NEC 2017
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| How many 400 W fixtures could be installed on a 120 V 15 amp circuit? a. 3 b. 5 c. 6 d. 8 | show 🗑
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| show | The correct answer is: 43
1200 W x 10 = 12000 W12000 W / 277 V = 43.321
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| show | The correct answer is: 13
1560 W / 120 V = 13 A
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| 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? Select one: a. 120 V b. 240 V c. 277 V d. none of the above | show 🗑
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| show | The correct answer is: 120
6 X 20 = 120 V
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| show | The correct answer is: 60
120 V / 2 A = 60
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| An electrical circuit has a voltage of 50 V and a resistance of 5 Ohms. What is the value of current? Select one: a. 10 A b. 45 A c. 55 A d. 250 A | show 🗑
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| A series circuit is a circuit that has only one path for _____ flow. Select one: a. voltage b. current c. power d. resistance | show 🗑
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| show | The correct answer is: sum
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| show | The correct answer is: 85 V
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| show | The correct answer is: 25 W
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| 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? Select one: a. 25 W b. 10 W c. 2 W d. 15 W | show 🗑
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| Circuits that have more than one path for current flow are _____ circuits. Select one: a. parallel b. series c. combination d. short | show 🗑
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| show | The correct answer is: smaller than the smallest
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| show | The correct answer is: 10 Ohms
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| A three branch parallel circuit has resistors of 27 Ohms, 56 Ohms, and 15 Ohms. What is the total resistance? Select one: a. 9.64 Ohms b. 98 Ohms c. 18.22 Ohms d. 8.22 Ohms | show 🗑
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| What NEC article has the majority of definitions? Select one: a. Table of contents b. article 100 c. article 400 d. index | show 🗑
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| How many chapters are there in the NEC? Select one: a. 6 b. 8 c. 9 d. NEC doesn't have chapters | show 🗑
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| 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 | show 🗑
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| 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 | show 🗑
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| 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. | show 🗑
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| show | The correct answer is: 20
Index Subject: LaundrySub Index: OutletsSub Index: Dwelling2017 NEC Article: 210.11(C)(2)
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| A storable swimming pool is capable of holding water to a maximum depth of ________ inches. Select one: a. 24 b. 36 c. 42 d. 48 | show 🗑
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| A series circuit has a total resistance of 180 Ohms and an applied voltage of 120 V. What is the current flow? Select one: a. 300 A b. 1.5 A c. 60 A d. 0.667 A | show 🗑
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| 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. Select one: a. 2 b. 3 c. 5 d. 6 | show 🗑
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| 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 | show 🗑
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| show | The correct answer is: unfinished basements
Subject: Ground fault circuit interruptersIndex: ReceptalcesSub Index: Required2017 NEC 210.8
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| show | The correct answer is: two
Subject : DwellingsIndex : ReceptaclesSub Index: Outlets2017 NEC 210.52
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| show | The correct answer is: 24, 12
Subject: Countertops,OutletsIndex: None2017 NEC 210.52(C)
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| 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 | show 🗑
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| 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 | show 🗑
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| 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 | show 🗑
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| show | The correct answer is: all of these
Subject : Overcurrent protectionIndex : Location2017 NEC 240.24(C),(D), and (E)
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| 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 | show 🗑
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| 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 | show 🗑
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| show | The correct answer is: 250.66
Subject : Grounding electrode conductorIndex : separately derived systemsor: sizing ORSubject: tapsIndex: seperatly derived systems 2017 NEC 250.30(A)(6)(2)(b)
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| show | The correct answer is: A and B
Subject : Grounding electrode conductorIndex : separately derived systemsORSubject: BondingIndex: Separately derived systems2017 NEC 250.30(A)(8)
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| show | The correct answer is: 4 AWG
Subject : ConcreteIndex : Electrodes encased inORSubject : Grounding electrode conductorIndex : Sizing 2017 NEC 250.66(B)
