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AE 101 HW EXAM QUESTIONS AND
ANSWERS LATEST UPDATED
The conductor with the largest cross-sectional area for those that are listed is size: 14 AWG. 6 AWG. 1/0 AWG. 1 AWG. 10 AWG. - ANSWER 1/0 AWG. Some electrical conductors will oxidize, which is when a thin insulating layer is formed on the outside of the bare conductor when exposed to air. This oxidation will lead to high resistance connections that can fail over time. This oxidization will occur most rapidly on: - ANSWER aluminum conductors. A Conductors larger than size 8 AWG are generally constructed as multi-stranded conductors because: - ANSWER stranding makes the conductor more flexible. If a human is exposed to 60 - Hz alternating current through the body, the ampere level that can begin to invoke a response of pain is: - ANSWER 8 mA. An equipment grounding means is permitted to be: - ANSWER rigid metal conduit (RMC). Branch circuit conductors: - ANSWER are connected to electrical loads, such as motors. An electrical outlet is NOT considered to be: - ANSWER a switching or disconnecting device. Feeder circuit conductors: - ANSWER are used to supply other panelboards. An example of an overcurrent device would be a(n): - ANSWER circuit breaker. The purpose of overcurrent protection is to protect: - ANSWER conductors and conductor insulation from dangerous temperatures caused by excessive current.
A black insulated conductor size __________AWG, copper conductor is the smallest conductor that the National Electrical Code permits to be used as a grounded conductor that can be identified with white tape at each end and at any point it is visible and exposed. Any size of conductor smaller is required to have white insulation. - ANSWER 4 System grounding is the: - ANSWER connection of a conductor, in an electrical system, to the earth, to limit the voltage imposed by lightning or line surges. Conductors that are run overhead from the utility transformer and are connected to the service entrance conductors are commonly called: - ANSWER a service drop. Examine the diagram of the single-phase, 3-wire electrical system with 120 volts between wire A and the neutral, and 120 volts between wire B and the neutral. Between wire A and B, there will be: - ANSWER 240 volts. The purpose of the service disconnect is to: - ANSWER provide a means to turn off the power to the building or structure. To re-identify a black insulated, size 1 AWG conductor as an equipment grounding conductor it is: - ANSWER permitted to strip off the exposed insulation from the conductor. An equipment grounding conductor is the: - ANSWER conductor used to connect non-current carrying parts of electrical equipment to the grounded conductor or the grounding electrodes. The metallic elements that are either found or installed in the earth to connect the grounded circuit conductor to earth are called: - ANSWER grounding electrodes. The circuit wire which is only permitted to carry current in the event of an accident or malfunction, where electrical current is flowing outside of the normal circuit path, is identified with insulation which is: - ANSWER green.
It is not required to have any free conductor at a box, if the conductor entering the box is: - ANSWER not spliced or terminated in the box. Over metal studs, 1/2 inch dry wall is to be installed. An electrical box for a switch is installed concealed into the wall space. The maximum amount the box can be recessed back from the finished surface of this noncombustible material is: - ANSWER 1/4 inch. Unless marked otherwise, a box used to support a ceiling mounted luminaire (lighting fixture), must be able to support a weight of up to: - ANSWER 50 pounds. The style of box that is often installed during the construction phase of a building and is mounted so that it is recessed in the wall space before the walls are finished is: - ANSWER rough-in wiring. A three-gang box is designed to: - ANSWER contain three electrical devices, where each is on its own yoke. When installing a branch circuit it is NOT permitted to: - ANSWER splice conductors in a concealed space in a wall. A type NM 14-3, with-ground, cable has the following conductors - ANSWER one bare, one white, one black and one red wire within the outer jacket. A device for securing a cable to a box is required whenever metal boxes or enclosures are used. The device that is installed by the manufacturer that is found inside some boxes is called a: - ANSWER cable clamp. The insulation on wires in a type NM cable are required to be 90oC rated. The 90 oC rated wire from the below list is: - ANSWER type NM - B. To support a paddle ceiling fan, a box: - ANSWER must be listed as suitable for the purpose. Type NM, nonmetallic sheathed cable, size 10 AWG will have an outer jacket that is the color: - ANSWER orange.
