NEC 2017 Journeyman Prep Quiz

The minimum working space on a circuit that is 120 volts to ground, with exposed live parts on one side and no live or grounded parts on the other side of the working space, is _______ ft. Select one: A. 1 B. 3 C. 4 D. 6

3

When the opening to an outlet, junction, or switch point is less than 8 in. in any dimension, each conductor shall be long enough to extend at least ____ outside the opening of the enclosure. Select one: A. 0 in. B. 3 in. C. 6 in. D. 12 in.

3 in.

A panelboard shall be provided with physical means to prevent the installation of more _______ devices than that number for which the panelboard was designed, rated, and listed. Select one: A. overcurrent B. equipment C. circuit breaker D. all of these

overcurrent

A two-branch parallel circuit has 2 A of current in one branch and 3 A in the other branch. The branch considered to carry the larger load is the branch with _____ A. A. 2 B. 3 C. 5 D. 6

3

______, 125V, and 250V receptacles installed in a wet location shall have an enclosure that is weatherproof whether or not the attachment plug cap is inserted. Select one: A. 15A B. 20A C. A and B D. none of these

A and B

Nonmetallic boxes can be used with ____. Select one: A. nonmetallic cables B. nonmetallic raceways C. flexible cords D. all of these

all of these

Overcurrent devices shall not be located _________. Select one: A. where exposed to physical damage B. near easily ignitable materials, such as in clothes closets C. in bathrooms of dwelling units D. all of these

all of these

Type UF cable shall not be used in ____. Select one: A. motion picture studios B. storage battery rooms C. hoistways D. all of these

all of these

The length of the cord for a trash compactor shall not be longer than _______, measured from the rear of the appliance. Select one: A. 2 ft B. 4 ft C. 6 ft D. 8 ft

4 ft

Equipment associated with the electrical installation can be located above or below other electrical equipment within their working space when the associated equipment does not extend more than _____ in. from the front of the electrical equipment. Select one: A. 3 B. 6 C. 12 D. 30

6

Which of the following switches must indicate whether they are in the open (off) or closed (on) position? Select one: A. General-use switches B. Motor-circuit switches C. Circuit breakers D. all of these

all of these

GFCI protection shall be provided for electrically heated floors in ________ locations. Select one: A. bathroom B. hydromassage bathtub C. kitchen D. all the above

all the above

A two-branch parallel circuit has a 30 Ohms and a 15 Ohms resistor. What is the total resistance? A. 2 Ohms B. 10 Ohms C. 45 Ohms D. 15 Ohms

10 Ohms

Branch-circuit conductors supplying a single continuous-duty motor shall have an ampacity not less than _________ rating. Select one: A. 125 percent of the motor's nameplate current B. 125 percent of the motor's full-load current as determined by 430.6(A)(1) C. 125 percent of the motor's full locked-rotor D. 80 percent of the motor's full-load current

125 percent of the motor's full-load current as determined by 430.6(A)(1)

A toaster is listed as 1560 W. When it is plugged into a 120 V circuit and starts to make toast, how many amperes will it draw? A. 1,440 B. 1,680 C. 13 D. 187,200

13

A 3-conductor SJE cable (one conductor is used for grounding) has a maximum ampacity of ________ for each 16 AWG conductor. Select one: A. 9A B. 11A C. 13A D. 15A

13A

The minimum clearance for overhead service conductors not exceeding 600V that pass over commercial areas subject to truck traffic is _________. Select one: A. 10 ft B. 12 ft C. 15 ft D. 18 ft

18 ft

There shall be a minimum of one ________ ampere branch circuit for the laundry receptacle outlet(s) in a dwelling unit. Select one: A. 30 B. 20 C. 15 D. GFCI 15

20

Snap switches rated _________ or less directly connected to aluminum conductors shall be listed and marked CO/ALR. Select one: A. 15A B. 20A C. 25A D. 30A

20A

Conductor derating factors shall not apply to conductors in nipples having a length not exceeding _____. Select one: A. 12 in. B. 24 in. C. 36 in. D. 48 in.