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| show | The correct answer is: 1/0 AWG
Subject : jumper, bondingIndex : Equipment2017 NEC 250.102(C)(2), Table 250.102(C)(1)
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| show | The correct answer is: 55 A
Subject : LoadsIndex : Feeders, calculations for2017 NEC 215.2(A)(3)
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| show | The correct answer is: grouped
Subject : Outside branch circuits and feedersIndex : More than one building or structureSub index: DisconnectSub Sub Index: Grouping2017 NEC 225.34
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| 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 | show 🗑
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| Conductor sizes are expressed in American Wire Gage (AWG) or _______. Select one: a. inches b. circular mils c. square inches d. none of these | show 🗑
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| 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 | show 🗑
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| show | The correct answer is: 75º C
Subject : TerminalsIndex : connections to,2017 Nec 110.14
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| show | The correct answer is: orange
Subject : Delta-connectedIndex : Identifying high-leg, 3-phase supply, 4-wire,
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| show | The correct answer is: 3
Subject : Working spaceIndex : About electrical equipment,
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| show | The correct answer is: 4
Subject : Working spaceIndex : About electrical equipment,
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| show | The correct answer is: 6
Subject : Working spaceIndex : About electrical equipment,
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| show | The correct answer is: 6
Subject : Working spaceIndex : About electrical equipment,
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| 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. | show 🗑
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| 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. | show 🗑
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| show | The correct answer is: the environment in which they are to be installed
Subject : Protection Index : General Equipment (or) Metal equipment
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| 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 | show 🗑
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| show | The correct answer is: 3 in.
Subject : ConductorsIndex :Length in boxes ORSubject : LengthsIndex : Free conductors at outlets and switches
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| 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 | show 🗑
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| 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 | show 🗑
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| show | The correct answer is: 1/0
Subject : ConductorsIndex : Paralleled
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| show | The correct answer is: 24 in.
Subject : Conduit nipplesIndex : N/A2017 NEC Chap. 9, Table 1 Note 4or 310.15(B)(3)(a)(2)Index refers to only chap. 9.
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| show | The correct answer is: neutral
Subject : NeutralIndex : Conductor
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| show | The correct answer is: 1/8 in.
Subject : Cabinets, cutout boxes, and meter socket enclosures,Index : Position in walls,NOTE: Takes you to 312.3 Close enough! 312.4 does not exist in the Index.
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| 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 | show 🗑
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| show | The correct answer is: all of these
Subject : Boxes (outlet, device, pull, and junction),Index : Nonmetallic,
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| 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 | show 🗑
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| show | The correct answer is: two
Subject : Boxes (outlet, device, pull, and junction),Index : Secured and supporting,ORSubject : Junction boxesIndex : Supports
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| show | The correct answer is: eight
Subject : Pull boxes
Index : Sizes, 4 AWG and larger conductors OR
Subject : Junction boxesIndex : Sizes, 4 AWG and larger conductors OR
Subject : Conduit bodiesIndex : pull and juction box
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| show | The correct answer is: 100 lb
Subject : Boxes (outlet, device, pull, and junction),
Index : Enclosures, handhole OR
Subject : Enclosures
Index : Handhole enclosures
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| show | The correct answer is: b and c
Subject : Armored cable (Type AC),
Index : Uses permitted,
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| Type UF cable shall not be used in ____. Select one: a. motion picture studios b. storage battery rooms c. hoistways d. all of these | show 🗑
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| show | The correct answer is: 10 ft
Subject : Intermediate metal conduit (Type IMC),Index : Supports and securing,
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| In a concealed installation, Flexible Metal Conduit _____ connectors shall not be used. Select one: a. straight b. angle c. grounding-type d. none of the | show 🗑
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| ____ 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 | show 🗑
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| show | The correct answer is: 36 in.
