Colorado Journeyman Practice Exam

These questions are part of the practice quiz. Start practicing

• Which of the following components provides a protective measure by interrupting the flow of electricity in case of a ground fault?
• Given a transformer with a primary rating of 1000 volts and rated primary amperage of 5 amps, the overcurrent protection device rating shall not exceed __________?
• To what maximum percentage can splices and taps fill a surface nonmetallic raceway?
• What device is used to prevent overcurrent in electrical circuits?
• How much change in length would 100 ft of PVC conduit experience with temperature fluctuations from -10°F to 110°F?
• The definition of a forming shell as used in a swimming pool is best described as which of the following?
• What determines the lifting load limit for existing structures when installing new electrical services?
• In an electrical circuit, what does GFCI stand for?
• What is a major benefit of having service entrance cables rated for wet locations?
• What is the primary code book used for the Colorado Journeyman Exam?
• Which code revision year is commonly used as a reference for current electrical installations?
• What is the maximum secondary circuit voltage for sign transformers?
• What term is used for mandatory rules in the NEC characterized by the use of the word "shall"?
• What is a common method to calculate load for a dwelling unit?
• What is the primary function of a junction box in electrical systems?
• What are feeder conductors used for?
• Which of the following describes the Code requirements for a 125-volt, 20-ampere outdoor receptacle in a bathroom?
• A __________ shall be installed where cables emerge from raceway used for mechanical support or protection in accordance with code guidelines.
• Remote-control circuits to safety-control equipment classified as Class __________ involve a direct fire or life hazard.
• Which type of cable is permitted to be used as a substitute for OFCR?
• What is the allowable ampacity reduction percentage for raceways with 10 current-carrying conductors according to standard guidelines?
• What is the function of a ground fault circuit interrupter (GFCI)?
• What is the minimum ampacity permitted for the feeder supplying a group of single-phase squirrel-cage induction motors totaling 32.5 HP?
• What designation is used for overhead power lines that are less than 600 volts?
• What is the maximum time-delay fuse permitted for a No. 1 AWG copper THHN motor feeder for five 480-volt, 3-phase induction motors?
• Transformers and transformer vaults shall be __________ to qualified personnel for inspection and maintenance.
• What is the primary material used for electrical service conductors in Colorado?
• What is the allowable ampacity for a 30 AWG conductor used as part of the control wiring in a permanent amusement attraction?
• What type of circuit wiring cannot be run through raceways according to the NEC?
• Which of the following is typically required for outdoor wiring installations?
• What is the primary purpose of grounding in electrical systems?
• In a 120/240-volt, single-phase, 200-ampere service, what is required for the main bonding jumper connection to the service equipment enclosure?
• What must be provided between conductors and armor in armored cable installation?
• What is a legal requirement for repairing an electrical code violation in Colorado?
• What tool is commonly used to measure electrical current?
• In regards to freestanding receptacles, which of the following is true?
• What is the minimum wire size for a bonding bar connected to the equipment grounding conductors in the service equipment enclosure?
• What is the minimum size THWN aluminum service conductor permitted by Code to supply a 400-ampere, 120/240-volt service to a single family dwelling?
• Each patient location in a health care facility shall be supplied by at least __________ branch circuits.
• What is the maximum number of No. 14 AWG THHN copper conductors allowed in 3/8-inch flexible metal conduit using external clamp-type fittings?
• What is the feeder demand load for four 14kW residential ranges?
• What is the maximum riser length allowed for a service drop in residential installations?
• What is the maximum permitted cord- and plug-connected load to a 15-ampere receptacle?
• Under what circumstance can an electrical panel be mounted higher than 6.5 feet above the ground?
• What is the term used for notes that provide additional information but are not mandatory?
• What determines the number of branch circuits required for a residential structure?
• What is the minimum distance for nonmetallic-sheathed cable from the edge of a scuttle hole in an attic?
• What is the maximum number of 15- and 20-ampere receptacles permitted in a single circuit?
• In Colorado, what is the estimated penalty for performing electrical work without a license?
• What adjustment factor is applied to 4 pieces of 12/2 MC cable supplying 240-volt single-phase loads?
• "Connected to the ground or to a conductive body that extends the ground connection." refers to which term?
• What is the voltage drop for a three-phase, 3-wire, 240-volt circuit with a load of 5 HP located 110 ft away from the panel using No. 8 AWG copper THHN?
• Which type of circuit breaker is used to protect the primary side of a transformer with a secondary connected to industrial equipment?
• What type of fault is mainly prevented by the use of GFCI devices?
• In residential installations, which type of conductor is typically used for short runs in walls?