The largest available trade size of rigid metal conduit (RMC) is: - ANSWER 6 inch. Wires may not rely only upon _____________ to maintain the electrical connection. - ANSWER solder The amount of free conductor that must extend out the front of a 3 x 3 x 2 metal device box is: - ANSWER at least 3 inches in length. When a conductor is spliced or terminated, the NEC requires a certain amount of "free conductor" to be left in each box. The amount of free conductor in a box must be: - ANSWER at least 6 inches in length. It is not required to have any free conductor at a box, if the conductor entering the box is: - ANSWER not spliced or terminated in the box. The wiring material that generally would be used where mobility of the materials is of the up most importance is the: - ANSWER cord. The raceway that provides the highest level of protection against physical damage is: - ANSWER rigid metal conduit (RMC). The raceway that comes in rolls rather than a standard length is: - ANSWER liquid tight flexible metal conduit. The raceway that will expand or contract the most with a change in temperature is: - ANSWER rigid polyvinyl chloride conduit. For short runs between access points, the required number of wires can be taped together at one end and pushed into the raceway until they emerge at the other end. For longer runs it is easier to insert a device called a/an: - ANSWER fishtape. When IMC or RMC conduit is installed at an enclosure with a connection such as double locknuts there will be a pipe end remaining that can result in damage to wire insulation. The Code requires a _________be installed on the end of the conduit to prevent abrasion to the wires. - ANSWER bushing
Examine the figure below. The correct method of terminating an insulated conductor around a screw is identified by letter: - ANSWER E. A 15 ampere, 125 volt, straight blade receptacles is installed in what is considered to be a wet location in a greenhouse. This receptacle should be marked: - ANSWER weather resistant (WR). Examine the receptacle shown in the picture below. The slot that is connected to the grounded or neutral conductor is identified by the letter: - ANSWER E. Receptacle outlets must be installed: - ANSWER in any orientation desired. The Code does not specify a mounting orientation. The maximum number of size 14 AWG, copper conductor permitted to be installed in a wire nut is: - ANSWER listed by the manufacturer in their information or packing material. A duplex receptacle is installed in a building that is wired with type NM cable and metal device boxes. The boxes are recessed in the wall so that the front is flush with the drywall surface. The receptacle has a listed self-grounding yoke as shown in the figure below. The receptacle grounding terminal: - ANSWER is permitted to be left open with no conductor connected to the grounding terminal. The screws of the receptacle will provide the necessary grounding connection. The wire which is permitted to be connected to the brass-colored screw of a receptacle outlet is permitted to: - ANSWER have black insulation. A short length of conductor used to connect from a wirenut to a terminal on an electrical device is called a: - ANSWER pigtail. Examine the receptacle shown in the picture below. This receptacle is rated for:
- ANSWER 20 amperes, 125 volts. Examine the receptacle shown in the picture below. The mounting strap or yoke is identified by the letter: - ANSWER C.