Subject : Rigid polyvinyl chloride conduit (Type PVC),
Index : Securing and supporting,2017 NEC 352.30(A)
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| show | The correct answer is: all of these
Subject : Liquidtight flexible nonmetallic conduit (Type LFNC),
Index : Uses permitted,2017 NEC 356.10(3) and (4)
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| show | The correct answer is: dry locations
Subject : Multioutlet assembly,
Index : Uses permitted2017 NEC 380.10
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| show | The correct answer is: not hard usage
Subject : Cords,Index : FlexibleSub
Index : Types
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| 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 | show 🗑
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| 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 | show 🗑
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| 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. | show 🗑
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| Exposed conductive parts of luminaires shall be ________. Select one: a. connected to an equipment grounding conductor b. painted c. removed d. A and B | show 🗑
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| 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 | show 🗑
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| 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 | show 🗑
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| The ampacity of 18 TFFN is __________. Select one: a. 6A b. 8A c. 10A d. 14A | show 🗑
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| show | The correct answer is: branch-circuit
Subject : Fixture wires,
Index : Uses permitted
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| show | The correct answer is: all of these
Subject : Switches
Index : Indicating OR
Subject : Circuit breakers Index : Indicating
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| 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 | show 🗑
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| show | The correct answer is: held rigidly against the box or box cover
Subject : Receptacles, cord connectors, and attachment plugs (caps),
Index : Mounting
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| show | The correct answer is: A and B
Subject : Outdoor receptacles,
Index : N/A OR
Subject : Damp or wet locations
Index : Receptacles
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| 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 | show 🗑
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| 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 | show 🗑
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| show | The correct answer is: individual
Subject : Heating equipment Index : Central
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| 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 | show 🗑
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| 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 | show 🗑
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| Fixed electric space-heating equipment shall be considered a(n) _________ load. Select one: a. noncontinuous b. intermittent c. continuous d. none of these | show 🗑
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| 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 | show 🗑
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| GFCI protection shall be provided for electrically heated floors in ________ locations. Select one: a. bathroom b. hydromassage bathtub c. kitchen d. all the above | show 🗑
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| 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 | show 🗑
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| 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 | show 🗑
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| 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 | show 🗑
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| show | The correct answer is: close
.Subject : Motors Index : Disconnecting means (References 430 - IX, Which is as close as you get.)
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| Hazardous locations shall be classified depending on the properties of the ____ that may be present, and the likelihood that a flammable or combustible concentration or quantity is present. Select one: a. flammable liquid produced vapors b. flammable gases c. combustible dusts d. all of these | show 🗑
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| Class I, Division 1 locations are those in which ignitable concentrations of _____ can exist under normal operating conditions. Select one: a. combustible dust b. easily ignitable fibers or flyings c. flammable gases or flammable liquid-produced vapors d. pyrotechnics | show 🗑
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| Locations in which combustible dust is in the air under normal operating conditions in quantities sufficient to produce explosive or ignitable mixtures are classified as ___. Select one: a. Class I, Division 2 b. Class II, Division 1 c. Class II, Division 2 d. Class III, Division 1 | show 🗑
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| show | The correct answer is: 2
Subject : Hazardous (classified) locations, Class III
Index : N/A
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| show | The correct answer is: hermetically sealed
Subject : Hermetically sealed
Index : Definition
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| Where the air conditioner disconnecting means is not within sight from the equipment, the provision for locking or adding a lock to the disconnecting means shall be on the switch or circuit breaker and remain in place ________ the lock installed. Select one: a. with b. without c. with or without d. none of these | show 🗑
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| Branch-circuit conductors supplying a single a/c motor-compressor shall have an ampacity not less than ______ percent of either the motor-compressor rated-load current or the branch-circuit selection current, whichever is greater. Select one: a. 100 b. 125 c. 150 d. 200 | show 🗑
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| An attachment plug and receptacle can serve as the disconnecting means for a single-phase room air conditioner rated 250 volts or less if _________. Select one: a. the manual controls on the room air conditioner are readily accessible and located within 6 ft of the floor b. an approved manually operable disconnecting means is installed in a readily accessible location within sight from the room air conditioner c. A or B d. A and B | show 🗑
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| show | The correct answer is: 125
Subject : Transformers
Index : Overcurrent protection OR
Subject : Overcurrent protection
Index : Transformers
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| Overcurrent protection for the secondary of a transformer rated 1000V or less having a primary current rating of 9A or more must be set at not more than _______ percent of the secondary current. Select one: a. 100 b. 125 c. 150 d. 170 | show 🗑
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| show | The correct answer is: 5/8 in.