• Which of the following built-in appliances can be connected using a cord and plug in a dwelling?
• How many No. 4/0 THW copper conductors may be installed in a 2-1/2-inch EMT conduit nipple six inches long installed between a panel and a wireway?
• How long must electrical records be retained according to Colorado regulations?
• What is the function of a disconnect switch in an electrical system?
• What is the minimum size of the service entrance conductors for a dwelling unit with five 2-wire branch circuits?
• What is the preferred method for grounding a service in Colorado?
• What is the maximum interval at which Liquidtight Flexible Metal Conduit must be supported?
• Which Code article specifies the minimum requirements for service conductors feeding a 400-ampere service?
• What is the minimum size required for secondary conductors if a transformer has no secondary conductor protection?
• What is the proper method for splicing two conductors together?
• What type of wiring is commonly used in residential electrical systems in Colorado?
• What is the minimum ampacity required for branch-circuit conductors for a 115-volt, 3 HP motor with a nameplate current rating of 36.5 amperes?
• What type of circuit protects against short circuits and overloads?
• Which section of the NEC addresses outdoor and special-purpose installations?
• What is the code section that specifies requirements for working safely near overhead power lines?
• What is the minimum size copper wire allowed for residential branch circuits in Colorado?
• What is a feeder in electrical systems?
• What is the purpose of the Colorado Electrical Board?
• What constitutes a violation when installing receptacles in a residential dwelling?
• What feature must dry-type transformers have when installed outdoors?
• What type of receptacles must be installed in areas where electrical diagnostic equipment or portable lighting is used?
• How often must electrical installations in commercial buildings be inspected?
• Which of the following is not an approved fixed wiring method for a place of assembly?
• What percentage of campsites in a new recreational vehicle park must have a 50-ampere 120/240-volt supply installed?
• What is the primary purpose of using conduit in electrical installations?
• What is the term for the conductive paths that provide a ground-fault current path in electrical equipment?
• When passing over roofs, coaxial cables shall have at least __________ ft of clearance from all points on the roof.
• A multiwire branch circuit must have a means to disconnect all un-grounded conductors in what manner?
• What percentage of ampacity must be applied to conductors when housed together in a raceway?
• What is a branch circuit with two or more un-grounded conductors called when it has equal voltage to a grounded conductor?
• How close to the nearest edge can NMC be installed when parallel to framing members?
• Code requirements state that the disconnecting means for a circuit providing power to a pump for an LP-Gas filling station must include which of the following?
• Which of the following equipment does Article 430 primarily apply to?
• What is the required insulation temperature rating for branch-circuit conductors near a ballast?
• What is the recommended accepted standard for branch circuit protection of electric motors?
• A mobile home park with 26 mobile homes having a computed load of 22,000 volt-amperes requires service conductors with what ampacity?
• What is the largest circuit breaker allowed to protect a 25 HP three-phase, 480-volt induction motor?
• What is a common application for OFCP cable?
• What is a significant benefit of using AFCI breakers in residential settings?
• What is the minimum height for installing a residential service entrance?
• What is a common installation practice for mounting electrical panels?
• Which of the following uses is not acceptable for flexible cords?
• The listed exposed work cover is permitted to serve as the grounding and bonding means when mounted correctly. What is required for this?
• What does the term "ampacity" refer to?
• A device that connects bonding conductors for communication systems to the grounding electrode system is known as _____________.
• What is the primary purpose of AFCI protection in residential circuits?
• Are sign transformers covered by Article 450?
• What is called the "electric power production and distribution network"?
• Which part of the Colorado Administrative Code contains the laws regulating electrical installation?
• What does the acronym "NEC" stand for?
• Each kitchen is required to have a minimum of how many small appliance branch circuits?
• According to code, how many telephone outlets are required for new dwellings?
• Which of the following is a common cause of electrical fires?
• What is the definition of a "lighting outlet" in NEC terms?
• For residential electrical systems, what is the required minimum number of circuits in the kitchen?
• Which cable type is permitted to be used as a substitute for BLX?
• Which color indicates a ground wire in residential wiring?
• What is the minimum height for outdoor service conductors to ensure safety?
• What is the minimum voltage for low voltage lighting systems?
• How far must an outlet for laundry equipment be installed from the intended location of the appliance?
• In regards to flexible cords, which situation is permissible?
• Which of the following best describes the purpose of an electrical transformer?
• What type of insulation is required for conductors located in a damp environment?
• Which section of the NEC covers the general requirements for electrical installations?
• What do you call the electrical system grounding point created by a common ground?
• Which section of the NEC deals with swimming pool installations?
• A ground rod must be a minimum of how many feet in length?