24 in.

In dwelling units, at least one receptacle outlet shall be installed at each peninsular countertop having a long dimension of ____ in. or greater, and a short dimension of _____ in. or greater. Select one: A. 12, 24 B. 24, 12 C. 24, 48 D. 48, 24

24, 12

A series circuit has two resistors. The resistors dissipate 10 W and 15 W. What is the total power dissipation of the circuit? A. 10 W B. 5 W C. 25 W D. 15 W

25 W

Each tap conductor to a common grounding electrode conductor for multiple separately derived systems shall be sized in accordance with _______ based on the derived ungrounded conductors of the separately derived system it serves. Select one: A. 250.66 B. 250.118 C. 250.122 D. 310.15

250.66

Branch-circuit conductors within ________ of a ballast shall have an insulation temperature rating not lower than 90 degrees C (194 degrees F). Select one: A. 1 in B. 3 in C. 6 in D. 8 in

3 in.

Rigid Polyvinyl Chloride conduit shall be securely fastened within ____ of each box. Select one: A. 6 in. B. 12 in. C. 24 in. D. 36 in.

36 in.

An electric motor is running on 120 V. The current is measured to be 2 A. How many ohms of resistance is the motor? A. 60 B. 118 C. 122 D. 240

60

The ampacity of 18 TFFN is __________. Select one: A. 6A B. 8A C. 10A D. 14A

6A

In other than dwelling units, attics and underfloor spaces containing heating, air-conditioning, and refrigeration equipment, at least one lighting outlet containing a switch or controlled by a wall switch shall be installed ________. Select one: A. at the equipment requiring servicing B. near the equipment requiring servicing C. A or B D. none of these

A or B

When using the subject indexing technique what should you do if the first subject you that choose to look up is not in the index? Select one: A. Use the table of contents B. Manually hunt for the article C. Choose another subject word and try again D. Give up

Choose another subject word and try again

A series circuit is a circuit that has only one path for _____ flow. A. Voltage B. Current C. Power D. Resistance

Current

_____ is a raceway of circular cross section having an outer liquidtight, nonmetallic, sunlight-resistant jacket over an inner flexible metal core. Select one: A. FMC B. LFNMC C. LFMC D. none of these

LFMC

Circuits that have more than one path for current flow are _____ circuits. A. Parallel B. Series C. Combination D. Short

Parallel

In general, the minimum size conductor permitted for use in parallel installations is ____ AWG. Select one: A. 10 B. 4 C. 1 D. 1/0

1/0

Liquidtight Flexible Nonmetallic Conduit shall be permitted for _____. Select one: A. direct burial where listed and marked for the purpose B. exposed work C. outdoors where listed and marked for this purpose D. all of these

all of these

Means shall be provided to simultaneously disconnect the ________ of all fixed electric space-heating equipment from all ungrounded conductors. Select one: A. heater B. motor controller(s) C. supplementary overcurrent protective device(s) D. all of these

all of these

In a concealed installation, Flexible Metal Conduit _____ connectors shall not be used. Select one: A. straight B. angle C. grounding-type D. none of these

angle

What NEC article has the majority of definitions? Select one: A. Table of contents B. article 100 C. article 400 D. index

article 100

Type AC cable is permitted in ___ installations. Select one: A. wet B. cable tray C. exposed D. b and c

b and c

Openings around electrical penetrations into or through fire-resistant-rated walls, partitions, floors, or ceilings shall ____ to maintain the fire-resistance rating. Select one: A. be documented B. not be permitted C. be firestopped using approved methods D. be enlarged

be firestopped using approved methods

Raceways and cables installed into the ____ of open-bottom equipment shall not be required to be mechanically secured to the equipment. Select one: A. bottom B. sides C. top D. any of these

bottom

Conductor sizes are expressed in American Wire Gage (AWG) or _______. Select one: A. inches B. circular mils C. square inches D. none of these