A single receptacle is installed on a 20 ampere circuit, the receptacle must be rated for: - ANSWER 20 amperes. If an electrical material or product is listed, that agency or group who is permitted to provide the listing for the material is: - ANSWER any qualified electrical testing laboratory. The organization in the United States, that maintains specifications that are used by manufacturers of electrical products so that product of one manufacturer will be compatible with the product of another manufacturer is: - ANSWER the National Electrical Manufactures Association (NEMA). For a 125 volt, 15- or 20-ampere receptacle, the grounded conductor is terminated to the screw that is the color: - ANSWER silver. If a receptacle outlet is designed and listed to prevent infants and children from inserting objects into the slots of the receptacle, it is called: - ANSWER tamper resistant (TR). For a 125 volt, 15- or 20-ampere receptacle, the ungrounded conductor is terminated to the screw that is the color: - ANSWER brass. The standard symbol for a duplex receptacle outlet is identified by the letter: - ANSWER B. Unless marked other wise a receptacle outlet should only be connected to: - ANSWER copper conductors. Under what conditions is it required to provide a grounded, neutral, conductor in a switch loop for a particular switch location? - ANSWER The switch control a lighting outlet, and the switch is situated where it is deemed not possible to install an additional cable at a later date. A short length of conductor used to connect from a wirenut to a terminal on an electrical device is called a: - ANSWER pigtail.
shown on the portion of the wiring system identified with an "X" are: - ANSWER no long lines and three short lines. The wiring method where it is NOT permitted to re-identify the white circuit conductor as an ungrounded conductor in a switch loop is: - ANSWER electrical metallic tubing (EMT). Under what conditions is it required to provide a grounded, neutral, conductor at each three-way switch location? - ANSWER The switches are control a lighting outlet in a living room, and the switches is situated where it is not possible to view the entire room from both switch locations. A type NM 14-2 wg cable has the following conductors: - ANSWER one bare, one white and one black wire within the outer jacket. How many three-way switches are necessary to control a single outlet from five locations? - ANSWER Two. Three-way and four-way switches must be installed: - ANSWER in any orientation desired. The Code does not specify a mounting orientation. How many four-way switches are necessary to control a single outlet from five locations? - ANSWER Three. Examine the three-way switch shown in the picture below. The ungrounded wire that runs to the switch load must be connected to the terminal identified by the letter: - ANSWER B. The standard symbol for a four-way switch is identified by the letter: - ANSWER D. A GFCI circuit breaker MUST be installed for circuits that serve: - ANSWER None of the responses listed here are correct. In an unfinished basement of a single-family dwelling, GFCI protection is NOT required for 15- and 20-ampere, 125 volt, receptacles that serve a: - ANSWER permanently installed burglar alarm system.
When a sink is installed at a dwelling unit, all 15- and 20-ampere, 125 volt, receptacles installed within _____________ feet of the sink must be GFCI protected. - ANSWER six. When used by personnel during construction, remodeling, maintenance, repair or demolition of a building or structure, GFCI protection is required for all, 125 volt,: - ANSWER 15-, 20- and 30-ampere receptacles. Many manufacturers of GFCI devices, suggest that to prevent nuisance tripping, the GFCI protected portion of the circuit should be kept to less than: - ANSWER 250 feet. Most manufactures of GFCI's recommend that they be tested to ensure they are working. The intervals that they often recommend they be tested is: - ANSWER monthly. A ground-fault circuit-interrupter (GFCI) receptacle or breaker that is installed for the protection of personnel is designed to open the circuit, if there is a current difference between the ungrounded conductor and the neutral conductor which exceeds: - ANSWER 5 milliamperes. A 15 ampere, 125 volt, straight blade, GFCI receptacle is installed outdoors to serve a deck area at a dwelling unit. This receptacle should be marked: - ANSWER tamper resistant (TR) and weather resistant (WR). Examine the GFCI receptacle shown in the picture below. The ungrounded wire that originates at the service panel must be connected to the terminal identified by the letter: - ANSWER B. Provided there are no sinks in the area, GFCI protection is required for 15- and 20 - ampere, 125 volt, receptacles installed in: - ANSWER a garage of a dwelling unit. Examine the circuit breaker shown below. If installed into a 120/240 volt service panel, this breaker would supply a circuit operating at: - ANSWER 240 volts.