Subject : Hazardous (classified) locations, Class I
Index : Sealing, OR
Subject : Sealing
Index : Conduit systems
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| show | The correct answer is: any of these
Subject : Hazardous (classified) locations, Class II
Index : Sealing OR
Subject : Sealing
Index : Conduit systems
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| Flexible cords used in Class II, Division 1 or 2 locations ____. Select one: a. shall be listed for hard usage b. shall be listed for extra-hard usage c. shall not be permitted d. none of these | show 🗑
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| show | The correct answer is: fibers/flyings
Subject : Hazardous (classified) locations, Class III
Index : Receptacles and attachment plugs OR
Subject : Receptacles, cord connectors, and attachment plugs
Index : Hazardous (classified) locations
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| Parking garages used for parking or storage can be considered as an unclassified location. Select one: a. True b. False | show 🗑
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| In commercial garage, GFCI protection shall be provided on all 15A and 20A, 125V receptacles installed where ____ is (are) to be used. Select one: a. electrical diagnostic equipment b. electrical hand tools c. portable lighting equipment d. any of these | show 🗑
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| show | The correct answer is: a and b
Code stated
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| show | The correct answer is: 100 ft
Subject : Gasoline dispensing and service stations, see Motor fuel dispensingfacilities
Index : Circuit disconnects
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| show | The correct answer is: four
Subject : Ambulatory Health Care Occupancy
Index : Definition2017 NEC 517.2 Nursing Home
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| In assembly occupancies, Type NM cable, AC cable, ENT, and PVC conduit can be installed in those portions of the building not required to be of ______ construction by the applicable building code. Select one: a. Class 1, Division 1 b. fire-rated c. occupancy-rated d. above ground | show 🗑
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| show | The correct answer is: lockable
Subject : Carnivals, circuses, fairs, and similar events Index : Power sourcesSub Index : Services2017 NEC 525.10(A)
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| Each portable structure at a carnival, circus, or fair shall be provided with a disconnect switch within sight of and within _____ of the operator's station. Select one: a. 3 ft b. 6 ft c. 8 ft d. 10 ft | show 🗑
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| The mobile home park secondary electrical distribution system to mobile home lots shall be __________. Select one: a. 120/208V, single-phase b. 120/240V, single-phase c. A or B d. none of these | show 🗑
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| Equipment enclosures on ______ must be located so as not to interfere with mooring lines. Select one: a. cars b. trucks c. panels d. piers | show 🗑
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| show | The correct answer is: without
Subject : Temporary installations
Index : Feeders2017 NEC 590.4(B)
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| show | The correct answer is: 48A
Subject : Swimming pools, fountains, and similar installations
Index : Heaters and heating equipment
Sub Index : Pool water heaters
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| show | The correct answer is: a or b
Subject : Controllers
Index : Electrically operated pool covers OR
Subject : Covers
Index : Pool cover, electrically operated OR
Subject : Swimming pools, fountains, and similar installations
Index : Ground-fault circuit interrupters
Sub Index : Pool covers
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| The branch circuit supplying submersible fountain equipment shall be ____, unless the equipment is listed for operation at not more than 15V. Select one: a. 240V b. GFCI protected c. a and b d. none of these | show 🗑
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| Where the disconnecting means is out of the line of sight from any section of the sign or outline lighting able to be energized, the disconnecting means must be capable of being _______ in the open position. Select one: a. secured b. bolted c. locked d. none of these | show 🗑
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| A working space not less than 3 ft high by 3 ft wide by _______ deep is required for each ballast, transformer, and electronic power supply where not installed in a sign. Select one: a. 2 ft b. 3 ft c. 4 ft d. 6 ft | show 🗑