circular mils

A switchboard or panelboard containing a 4-wire, ________ system where the midpoint of one phase winding is grounded, shall be legibly and permanently field-marked to caution that one phase has a higher voltage-to-ground. Select one: A. wye-connected B. delta-connected C. solidly grounded D. ungrounded

delta-connected

A ________ shall be located in sight from the motor locations and the driven machinery location. Select one: A. controller B. protection device C. disconnecting means D. all of these

disconnecting means

Unused openings other than those intended for the operation of equipment, intended for mounting purposes, or permitted as part of the design for listed equipment shall be _________. Select one: A. filled with cable clamps or connectors only B. taped over with electrical tape C. repaired only by welding or brazing in a metal slug D. effectively closed to afford protection substantially equivalent to the wall of the equipment

effectively closed to afford protection substantially equivalent to the wall of the equipment

A flexible cord conductor intended to be used as a(n) _______ conductor shall have a continuous identifying marker readily distinguishing it from the other conductor or conductors. Select one: A. ungrounded B. equipment grounding C. service D. high-leg

equipment grounding

When sizing a feeder for the fixed appliance loads in dwelling units, a demand factor of 75 percent of the total nameplate ratings can be applied if there are _______ or more appliances fastened in place on the same feeder. Select one: A. two B. three C. four D. five

four

The two to six disconnects for a disconnecting means for a building supplied by a feeder shall be ______ Select one: A. the same size B. grouped C. in the same enclosure D. none of these

grouped

Receptacles mounted in boxes flush with the finished surface or projecting beyond it shall be installed so that the mounting yoke or strap of the receptacle is ________. Select one: A. held rigidly against the box or box cover B. mounted behind the wall surface C. held rigidly at the finished surface D. none of these

held rigidly against the box or box cover

Central heating equipment, other than fixed electric space-heating equipment, shall be supplied by a(n) _______ branch circuit. Select one: A. multiwire B. individual C. multipurpose D. small-appliance

individual

A ____ conductor that carries only the unbalanced current from other conductors of the same circuit shall not be required to be counted when applying the provisions of 310.15(B)(3)(a). Select one: A. neutral B. grounded C. grounding D. none of these

neutral

HPD cord shall be permitted for _________. Select one: A. not hard usage B. hard usage C. extra-hard usage D. all of these

not hard usage

On a 4-wire, delta-connected system where the midpoint of one phase winding is grounded, the conductor having the higher phase voltage-to-ground shall be durably and permanently marked by an outer finish that is ______ in color. Select one: A. black B. red C. blue D. orange

orange

The space above a hung ceiling used for environmental air-handling purposes is an example of _____, and the wiring limitations of ____ apply. Select one: A. a plenum used for environmental air, 300.22(B) B. other spaces used for environmental air, 300.22(C) C. a duct used for environmental air, 300.22(B) D. none of these

other spaces used for environmental air, 300.22(C)

The motor branch-circuit short-circuit and ground-fault protective device shall be capable of carrying the _______ current of the motor. Select one: A. varying B. starting C. running D. continuous

starting

What method is recognized as the easiest and most reliable way to look up NEC code articles? Select one: A. table of contents B. hunt and peck C. randomization D. subject indexing

subject indexing

Raceways, cable trays, cablebus, auxiliary gutters, cable armor, boxes, cable sheathing, cabinets, elbows, couplings, fittings, supports, and support hardware shall be of materials suitable for ____. Select one: A. corrosive locations B. wet locations C. the environment in which they are to be installed D. none of these

the environment in which they are to be installed

Flexible cords used in listed extension cord sets shall be considered protected against overcurrent when used in (within) _________. Select one: A. indoor installations B. unclassified locations C. the extension cord's listing requirements D. 50 ft of the branch-circuit panelboard

the extension cord's listing requirements

Enclosures not over 100 cu in. having threaded entries and not containing a device shall be considered to be adequately supported where ____ or more conduits are threaded wrenchtight into the enclosure and each conduit is secured within 3 ft of the enclosure. Select one: A. one B. two C. three D. none of these

