Article - 640 Audio Signal Amplification and Reproduction Equipment

the article 640 section of the chapter 6 test

Electronic organs or other electronic musical instruments are included in the scope of Article 640.

(A) True

Audio distribution cable not terminated at equipment and not identified for future use with a tag is considered abandoned.

(A) True

For audio signal processing, amplification, and reproduction equipment, 300.22 (B) shall apply to _____ installed in ducts specifically fabricated for environmental air.

(C) equipment and circuits

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

Class 2 and Class 3 cables for audio signal processing, amplification, and reproduction equipment installed in accordance with 725.135 (C) and Table 725.154 shall not be permitted to be installed in other spaces used for environmental air (plenums).

(B) False

Amplifiers, loudspeakers, and other equipment shall be located or protected so as to guard against environmental exposure or physical damage that might cause _____.

(D) any of these

Exposed audio cables shall be secured by _____ or similar fittings designed and installed so as not to damage the cable.

(D) any of these

The accessible portion of abandoned audio distribution cables shall be removed.

(A) True

Audio cables identified for future use shall be marked with a tag of sufficient durability to withstand _____.

(C) the environment involved

Audio system equipment supplied by branch-circuit power shall not be placed horizontally within _____ of the inside wall of a pool, spa, hot tub, fountain, or the prevailing or tidal high water mark.

(C) 5 ft