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| A manufactured wiring system is a system assembled by a manufacturer, which cannot be inspected at the building site without _________. Select one: a. a permit b. a manufacturer's representative permit c. damage to or destruction of the assembly d. an engineer's supervision | show 🗑
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| show | The correct answer is: being locked in the open position
Subject : Elevators, dumbwaiters, escalators, moving walks, platform lifts, and stairway chairlifts
Index : Disconnecting means and control OR
Subject : Disconnecting means
Index : Elevators
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| Amplifiers, loudspeakers, and other equipment shall be located or protected so as to guard against environmental exposure or physical damage that might cause ________. Select one: a. a fire b. shock c. personal hazard d. all of these | show 🗑
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| Audio system equipment supplied by branch-circuit power shall not be located within ______ of the inside wall of a pool, spa, hot tub, fountain, or tidal high-water mark. Select one: a. 18 in. b. 2 ft c. 5 ft d. 10 ft | show 🗑
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| show | The correct answer is: grounded
Subject : Audio signal processing, amplification, and reproduction equipment
Index : Wiring of equipment racks
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| show | The correct answer is: Type DP
Subject : Information technology equipment
Index : Supply circuits and interconnecting cables
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| Wiring from an emergency source can supply any combination of emergency, legally required, or optional loads, provided the conductors _____. Select one: a. terminate in separate vertical sections of a switchboard b. terminate in the same vertical section of a switchboard c. terminate in a junction box identified for emergency use d. are identified as emergency conductors | show 🗑
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| In emergency standby power systems, only appliances and lamps required for emergency use shall be supplied by _____. Select one: a. emergency circuits b. multiwire branch circuits c. HID-rated circuit breakers d. a and b | show 🗑
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| A legally required standby system is intended to automatically supply power to ____ in the event of failure of the normal source. Select one: a. those systems classed as emergency standby power systems b. selected loads c. a and b d. none of these | show 🗑
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| show | The correct answer is: all of the loads
Subject : Legally required standby systems
Index : Capacity and rating
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| show | The correct answer is: the load, as calculated in Article 220
Subject : Optional standby systems
Index : Capacity and rating
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| show | The correct answer is: CL2P and CL3P
Class 1, 2, and 3 circuits, see Remote-control, signaling, and power-limited circuits
Subject : Remote-control, signaling, and power-limitedcircuits
Index : Class 2 and Class 3 circuits Sub Index: Listing (Takes you to 725 IV)Marking (Takes you to 725.179)
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| show | The correct answer is: power-limited fire alarm conductors or cables
Subject : Fire alarm systems
Index : Power limited Sub index : Installation OR
Subject : Enclosures
Index : Fire Alarm Ciruits and Conductors
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| Power-limited fire alarm cables installed within buildings shall be ____ as being resistant to the spread of fire. Select one: a. marked FR b. listed c. identified d. color-coded | show 🗑
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| show | The correct answer is: electrically conductive
Subject : Optical fiber cables
Index : Definitionor : Nonconductive Cable
Sub Section: Definition
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| show | The correct answer is: OFN and OFC
Subject : Optical fiber cables
Index : Marking Table2017 NEC 770.179(D)
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| Communications cables shall be separated by at least 2 in. from conductors of _____ circuits, unless permitted otherwise. Select one: a. power b. lighting c. Class 1 d. any of these | show 🗑
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| show | The correct answer is: 2 in.