two

Receptacles installed in a dwelling unit kitchen to serve countertop surfaces shall be supplied by not fewer than _____ small-appliance branch circuits. Select one: A. one B. two C. three D. four

two

When counting the number of conductors in a box, a conductor running through the box with an unbroken loop or coil not less than twice the minimum length required for free conductors shall be counted as ____ conductor(s). Select one: A. one B. two C. three D. four

two

All 15A and 20A, 125V receptacles installed in _____ of dwelling units shall have GFCI protection. Select one: A. unfinished attics B. finished attics C. unfinished basements D. finished basements

unfinished basements

A series circuit has a total resistance of 180 Ohms and an applied voltage of 120 V. What is the current flow? A. 300 A B. 1.5 A C. 60 A D. 0.667 A

0.667 A

The minimum distance that an outlet box containing tap supply conductors is permitted to be placed from a recessed luminaire is ________. Select one: A. 1 ft B. 2 ft C. 3 ft D. 4 ft

1 ft

Handhole enclosures covers shall require the use of tools to open, or they shall weigh over _____. Select one: A. 45 lb B. 70 lb C. 100 lb D. 200 lb

100 lb

An electric circuit has a resistance of 20 Ohms. The current is measured to be 6 A. How many volts are applied to the circuit? A. 3 1/3 B. 14 C. 26 D. 120

120

The dimension of working space for access to live parts operating at 300V, nominal-to-ground, where there are exposed live parts on both sides of the workspace is _____ ft according to Table 110.26(A)(1). Select one: A. 3 B. 3 1/2 C. 4 D. 4 1/2

4

In an ac system, the size of the grounding electrode conductor to a concrete-encased electrode that is the sole connection, shall not be required to be larger than a(n) ________ copper conductor. Select one: A. 10 AWG B. 8 AWG C. 6 AWG D. 4 AWG

4 AWG

Ten 1200 W lightning fixtures are connected on a 277 V system. How many amps might the circuit draw? A. 23 B. 60 C. 43 D. 54

43

Surface-mounted fluorescent luminaires in clothes closets shall be permitted on the wall above the door, or on the ceiling, provided there is a minimum clearance of _______ between the luminaire and the nearest point of a closet storage space. Select one: A. 3 in. B. 6 in. C. 9 in. D. 12 in.

6 in.

For circuits rated 100A or less, when the equipment terminals are listed for use with 75º conductors, the ________ column of Table 310.15(B)(16) shall be used to determine the ampacity of all THHN conductors installed. Select one: A. 30º C B. 60º C C. 75º C D. 90º C

75º C

In a parallel circuit, the total resistance is _____ value resistance. A. Larger than the smallest B. Smaller than the smallest C. Equal to the largest D. Equal to the smallest

Smaller than the smallest

In a series circuit with two resistors, the total resistance is equal to the _____ of the two resistors. A. Difference B. Product over the sum C. Sum D. Quotient

Sum

Fixture wires are used to connect luminaires to the _______ conductors supplying the luminaires. Select one: A. service B. branch-circuit C. feeder D. none of these

branch-circuit

The disconnecting means for a motor controller shall be designed so that it does not __________ automatically. Select one: A. open B. close C. restart D. shut down

close

A service is supplied by three metal raceways, each containing 600 kcmil ungrounded conductors. Determine the bonding jumper size for each service raceway. Select one: A. 1/0 AWG B. 3/0 AWG C. 250 kcmil D. 500 kcmil

1/0 AWG

Noncombustible surfaces that are broken or incomplete shall be repaired so there will be no gaps or open spaces greater than ____ at the edge of a cabinet or cutout box employing a flush-type cover. Select one: A. 1/32 in. B. 1/16 in. C. 1/8 in. D. 1/4 in.

1/8 in.

