PSI Journeyman Online Practice Exam

Browse all practice questions for the PSI Journeyman Online Practice Exam. Search by topic, open any question and review its full explanation, then test yourself in the practice quiz.

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Understanding Fire Ratings for Electrical Vaults with Equipment Over 600 VoltsWhat is the minimum fire rating for electrical vaults housing electrical equipment over 600 volts?Understanding Minimum Wattage Ratings for Lampholders Under 50 VoltsWhat is the minimum rating for a standard lampholder used for circuits and equipment operating at less than 50 volts?Understanding Overcurrent Protection for Non-Motor-Operated AppliancesIf a branch circuit supplies a single non-motor-operated appliance, what is the maximum rating of overcurrent protection if the appliance is rated at 13.3 amperes or less?Understanding the Difference in Potential: Why Voltage Matters in Electrical CircuitsWhat is defined as the greatest root-mean-square (effective) difference of potential between any two conductors of a circuit?Understanding the Function of Fittings in Wiring SystemsA fitting in a wiring system primarily serves what type of function?Understanding the Height Requirement for Installing Overcurrent DevicesHow high above the floor or working platform should overcurrent devices be installed, disregarding exceptions?Understanding the Importance of Ceiling Fan Support CertificationWhat certification should a fixture box have to ensure safe ceiling fan support?Understanding the Kilowatt-Amperes Range for a Motor with Code Letter DWhat is the kilowatt-amperes range for a motor with a code letter of D, when locked rotor?Understanding the Limitations on Conductor Fill in Underfloor RacewaysWhat percentage of the interior cross-sectional area of the underfloor raceway can the combined cross-sectional area of all conductors or cables not exceed?Understanding the Minimum Size for a Solid Conductor Installed in a RacewayWhat is the minimum size for a solid conductor installed in a raceway?Understanding the Power Factor in 3-Phase Electrical SystemsWhat is the power factor of a 3-phase load that uses 11,250 watts, with 208 volts applied and 35 amperes current per phase?Understanding the Practical Uses of Smart SwitchesWhat is a smart switch used for?Understanding the Role of a Load Center in Your Electrical SystemWhat is the purpose of a load center?Understanding the Role of a Surge Protector in Your Electrical SystemWhat is the primary purpose of a surge protector?Understanding the Safe Use of Optical Fiber Cables in ConduitsUnlisted nonconductive outside plant optical fiber cables are not permitted in which type of raceways?Understanding Where Flexible Metal Conduit Can Be InstalledIn which locations is the installation of flexible metal conduit permitted?What bonding means in electrical installations and why it matters for safetyWhat does the term "bonding" refer to in electrical installations?What Electrical Device Protects You from Shock in Wet Areas?Which electrical device is designed to prevent electric shock in wet areas?Where You Shouldn't Install Ceiling FansIn which locations is ceiling fan installation typically discouraged?
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  • Approximately how many kilowatts does a three-phase, 480-volt AC motor that draws a current of 52 amperes and has a power factor of 88% use?
  • Which of the following is a common feature of surge protectors?
  • What should be done before working on electrical circuits?
  • Which type of service-entrance conductors are allowed to be contained in a cable tray?
  • What is the purpose of conduit fittings?
  • What is the recommended maximum total voltage drop on both feeders and branch circuits to the farthest outlet?
  • In which application is red brass rigid metal conduit permitted?
  • If a resistor has the colored bands orange, red, brown, and silver, what is its value?
  • In which application is the installation of UF cable permitted?
  • What type of grounding system is commonly used in residential installations?
  • What type of circuit protects against overload and short circuits?
  • What is the minimum size grounding equipment conductor required for a photovoltaic system?
  • What is the maximum length for an equipment bonding jumper installed outside of a raceway?
  • What is the minimum size EMT conduit required for three 14 AWG, six 12 AWG, and three 8 AWG conductors, all of which are THHN solid wires?
  • What is the recommended distance a non-self-supporting ladder should be placed from a vertical structure?
  • What can be a visible sign of a faulty surge protector?
  • What is the construction requirement for the floor of an electrical vault for conductors operating over 600 volts, nominal?
  • What is the maximum allowable voltage drop in a residential branch circuit?
  • How long are temporary electrical power and lighting installations permitted for holiday decorative lighting?
  • What voltage drop percentage indicates a potential power loss issue in a low-voltage conductor system?
  • What would happen if a ceiling fan is not supported correctly?
  • What is the common use for a junction box in electrical systems?
  • In electrical terminology, what does the abbreviation "GFCI" stand for?
  • What is the maximum overcurrent protection for a 10 AWG copper conductor?
  • One horsepower is equivalent to how many watts?
  • What type of wiring method is allowed for exposed locations in residential buildings?
  • When installing a ceiling fan, what safety measure is essential?
  • What system is required for all employers to create in relation to employee safety and emergency procedures?
  • Which conductor size is required for a 20-amp residential branch circuit?
  • What type of electrical device can be damaged by voltage spikes?
  • What is the total ampere rating of a feeder supplying a continuous lighting load of 45 amperes and a single motor load of 30 amperes?
