Multiple Choice
Identify the
choice that best completes the statement or answers the question.
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1.
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A porcelain lampholder with a pull-chain ____ permitted to serve as the lighting
outlet required by NEC® 210.70(A)(3).
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2.
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A detached garage with electric power is required to have ____.
a. | at least one receptacle | b. | at least two receptacles | c. | at least one
receptacle in addition to any provided for a permanently installed appliance such as a
freezer | d. | at least one receptacle outlet and one lighting
outlet |
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3.
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GFCI protection is required for all accessible receptacles installed in a garage
or storage building. Which of the following is not considered accessible?
a. | a receptacle provided for a permanently installed appliance such as a
freezer | b. | a ceiling-mounted receptacle for an electric garage door opener | c. | a receptacle
intended for use with portable electric power tools | d. | both a and b |
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4.
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To provide shock protection, low-voltage wiring systems are required by
Article 411 to be ____.
a. | double-insulated | b. | grounded | c. | supplied though
isolating transformers | d. | all of these |
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5.
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Overhead conductors ____ permitted to be supported by trees.
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6.
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Outdoor lighting fixtures and associated equipment ____ permitted to be
supported by trees.
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7.
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Type UF "underground feeder" cable ____ permitted to be used to supply
service entrances.
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8.
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Which of the following types of cable are permitted to be used for direct-burial
applications?
a. | Type NMB | b. | Type UF | c. | Type
USE | d. | both b and c |
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9.
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Metallic conduit buried underground must be protected against ____.
a. | backhoes | b. | corrosion | c. | galvanic
action | d. | all of these |
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10.
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The minimum depth for a 120-volt, 15-ampere, GFCI-protected circuit to an
outdoor pole light run under a paved driveway is ____.
a. | 6 inches | b. | 12 inches | c. | 18
inches | d. | 24 inches |
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11.
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When outdoor receptacles are installed where a cord will be plugged in
permanently, such as for decorative lighting, the box cover ____ maintain weatherproof integrity when
the cord is plugged in.
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12.
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The type of cable most often used for television signal distribution in new
residences is ____.
a. | 300-ohm twin-lead | b. | 150-ohm unshielded
twisted-pair | c. | 75-ohm coaxial | d. | Type FLP |
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13.
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When 120-volt receptacles and TV outlets are mounted in double-gang boxes, ____
is required in the box to isolate the TV conductors from the power wiring.
a. | a metal EMI shield | b. | a barrier | c. | double-grounding | d. | double-insulation |
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14.
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The article that covers TV wiring installations in residences is Article
____.
a. | 725 | b. | 810 | c. | 820 | d. | none of these |
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15.
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Which of the following rules apply to coaxial cable installations under
Article 820?
a. | The outer shield of the coaxial cable must be grounded close to its point of entry
into the building. | b. | Coaxial cables shall not be installed in the
same raceways or enclosures as electric light and power conductors. | c. | Coaxial cables are
not permitted to be fastened to raceways that contain electric light and power
conductors. | d. | all of these |
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16.
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The term gigahertz means ____.
a. | million cycles per second | b. | million bytes per second | c. | billion cycles per
second | d. | billion bytes per second |
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17.
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Residential telephone conductor installations must be made in accordance with
the requirements of ____.
a. | Article 800 | b. | Article 810 | c. | Article
820 | d. | none of these |
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18.
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Transformers and low-voltage wiring for doorbells are classified as ____
circuits under Article 725.
a. | Class 1 | b. | Class 2 | c. | Class
3 | d. | Power-limited |
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19.
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It ____ permitted to install Class 2 wiring in the same raceway or enclosure as
electric light and power wiring.
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20.
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Signaling circuit is defined in ____.
a. | Article 100 | b. | NEC® 725.1 | c. | NEC®
725.10(C) | d. | NEC® 800.3(B)(2) |
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21.
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According the layout of the garage, attic light and exterior ,light complete the
wiring diagram. identify each conductor with a letter or use a color pencil  a. |  | b. |  |
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