Nonmetallic cables can enter the top of surface-mounted cabinets, cutout boxes, and meter socket enclosures through nonflexible raceways not less than 18 in. or more than _____ ft in length if all of the required conditions are met. Select one: A. 3 B. 10 C. 25

10

A three-resistor circuit has a total power of 25 W. Two of the resistors dissipate 10 W and 5 W respectively. How much power does the third resistor dissipate? A. 25 W B. 10 W C. 2 W D. 15 W

10 W

Trade size 1 Intermediate Metal Conduit shall be supported at intervals not exceeding ____. Select one: A. 8 ft B. 10 ft C. 12 ft D. 14 ft

10 ft

Feeder and service loads for fixed electric space heating shall be calculated at _______ percent of the total connected load. Select one: A. 80 B. 100 C. 125 D. 200

100

The feeder conductor ampacity shall not be less than that of the service-entrance conductors where the feeder conductors carry the total load supplied by service conductors with an ampacity of ________ or less. Select one: A. 30 A B. 55 A C. 60 A D. 100 A

55 A

The dedicated equipment space for electrical equipment that is required for panelboards is measured from the floor to a height of _______ ft above the equipment, or to the structural ceiling, whichever is lower. Select one: A. 3 B. 6 C. 12 D. 30

6

Type UF cable used with a 24V landscape lighting system can have a minimum cover of ____. Select one: A. 6 in. B. 12 in. C. 18 in. D. 24 in.

6

Grounded conductors larger than ________ can be identified by distinctive white or gray markings at their terminations. Select one: A. 10 AWG B. 8 AWG C. 6 AWG D. 4 AWG

6 AWG

Where direct-buried conductors and cables emerge from grade, they shall be protected by enclosures or raceways to a point at least ____ above finished grade. Select one: A. 3 ft. B. 6 ft. C. 8 ft. D. 10 ft.

8

A three branch parallel circuit has resistors of 27 Ohms, 56 Ohms, and 15 Ohms. What is the total resistance? A. 9.64 Ohms B. 98 Ohms C. 18.22 Ohms D. 8.22 Ohms

8.22 Ohms

The two resistors in a series circuit have voltages of 25 V and 60 V. The applied voltage is _____. A. 35 V B. 85 V C. 25 V D. 60 V

85 V

How many chapters are there in the NEC? Select one: A. 6 B. 8 C. 9 D. NEC doesn't have chapters

9

In an area served by a separately derived system, the _______ shall be connected to the grounded conductor of the separately derived system. Select one: A. structural steel B. metal piping C. metal building skin D. A and B

A and B

Outside secondary conductors can be of unlimited length without overcurrent protection at the point they receive their supply if: Select one: A. The conductors are suitably protected from physical damage. B. The conductors terminate at a single circuit breaker or a single set of fuses that limits the load to the ampacity of the conductors. C. A and B D. none of these

A and B

What is the definition of bonding jumper? Select one: A. Connected to establish electrical continuity and conductivity. B. A reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected. C. The connection between two or more portions of the equipment grounding conductor. D. The connection between the grounded circuit conductor and the equipment grounding conductor at the service.

A reliable conductor to ensure the required electrical conductivity between metal parts required to be electrically connected.

A multioutlet assembly can be installed in ____. Select one: A. dry locations B. wet locations C. a and b D. damp locations

dry locations

You have been asked to add a 4200 W lighting fixture to a 20 amp lighting circuit. What is the voltage needed to comply with the NEC? A. 120 V B. 240 V C. 277 V D. none of the above

277 V

How many 400 W fixtures could be installed on a 120 V 15amp circuit? A. 3 B. 5 C. 6 D. 8

3

For cord-and-plug connected appliances, _______ plug and receptacle is permitted to serve as the disconnecting means. Select one: A. a labeled B. an accessible C. a metal enclosed D. none of these

an accessible

Exposed conductive parts of luminaires shall be ________. Select one: A. connected to an equipment grounding conductor B. painted C. removed D. A and B

connected to an equipment grounding conductor

Fixed electric space-heating equipment shall be considered a(n) _________ load. Select one: A. noncontinuous B. intermittent C. continuous D. none of these

continuous

In straight pulls, the length of the box or conduit body shall not be less than ___ times the trade size of the largest raceway. Select one: A. six B. eight C. twelve D. none of these

eight