  • What is the ideal location for smoke detectors in a home?
  • What is the primary advantage of using LED lighting over traditional incandescent bulbs?
  • What does "hardwired" refer to in electrical installations?
  • What color is typically associated with grounding screws in electrical applications?
  • What is the voltage limit for using plug fuses in circuits with a grounded neutral point?
  • When the disconnecting means of a transformer is remote, what requirement must it meet?
  • For how long must storage batteries for emergency systems maintain total load?
  • Which of the following describes a load in an electrical circuit?
  • For a feeder supplying continuous loads, the minimum conductor size must have an allowable ampacity of at least what percentage of the continuous load plus the noncontinuous load?
  • What percentage of the nameplate current rating must the conductors from the generator terminals to the first distribution device(s) be rated for?
  • What is the maximum rating for appliances that a branch-circuit overcurrent device can serve as a disconnecting means?
  • How much power is lost at a bad splice with a measured resistance of 0.5 ohms in a circuit drawing 40 amperes?
  • What is the standard voltage for household outlets in most countries?
  • What is the minimum clearance required over residential property for overhead spans of conductors rated under 1,000 volts?
  • What should the insulation resistance value be for most cables to ensure safety?
  • What are the two types of electrical current?
  • What is the maximum number of 12 AWG conductors permissible in a 4" x 1-1/2" square box?
  • What is the function of a transformer in an electrical circuit?
  • How often should electrical panels be inspected?
  • What is Ohm's Law?
  • What is required for the installation of ceiling fans in terms of support?
  • How long can temporary electrical installations be used during holidays?
  • Surge protectors are most commonly used in which setting?
  • What percentage of the area can be filled by conductors, including splices and taps, in a wireway?
  • Who is primarily responsible for providing head protective gear to workers at risk of head injury?
  • What type of protection must be in place for a circuit supplying appliances with varying current limits?
  • What type of circuit is designed to allow multiple devices to share the same power source?
  • The service disconnecting means may not be installed in which location?
  • What is the maximum voltage rating for which type MV cable is permitted for use?
  • What safety device can detect an arc fault and disconnect the power?
  • What is the primary safety concern when working with electrical installations?
  • What is the maximum spacing for supports of 10 AWG copper conductors in a vertical raceway?
  • Ceiling fans are designed to circulate air effectively when installed at what height?
  • For appliances rated over how many wattage can the branch-circuit overcurrent device still serve as the disconnect?
  • When installed in the same cable tray, cables operating at over 600 volts shall be of which type?
  • What is the maximum distance that emergency controls for an attended self-service motor fuel dispensing facility shall be located from the dispensers?
  • What does NEC stand for?
  • What is the purpose of a GFCI outlet?
  • Which feature does NOT typically belong to surge protectors?
  • What is a conduit used for in electrical installations?
  • What is the maximum size of drain holes allowed in signs and outline lighting system equipment for wet locations?
  • Which type of fuse is designed to blow quickly under short-circuit conditions?
  • What is the approximate power consumed by a 15 kW heat strip rated 230 volts when connected to a 208-volt circuit?
  • What is the maximum permitted overcurrent device rating for an autotransformer with a rated input current of less than 9 amperes?
  • What is the minimum working space requirement in front of electrical panels?
  • What is the minimum separation between communications wires and cables on buildings and lightning conductors?
  • Conductors supplying a single motor in a continuous duty application must have an ampacity of at least what percentage of the motor full-load current rating?
  • In a fire alarm system, what is the minimum size for single conductors?
  • What is an askarel?
  • What is a recommended maintenance task for surge protectors?
  • What does a multimeter measure?
  • The use of surge protectors can help prevent damage from what electrical phenomenon?
  • What is the difference between a series and parallel circuit?
  • What is the voltage drop for a 3-hp pump installed 220 feet from a 220-volt main service using 12 AWG solid wire?
  • What is the approximate power loss for a conductor in a 208-volt circuit with a 5% voltage drop and a current flow of 15 amperes?
  • What is the minimum distance a ladder base should be placed from a structure for stability?
  • What is the primary purpose of the National Electrical Code (NEC)?
  • Which part of a bulk storage plant is classified as Class 2, Zone 2?
  • What is the minimum distance that must be provided between the top of an unshielded switchboard and a combustible ceiling?
  • What is the minimum size copper conductor permitted for use for a 6,000 volt service?
  • Which color indicates a 20-amp circuit in an electrical system?
  • In a three-phase system, what is the phase difference between each line?
  • Snap switches connected to aluminum conductors must be marked CO/ALR if they are rated at what maximum amperage?
  • In a DC system, which color finish can be used to identify the positive ungrounded conductor?
  • What is the maximum voltage drop allowed for any branch circuit operating at 120 volts line-to-line, serving sensitive electronic equipment?
  • What is the wire gauge size that is often used in residential electrical systems?
  • How many employees are required for an employer to have a written emergency action plan?
  • How many threads must be engaged if machine screws are used to fasten bonding jumpers?
  • In residential units, what is the maximum horizontal distance allowed from a receptacle outlet?