• What must replace a two-wire receptacle in a bathroom when no grounding conductor is available?
• What is the minimum size aluminum equipment-grounding conductor required for a feeder of four three-phase motors?
• If a raceway is installed in a wet location above grade, how is its interior classified?
• Class 2 and Class 3 remote control and signaling circuit wiring shall not be secured to what?
• For a grounded 400-ampere AC system, what is the minimum wire size permitted for the grounding-electrode conductor connected to a rod or pipe electrode?
• Which type of circuit breaker is designed to protect against ground faults?
• What is required for all electrical installations in terms of accessibility?
• For a single-phase motor fed from an underground source, where should the motor overload unit be placed?
• What does the color black typically represent in residential electrical wiring?
• What is the operating maximum voltage for a typical residential electrical system in Colorado?
• The conductive path installed to connect normally non-current carrying metal parts of equipment to the grounded conductor is called the ___________?
• How often is the National Electrical Code updated?
• Sills or curbs in transformer vaults, shall have a minimum height of __________.
• What is the minimum age requirement to take the Colorado Journeyman Exam?
• Which of the following is not required to be bonded on a hot tub installation?
• What is the minimum height above finished grade for receptacles located outside?
• What is the allowable voltage drop for branch circuits according to the NEC?
• For motors rated at over 10 HP, which standard must be referred to for necessary protection?
• How many grounding electrodes are required for a residential service system?
• What is the primary insulation rating required for conductors in damp locations?
• What is the purpose of a service lateral?
• What is the primary function of a device in an electrical system?
• What Code requirement applies to a wall receptacle installed within 6 feet of a wet bar in a family room?
• In Colorado, what is the code enforcement body for electrical work?
• What is one key factor when determining the ampacity of a motor circuit?
• According to electrical codes, how far from a scuttle hole should nonmetallic cable be placed unless protected by guard strips?
• "The greatest root-mean-square difference of potential between any two conductors of the circuit concerned" is known as what?
• In a 1,600 sq. ft. dwelling unit with 74 receptacle outlets, what is the calculated feeder load for lighting and other loads?
• What is the maximum number of disconnecting means required for a 240/120-volt three-wire feeder installed underground from a dwelling to a detached garage?
• The overcurrent protection device on the primary side of a transformer operating at less than 1000 volts must be set at no more than __________ percent of the transformer’s rated primary current?
• How are circuit conductors identified according to the NEC?
• What is the primary purpose of a circuit breaker?
• A "park trailer" is defined as having a gross trailer area not exceeding __________ sq. ft. in set up mode.
• For a 10kVA single-phase transformer with a 30 amp circuit breaker on the primary, what is the minimum size allowed for secondary conductors?
• Which component is essential for providing safety in wet locations when referring to electrical installations?
• According to NEC code, how many receptacles are allowed in a kitchen area for small appliances?
• What kind of protection is required between conductors and armor in armored cable?
• When calculating demand loads for a dwelling unit, which types of loads must be considered?
• What type of conduit should a feeder from a dwelling unit to a detached garage be installed in?
• How is "voltage" defined?
• What is the common term for a circuit that uses both 120V and 240V?
• Which article of the NEC pertains to hazardous locations?
• Which of the following cannot be used as a grounding electrode?
• A listed package spa assembly with a factory-installed ground-fault circuit-interrupter is connected indoors to a wall receptacle. What is required for compliance?
• What is the purpose of using multi-wire branch circuits?
• What is the maximum number of outlets allowed on a 15-amp circuit in a residential setting?
• How many outdoor receptacles are required at a dwelling unit?
• What is the acceptable temperature range for residential wiring in Colorado?
• What section of the NEC specifies the requirements for temporary wiring?
• Which term defines "a unit of an electrical system that carries or controls electric energy as its principal function"?
• What is the minimum number of receptacles required for a 6-foot wide kitchen counter top?
• What should be considered when choosing fuses for motor circuits?
• What is the minimum height for a service drop above a residential driveway?
• In one- or two-family dwellings, what is the maximum length for the primary protector bonding conductor or grounding electrode conductor?
• What safety test must GFCI outlets pass before installation?
• What is the primary function of a GFCI protected receptacle?
• The total square inch area of a three-inch intermediate metal conduit is __________.
• What is the definition of electronic computer processing equipment?
• Which of the following is not a purpose of electrical codes?
• Which circuit component is crucial for protecting against voltage spikes?
• What is the minimum ampacity required to supply a 12.0 kW electric furnace with a 1/3-HP motor at 240 volts?
• What type of receptacle is required in outdoor locations according to the electrical code?
• What device is required to protect circuits that are installed in locations prone to moisture?