NCCER The Electrical Industry (26101-23) Practice Test

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• In a typical 120/240 V residential system, what color is the equipment grounding conductor?
• Which of the following best describes the scope of the safety duties listed for supervisors?
• Which of the following best describes the main purpose of a grounding electrode system?
• How do ambient temperature and conductor bundling affect ampacity?
• During which stage are receptacles, switches, devices, and fixtures installed and connected to the panelboard?
• What is back EMF and why is it important in motor operation?
• Residential service in the United States is typically supplied at which voltage?
• After finishing apprenticeship, training is over.
• How does a thermal overload protection device operate?
• Which document establishes the energy-control procedures used to de-energize equipment for maintenance?
• What does OJL stand for in apprenticeship context?
• Which factors modify the allowable ampacity of a conductor?
• What is a motor starter?
• Which factors influence ampacity besides conductor size?
• Regarding tardiness and absenteeism, which is true?
• GFCI protection is required in which locations?
• During trim-out, which activity is commonly performed?
• What is meant by conductor temperature rating and why does it matter?
• Which stage involves installing devices and fixtures such as outlets and switches?
• What does AWG stand for and what does it indicate?
• In a series circuit powered by 120 V with a total resistance of 40 Ω, what is the current?
• Which of the following describes an equipment grounding conductor?
• Which environment would typically house motor control centers?
• Explain the difference between conductor ampacity and allowable ampacity.
• Copper-clad aluminum is an example of what category?
• Define a disconnect switch and where it is used.
• Which environment would an electrician work on a motor control center?
• What is the unit for real power?
• What information does an electrical wiring diagram provide?
• Ohm's law: If a circuit has 120 V and draws 6 A, what is the resistance?
• Which statement correctly pairs apprenticeship requirements for a DOL program?
• Which standard is primarily concerned with wiring rules and safety in electrical installations?
• Which phase involves installing outlets and switches?
• What is transformer polarity and how is it indicated?
• OSHA's primary mission is to?
• What is the unit for apparent power?
• If you see a safety violation on the job site, what should you do?
• Safety is whose responsibility?
• Which organization requires supervisors to train you to do the work safely, provide PPE, warn you of specific hazards, and supervise for safety?
• OSHA requires you to report ________ and unsafe conditions directly to your supervisors.
• OSHA standards for general industry are listed in which CFR?
• Which statement correctly describes EMT conduit?
• Which statement about competency-based training is true?
• During which stage of electrical installation are the panelboard, wiring, and device boxes installed?
• If sick days are treated as floating holidays, which cost must still be paid by the employer?
• Reactance in an AC circuit is the opposition to current caused by which elements?
• A DOL apprenticeship requires ______________ of classroom instruction per year.
• In industrial facilities, who maintains electrical systems most likely?
• What is the typical source of standards for the NCCER electrical training program?
• Tract homes are typically wired by which group?
• Which statement correctly pairs apprenticeship level with on-the-job hours for the program?
• Differentiate grounding and bonding in electrical systems.
• What insulation temperature rating is commonly used for THHN in dry locations?
• What is the purpose of a panelboard?
• Which statement best describes insulation resistance testing?
• Which environment would most likely require specialized knowledge of hazardous locations?
• The minimum standards for the safe installation of electrical systems can be found in which document?
• Safety standards that apply to construction are published in which CFR?
• The ________________ of 1970 requires employers maintain a safe workplace for all employees.
• What is impedance in an AC circuit?
• What is the primary function of a transformer?
• Name two common types of grounding electrodes used on buildings.
• In addition to OSHA safety standards, name two standards that relate to electrical systems and devices.
• In what year was the OSHA Act enacted?
• RMC is a type of conduit.
• Which statement about grounding and bonding is accurate?
• What term describes the point where the building connects to the electrical supply from the utility?
• Which NEC article covers overcurrent protection?
• Which term describes the network that carries electrical wiring from the service entrance to branch circuits?
• PVC conduit is characterized as which type of material?
• What is a digital multimeter used to measure?
• A DOL apprenticeship requires ______________ of on-the-job learning/training per year.
• Which component's primary role includes interrupting current during an overload?
• What is an AFCI device and what condition does it protect against?
• Define apparent power, real power, and reactive power and give their units.
• What is the purpose of a grounding electrode system?
• Which of the following statements about job site safety is true?
• When OSHA identifies unsafe practices, which action is most likely to occur?
• Which of the following is an example of a raceway?
• Industrial electricians are usually split into two groups.
• In motor operation, back EMF can affect starting current by which mechanism?
• What device protects a branch circuit from overload and short circuits?
• What is a primary purpose of conduit body fittings?
• During construction, which stage is typically associated with installing major electrical equipment such as the panel boards?
• Which statement best explains why sick days should not be treated as floating holidays?
• Which document reflects OSHA's requirement to maintain a safe workplace?
