Volume 2 Final Exam

the final exam for volume 2

Which of the following systems shall be installed and removed in accordance with the NEC requirements?

(D) all of these

The Code covers underground mine installations and self-propelled mobile surface mining machinery and its attendant electrical trailing cable.

(B) False

Installations shall comply with the material located in the NEC Annexes because they are part of the requirements of the Code.

(B) False

Non-mandatory Informative Annexes contained in the back of the Code book are _____.

(D) for information only and not enforceable as a requirement of the Code

All _____ shall be covered with an insulation equivalent to that of the conductors or with an identified insulating device.

(D) all of these

The required working space for access to live parts of equipment operating at 300 volts-to-ground, where there are exposed live parts on one side and grounded parts on the other side, is _____ ft.

(B) 3 1/2

When determining a Class I, Division 2 location, the _____ is a factor that should be considered in determining the classification and extent of the location.

(D) all of these

Electrical and electronic equipment in hazardous (classified) locations shall be protected by a(an) _____ technique.

(D) any of these

Wiring methods and materials permitted in Class I, Division 1 locations include _____.

(D) all of these

Wiring methods permitted in Class I, Division 1 locations are permitted in Class I, Division 2 locations.

(A) True

General-purpose enclosures and fittings are permitted in Class I, Division 2 locations unless the enclosure contains make-and-break contacts for _____ as required by 501.105 (B) (1), 501.115 (B) (1), and 501.150 (B) (1).

(D) all of these

A sealing fitting shall be permitted to be installed within _____ ft of either side of the boundary where a conduit leaves a Class I, Division 1 location.

(D) 10

In Class I, Division 1 locations, seals for cables at all terminations, shall be installed within _____ in. of the enclosure or as required by the enclosure marking.

(C) 18

Circuit breakers in Class I, Division 2 locations that are not hermetically sealed or oil-immersed shall be installed in a Class I, Division 1 enclosure.

(A) True

Luminaires installed in Class I, Division 2 locations shall be protected from physical damage by a suitable _____.

(C) guard or by location

In Class I, Division 1 locations, all apparatus and equipment of signaling, alarm, remote-control, and communications systems _____ shall be identified for Class I, Division 1 locations.

(C) regardless of voltage

In Class II, Division 2 locations, where provision must be made for flexibility, _____ shall apply.

(A) 502.10 (A) (2)

In Class II, Division 1 locations, motors, generators, and other rotating electrical machinery shall be _____.

(D) identified for the location or totally enclosed pipe-ventilated

In Class II, Division 2 locations, flexible cord can serve as the supporting means for a pendant luminaire.

(B) False

In Class III locations, lucknut-bushing and double-locknut types of fittings may be depended on for bonding purposes.

(B) False

In Class III locations, portable lighting equipment shall be equipped with handles and protected with substantial guards. Lamp-holders shall be of the unswitched type with no provision for _____.

(A) receiving attachment plugs

In major repair garages where ventilation is not provided, any pit or depression below floor level shall be a Class I, Division _____ location.

(A) 1

Type NM cable can be installed above a Class I location in a commercial garage.

(B) False

In patient care spaces, metal faceplates shall be directly connected to an insulated copper equipment grounding conductor by means of _____ securing the faceplate to a metal yoke or strap of a receptacle or to a metal outlet box.

(C) metal mounting screws

In assembly occupancies, Type NM cable, ENT, and PVC conduit shall be permitted to be installed in those portions of buildings net required to be of _____ construction by the applicable building code.

(B) fire-rated

When installed indoors for carnivals, circuses, and fairs, flexible cords and flexible cables shall be listed for wet locations and shall be sunlight resistant.

(B) False

For carnivals and fairs, receptacles of the locking type not accessible from grade level that only facilitate quick disconnecting and reconnecting of electrical equipment shall not be required to be provided with GFCI protection.

(A) True

An “equipotential plane” is an area where wire mesh or other conductive elements are embedded in or placed under concrete and bonded to _____.

(D) all of these

Luminaires used in agricultural buildings shall _____.

(D) all of these

GFCI protection in a mobile home shall be provided for _____.

(D) all of these

Article 555 covers marinas, boatyards, docking facilities but not floating buildings.

(B) False

In land areas not subject to tidal fluctuation, the electrical datum plane shall be a horizontal plane that is _____ ft above the highest tide level for the area occurring under normal circumstances, based on the highest high tide.

(C) 2

Electrical connections shall be located at least _____ in. above the deck of a floating pier.

(A) 12

Shore power receptacles installed in accordance with 555.33 (A) shall have individual GFPE set to open at currents not exceeding _____ miliamperes.

(B) 30

A _____ shall be used to serve as the required shore power receptacle disconnecting means, and it shall be identified as to which receptacle it controls.

(D) circuit breaker, switch, or both

The provisions of Article _____ apply to temporary electric power and lighting installations.

(C) 590

Types NM, NMC, and SE cables can be used for branch circuits for temporary installations without height limitation and without concealment.

(A) True

Vegetation shall not be used to support overhead conductor spans of _____ for temporary installations.

(C) branch circuits or feeders

Where over-current protective devices that have been previously used are installed in a temporary installation, these over-current protective devices shall be examined to ensure these devices _____.

(D) all of these

Each commercial occupancy accessible to pedestrians shall have at least one sign outlet in an accessible location at each entrance to each tenant space supplied by a branch circuit rated at least _____.

(B) 20A

The disconnecting means for a sign or outline lighting system shall be permitted to be located at the point of entry to a sign and the disconnect shall be located at the point the feeder circuit or branch circuit(s) supplying a sign or outline lighting system enters a _____.

(D) any of these

Listed flexible metal conduit or listed liquid-tight flexible metal conduit that encloses the secondary circuit conductor from a transformer or power supply for use with neon tubing shall be permitted as a bonding means if the total accumulative length of the conduit in the secondary circuit does not exceed _____ ft.

(D) 100

Ballasts, transformers, electronic power supplies, and Class 2 power sources for signs shall be permitted to be located above suspended ceilings, provided that their enclosures are securely fastened in place and _____.

(B) not dependent on the suspended-ceiling grid for support

Each 15A and 20A, 125V, single-phase receptacle installed in pits, in hoist-ways, on the cars of elevators and dumbwaiters associated with wind turbine tower elevators, on the platforms or in the runways and machinery spaces of platform lifts and stairway chairlifts, ad in escalator and moving walk well-ways shall be _____.

(B) of the GFCI type

The lighting switch for hoist-way pits shall be readily accessible from the _____.

(A) pit access door

Article 625 covers the electrical conductors and equipment connecting an electric vehicle to premises wiring for the purposes of _____.

(D) all of these

For electric vehicle equipment rated more than _____ or more than 150 volts-to-ground, the disconnecting means shall be provided and installed in a readily accessible location.

(D) 60A

Article _____ covers apparatus for electric arc welding, resistance welding, plasma cutting, and other similar welding and cutting process equipment that is connected to an electrical supply system.

(C) 630

Each resistance welder shall have an over-current device rated or set at not more than _____ percent of the rated primary current of the welder.

(D) 300

Class 2 and Class 3 cables for audio signal processing, amplification, and reproduction equipment installed in accordance with 725.135 (B) and Table 725.154 shall be permitted to be installed in ducts specifically fabricated for environmental air.

(A) True