When installed in a service panel, a GFCI circuit breaker: - ANSWER can only be wired to protect the entire branch circuit. The invisible layer of resistance that forms on an aluminum wire when exposed to air is called: - ANSWER oxide. A multi-wired branch circuit will have: - ANSWER more than one ungrounded conductor sharing a common neutral conductor. A 15- and 20-ampere, 125 volt, duplex receptacle outlet that is installed outdoors at a newly constructed dwelling is NOT required to: - ANSWER be multi-wired. A multi-wired branch circuit serving split wired receptacles will require: - ANSWER that each of the ungrounded conductors be disconnected from the source of power in the event of fault or other overcurrent event in the circuit. A 15 ampere, 125 volt, two-slot, ungrounded, duplex receptacle fails and is needed to be replaced. A three slot, grounded, receptacle is permitted to be installed as a replacement when: - ANSWER a GFCI receptacle is installed, or GFCI protection is provided for the receptacle. Examine the single-phase, 3-wire, 120/240 volt electrical system shown in the diagram. A 16-ampere load is connected between leg A and the neutral, a 10- ampere load is connected between leg B and the neutral. The current flowing on the neutral conductor is: - ANSWER 6 amperes. Examine the diagram of the single-phase, 3-wire electrical system with 120 volts between wire A and the neutral, and 120 volts between wire B and the neutral. Between wire A and B there will be: - ANSWER 240 volts. The standard symbol for a split-wired duplex receptacle outlet is identified by the letter: - ANSWER E. For a 125 volt, 15- or 20-ampere receptacle, the ungrounded conductor is terminated to the screw that is the color: - ANSWER brass.
If a receptacle outlet or switch is designed and listed for aluminum wire to be connected to it, it will be marked: - ANSWER CO/ALR. A single story dwelling has a basement. There are three bedrooms grouped at the end of a single hallway. The minimum number of smoke alarms required for this dwelling is - ANSWER five. For all new single-family dwelling construction in Michigan, a carbon monoxide detector is: - ANSWER required to be supplied by the building electrical system with battery back-up. A newly constructed three-bedroom dwelling has an attached garage and a fuel- fired (propane) heat source installed in the basement. The three bedrooms are grouped at the end of a single hallway. The minimum number of carbon monoxide alarms required for this dwelling is: - ANSWER three. For all new single-family dwelling construction, a smoke alarm is - ANSWER required to be supplied by the building electrical system with battery back-up and required to be interconnected with other units so that when one sounds an alarm all will sound the alarm. Type NM, nonmetallic sheathed cable, size 10 AWG will have an outer jacket that is the color - ANSWER orange The type of cable that is permitted to be direct buried without any additional protection is type: - ANSWER UF Over metal studs, 1/2 inch dry wall is to be installed. An electrical box for a switch is installed concealed into the wall space. The maximum amount the box can be recessed back from the finished surface of this noncombustible material is - ANSWER 1/4 inch The insulation on wires in a type NM cable are required to be 90oC rated. The 90oC rated wire from the below list is - ANSWER type NM - B A type NM, 14-3, with-ground, cable has the following conductors - ANSWER one bare, one white, one black and one red wire within the outer jacket.
According to the Michigan Residential Code, fireblocking is required for any cable or conduit that passes - ANSWER between floors When type SE cable is used to supply electrical cooking units in newly constructed single-family dwellings, it s required to have a separate grounded neutral and equipment grounding conductor. The type of SE cable that has one red, one black, one white and one bare conductor within an outer jacket is style
- ANSWER R The type of service entrance cable that is permitted to be direct buried without any additional protection is type - ANSWER USE Nonmetallic sheathed cable, Type NM is not permitted to be installed - ANSWER as a service entrance cable Type NM cable is run parallel to the edge of a framing member, an unprotected cable is located so that the distance from the edge of the cable to the edge of the framing member is at least - ANSWER 1-¼ inch According to the Michigan Residential Code, fireblocking is required for any cable or conduit that passes - ANSWER a horizontal distance of 10 feet The bending radius of Type NM cable shall not be less than ___________ times the diameter of the cable. - ANSWER 5