• Entry into an apprenticeship program is likely to require which of the following?
• A ______________________ installs grounding systems, conductors, and raceways in substation facilities.
• According to OSHA standards, any company with more than ________ employees must keep records of work-related injuries and illnesses.
• Conduit is part of the ______.
• A Youth Apprentice Program allows you to complete as much as two years of your apprenticeship before you have finished high school.
• Why is arc-flash boundary defined in NFPA 70E?
• What type of electrician would respond to make repairs in a residential environment?
• Which meter setting is used to check if two points are connected with low resistance?
• What is a single-line diagram (SLD) used for?
• A major difference between residential and commercial wiring is that commercial wiring is usually installed in metal conduit.
• Which statement about apprenticeship licensing is true?
• Which type of electrician would be least likely to work in a residential environment?
• How do you perform a continuity check with a multimeter?
• Which statement is true about apprenticeship?
• Competency-based training means you must demonstrate the skills necessary to perform hands-on tasks before advancing.
• Which occupation is most likely to perform electrical work on ships and boats?
• Commercial wiring is typically installed in which type of enclosure?
• Which statement best describes a digital multimeter's capabilities?
• Which NEC table is commonly used to determine conductor ampacity for a given insulation and temperature rating?
• In which environment would a commercial electrician most likely be working?
• All industrial electricians need to be familiar with the requirements of working on which equipment?
• An ______ works with three-phase power, motors, and motor control systems.
• It's okay to take scrap pieces home as long as you don't think they'll be needed on the job.
• OSHA standards for general industry are covered in which CFR part?
• The _____ connects the commercial power to the premises wiring system.
• Which statement best describes the primary function of a panelboard?
• What is the purpose of arc-flash PPE and how is the required level determined?
• Which term describes the total opposition to current in an AC circuit?
• How is lighting efficacy calculated?
• What is the typical service voltage for residential service in the United States?
• Which statement best defines the raceway system in commercial wiring?
• How is voltage drop calculated for a branch circuit?
• Which statement accurately describes insulation resistance testing?
• Which setting would a commercial electrician be most likely to work in?
• If reactive power Q is zero, which statement is true about apparent power S and real power P?
• A four year apprenticeship requires at least ___________ of classroom instruction.
• Which component is typically installed during the trim-out stage?
• The termination of devices and fixtures is completed during which construction phase?
• Commercial electricians typically work as subcontractors for which party?
• As a ______, you will install, maintain, and repair the engines and electrical systems on ships and boats.
• What does a single-line diagram primarily illustrate?
• When sizing a equipment grounding conductor, what is the main consideration?
• Which statement describes who typically hires commercial electrical contractors?
• The NCCER electrical training program applies DOL standards and is a(n) __________ program.
• What happens when a protective device operates to clear a fault?
• What does power factor tell you about an electrical load?
• Hazardous-location knowledge is most relevant to which environment?
• In commercial systems, the wire is run in a conduit that makes up the ______.
• Panelboards in residential wiring are typically installed during which phase?
• Which equation correctly relates apparent power S, real power P, and reactive power Q in AC circuits?
• Lumens define what aspect of a lighting source?
• In residential wiring, which cable type is most commonly used?
• A 24 V source is connected to a resistor of 8 Ω. What is the current?
• OSHA can ________________ to ensure compliance with safety rules.
• A four year apprenticeship requires at least ___________ of on-the-job learning/training.
• In the American Wire Gauge system, how does the gauge number relate to conductor size?
• In a parallel circuit with two equal resistors of 6 Ω each connected to a 12 V source, what is the total current?
• OSHA requires that employers provide a safe and hazard-free job site.
• Phases of residential electrical wiring include Rough-in, trim-out, testing, and troubleshooting.
• A residential wiring system typically uses which type of cable?
• What is the primary purpose of lockout/tagout (LOTO) procedures in electrical work?
• Who sets minimum standards for apprenticeship training programs?
• What device is used to measure high insulation resistance, typically in the megohms range?
• In commercial wiring, which enclosure is commonly used?
• What is conduit fill and why must it be controlled?
• The main panel board enclosure would probably be installed in the _____ stage.
• What is a GFCI and where must it be installed in wet or damp locations according to NEC?
• Which statement is true about commercial electrical work?
• What does an insulation resistance test measure?
• What is the function of an overload relay in motor control?
• Which agency is primarily responsible for enforcing workplace safety standards in the United States?
• Your apprenticeship program requires ______ hours of OJL per year.
• If an employee takes a sick day, which costs must the employer still cover?
• Which device can be used to check continuity and also measure voltage, current, and resistance?
• Conduit is part of which installation category?
• Which organization publishes the National Electrical Code (NEC)?
• Name three common conductor materials.
• Device and fixtures would be installed during ______.
• Which phase of residential wiring comes first?