  • What is the common insulation type for underground feeder cables?
  • What is the ampere load of a 3-hp single-phase motor operating at 240 volts with an efficiency rating of 83%?
  • What unit measures electrical resistance?
  • What is required for electrical installations in wet locations?
  • How is electrical current measured?
  • Where are flat cable assemblies allowed to be installed?
  • What does AFCI stand for and what is its primary purpose?
  • What is defined as an unintentional electrically conductive connection between an ungrounded conductor and normally non-current-carrying conductors?
  • How far must the work space extend from the grade, floor, or platform for equipment that is 60 inches in height?
  • The length of the pull box must be at least how many times the outer diameter of the largest shielded or lead-covered conductor entering the box?
  • Surge protectors also help in reducing which risk associated with electrical devices?
  • What is the maximum distance apart that intermediate members used on scaffolding, such as balusters or additional rails, can be?
  • What type of circuit is used to protect against overloads and short circuits?
  • What is a common voltage level for residential lighting circuits?
  • What is the function of a junction box in electrical installations?
  • A motor controller disconnecting means shall be permitted to be out of sight of the controller for motor circuits over how many volts?
  • How many amperes does a 1500-watt heater draw if connected to a 120-volt supply?
  • What is the acceptable height for a residential light switch installation?
  • Unless otherwise provided, how often must MC cables be secured?
  • Information technology equipment can be connected to a branch circuit by a power-supply cord with a maximum length of how many feet?
  • What is required for outdoor electrical installations in terms of cable protection?
  • What type of circuit breaker is designed to protect against ground faults?
  • What type of electrical equipment is used to change voltage level or waveform?
  • What is the minimum breaking strength required for lifelines used in fall protection?
  • What is the required overcurrent protection size for feeders and branch circuits supplying electric vehicle supply equipment, based on maximum load?
  • Dry-type transformers rated over which voltage must be installed in a vault?
  • What is the minimum depth for burying direct-burial cable?
  • What type of insulation rating is generally required for wiring in a residential attic?
  • When an AC system is grounded, grounded conductors must be routed with ungrounded conductors at what voltage level?
  • In an electrical installation, what does the abbreviation "EMT" stand for?
  • How close can equipment grounding conductors of bare or insulated aluminum or copper-clad aluminum be terminated to the earth?
  • What is the maximum weight of a luminaire that can be supported by the screw shell of a lampholder?
  • In which location is AC cable prohibited from being used?
  • How far must the disconnecting means for all ungrounded conductors be located from the inside walls of a pool?
  • In electrical terms, what does 'AC' stand for?
  • What is the purpose of a phase converter?
  • The portion of a grounding electrode conductor connected to a rod or pipe must be at least what size?
  • What is the minimum free space requirement around a transformer?
  • If a circuit breaker does not have an interrupter rating shown, what is the standard interrupter rating?
  • What type of overcurrent device is typically rated for fast-acting protection?
  • Which of the following materials is commonly used as a conductor for grounding electrodes?
  • What is the minimum size of the aluminum equipment grounding conductor required when the overcurrent protection ahead of a branch circuit or feeder is sized at 600 amperes?
  • An electrical appliance rated at 1,500 watts connected to 120 volts has what resistance?
  • A panelboard for a mobile home shall be rated not less than what?
  • How many quarter bends are allowed in IMT between pull points?
  • What is the maximum permitted length of the branch-circuit wiring for a 12 AWG conductor with a listed outlet branch-circuit type arc-fault circuit interrupter?
  • What does a busbar do in a panelboard?
  • In a DC system, what color finish can be used to identify the negative ungrounded conductor?
  • What color finish should a screw have if it serves as the only bonding jumper?
  • Which method is NOT acceptable for identifying different systems in combination surface metallic raceways?
  • Which tool is used to test for the presence of voltage?
  • What is the formula for calculating electrical power?
  • What is the minimum distance that lamp tie wires, mounting screws, clips, and decorative bands on glass must be spaced from lamp terminals to not require grounding?
  • For a continuously loaded appliance rated at 30 amperes, what is the minimum branch circuit rating required if the circuit device is not listed for continuous loading?
  • Which type of cable must be marked by means of a printed tag attached to the coil, reel, or carton?
  • Rod-type grounding electrodes of stainless steel must have a diameter of at least which of the following?
  • What is the minimum size for a copper-clad aluminum underground service conductor?
  • Which type of service-entrance cable has a flame-resistant and moisture-resistant covering?
  • At what depth must all employees receive training on working in confined and enclosed spaces when working in open pits?
  • Which color of lead wire indicates a circuit voltage of 240 volts, nominal for electric space heating cables?
  • What is the main purpose of a disconnect switch in an electrical system?
  • Alternating-current systems of less than 50 volts shall be grounded when supplied by transformers exceeding which voltage to ground?
  • What is the main difference between type AC and type MC cable?
  • A continuous load is defined as a load where the maximum current is expected to last for at least how many hours?
  • High-impedance grounded neutral systems are permitted for which type of system?
  • Which wire color is typically used for a ground wire in residential wiring?
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