Subject : Clearences
Index : Antennas2017 NEC 810.18(B) (Takes you to 810.18)
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| CATV coaxial cable can deliver power to equipment that is directly associated with the radio frequency distribution system if voltage is not over _____ volts and if the current supply is from a transformer or other power-limiting device. Select one: a. 60 b. 120 c. 180 d. 270 | show 🗑
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| Overhead coaxial cables for a CATV system shall be separated by at least ____ from lightning conductors, where practicable. Select one: a. 3 in. b. 6 in. c. 2 ft d. 6 ft | show 🗑
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| show | The correct answer is: a. pigtail all grounded conductors to ensure continuity
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| show | The correct answer is: the employer
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| show | The correct answer is: call 911 or a nearby medical center
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| While troubleshooting with capacitors on circuits under 1000 volts, the residual voltage of a capacitor shall be reduced to how many volts, nominal, or less within 1 minute after the capacitor is disconnected from the source? Select one: a. 60 b. 50 c. 70 d. 20 | show 🗑
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| Within 8 to 15 minutes after resetting it, a 20 amp circuit repeatedly trips its breaker. What is the most probable cause of the tripping breaker? Select one: a. ground fault b. short circuit c. arc fault d. overloaded circuit | show 🗑
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| show | The correct answer is: main breaker failure
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| A house built in 1954 with a history of electrical issues has a main electrical panel that is Federal Pacific. What should an electrician do to correct the situation? Select one: a. replace the breakers b. replace the panel c. clean the bus bars d. replace the bus bars | show 🗑
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| Resistance is measured with a(n) _______. Select one: a. ammeter b. ohmmeter c. voltmeter d. wattmeter | show 🗑
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| show | The correct answer is: ohmmeter
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| The meter that measures power is the __________. Select one: a. ohmmeter b. wattmeter c. voltmeter d. ammeter | show 🗑
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| show | The correct answer is: neutral-to-ground fault
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| Voltage should always be tested: Select one: a. From a known hot wire to the load b. From a known hot wire to a ground source c. Do not test for voltage. Read the label instead d. On series with the lamp | show 🗑
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| show | The correct answer is: It gives an instantaneous reading
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| Always check, when using a non-contact type voltage tester that: Select one: a. You're holding right side up. b. It's the right color for the voltage being checked. c. You have just checked it on a known energized circuit. d. You are not grounded. | show 🗑
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| show | The correct answer is: ampmeter
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| A piece of equipment used to measure the ohms to ground for installing the required grounding electrodes is called? Select one: a. Ground potential checkometer b. megger c. ground fault meter d. Digital Multi-meter | show 🗑
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| show | The correct answer is: improper phasing
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| show | The correct answer is: the equipment grounding conductor is touching the grounded conductor
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| NFPA 70E states that, a person who is trained and knowledgeable of the construction and operation of equipment or a specific work method who is trained to recognize and avoid the electrical hazards that might be present with respect to that equipment or work method is a Select one: a. competent person b. journeyman electrician c. qualified person d. certified electrician | show 🗑
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| show | The correct answer is: hazards or increased risk
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| show | The correct answer is: straight back/bent knees
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| show | The correct answer is: legs
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| According to CAL/OSHA which of the following would be considered a "confined space?" Select one: a. roof b. platform c. trench d. swimming pool | show 🗑
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| show | The correct answer is: enclosed or barricaded
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| A ladder is used to reach the top of a building 16 ft. tall. What distance should the bottom of the ladder be placed from the side of the building? Select one: a. 3 feet b. 4 feet c. 6 feet d. 10 feet | show 🗑
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| A combination circuit is a circuit that contains _________. Select one: a. only series components b. only parallel components c. both series and parallel components d. both voltage and current sources | show 🗑
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| One of the steps that occurs frequently during combination circuit solutions is _____ the circuit into a simpler circuit. Select one: a. redrawing b. enlarging c. expanding d. copying | show 🗑
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| The _____ is the same at any point in a series circuit. Select one: a. power b. voltage c. resistance d. current | show 🗑
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| Solving combination circuits includes a step in which you _____ the circuit to a simpler circuit. Select one: a. enlarge b. complicate c. expand d. reduce | show 🗑
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| A simple parallel circuit is a circuit that contains ______. Select one: a. only series components b. only parallel components c. both series and parallel components d. both voltage and current sources | show 🗑
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| During the solving of a combination circuit, it is necessary to simplify a parallel block to _____. Select one: a. two series resistors b. one series resistor c. one parallel resistor d. two parallel resistors | show 🗑
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| show | The correct answer is: trace the current path(s)
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| show | 2 x 12.9 x 18 x 190 = 24,510 Chapter 9 Table 8 #6 AWG conductor 26,240 cmil3.6
The correct answer is: 6 AWG
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| A 420 ft long, 288 volt 3 phase, branch circuit with a 34 amp load must be installed so as to not exceed a 4% voltage drop. What size THWN copper conductor with 75° terminations must be used? The K factor is 12.9. Select one: a. 8 AWG b. 6 AWG c. 4 AWG d. 2 AWG | show 🗑
|
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