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Two popular types of electronic dimmers are ____.


A) slide and rotate
B) slide and push
C) push and cord
D) rotate and cord

E) A) and B)
F) None of the above

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Electronic dimmers use triacs to chop the ac sine wave, so some incandescent lamps might ____ because the lamp filament vibrates.


A) buzz
B) hum
C) pulsate
D) whine

E) None of the above
F) B) and C)

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For track lighting installed in homes, it is not necessary to add ____________________ for the purpose of branch circuit, feeder, or service-entrance calculations.

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additional loads

Lighting track ____ permitted to be installed within a zone extending 3 feet horizontally and 8 feet vertically from the top of a bathtub rim.


A) is
B) is not

C) A) and B)
D) undefined

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Lighting track shall be supported twice if the track is not more than ____________________ ft and shall have one additional support for each additional ____________________ ft track.

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Describe two features of electronic dimmers.

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Electronic dimmers offer featu...

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What are the two basic types of dimmers?

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The two basic types of dimmers are electronic and autotransformer.

The most common type of dimmer used in residential applications is rated ____ watts, 125 VAC, 60 hertz.


A) 100
B) 250
C) 600
D) 800

E) A) and B)
F) A) and C)

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The Code section that prohibits running track lighting through walls or partitions is NEC ____________________.

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Electronic dimmers for use only to control incandescent lamps are marked with a(n) ____________________ rating.

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Lighting track in residential installations shall not be cut to length in the field unless permitted by the ____.


A) builder
B) local building codes
C) homeowner
D) manufacturer

E) B) and C)
F) A) and C)

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Lighting track in residential installations must not be installed ____.


A) in damp or wet locations
B) concealed
C) through walls or partitions
D) all of the above

E) A) and B)
F) B) and C)

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Lighting track is not permitted to be installed less than ____ above a finished floor unless it is protected against physical damage, or if the track is of the low-voltage type operating at less than 30 volts rms open-circuit voltage.


A) 5 feet
B) 6 feet
C) 6 feet 7 inches (two meters)
D) 7.5 feet

E) A) and C)
F) B) and C)

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Portable lighting track must meet which of the following requirements?


A) It shall not be longer than 8 feet.
B) It shall have have a cord not less than 5 feet permanently attached to the track.
C) It shall have overcurrent protection (fuse or circuit breaker) built into the plug cap.
D) All of the above

E) C) and D)
F) A) and C)

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In addition to being fastened to the outlet box, the track for track lighting is generally fastened to the ceiling with ____.


A) toggle bolts
B) screws
C) nails
D) both a and b

E) A) and B)
F) None of the above

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A receptacle below a 4-way switch in the corner of a living room is required because the Code requires that a receptacle be installed in any wall space ____ in. or more in width.


A) 12
B) 24
C) 36
D) 72

E) B) and D)
F) B) and C)

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B

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