air terminals must be lead covered when installed on smokestacks?
• In an extensive interior metal water supply system, what must be done if a section of plastic is present?
• How frequently should a continuous metal gravel guard be bonded to the system when adjacent to a roof perimeter cable?
• Which type of metal is commonly used for bonding in lightning protection systems?
• What must the required connection between the lightning protection system and the water system use?
• Cable holders on exposed roof cable runs must be spaced at intervals not exceeding what distance?
• What is the primary function of an air terminal in lightning protection systems?
• Which option is not an approved method for assuring continuity between cable and metallic tubing with the conductor running inside?
• What thickness of steel smokestacks requires air terminals under standard LPI-175?
• When air terminals and conductors are mounted on a masonry parapet, how are the mounting bases typically secured?
• Can a television or radio antenna bonded to a lightning protection system prevent lightning currents from entering the structure?
• Class II solid aluminum points must be of what minimum diameter?
• What is the minimum spacing required for multiple 10 feet deep ground rods installed in sandy or gravelly soils?
• What does the term "Class I" materials refer to in lightning protection?