The electrical power supplied to houses is usually:
A) 230 V, three-phase power. B) 440 V, single-phase power.
C) 240 V, single-phase power. D) 208 V, three-phase power.
C
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Fire-rated doors are rated as
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As industrial plants began to implement PLCs in a distributive or modular approach to controlling equipment, it was necessary to develop fast, ____________________, and reliable communications schemes to tie the various PLCs and their systems together.
Fill in the blank(s) with the appropriate word(s).
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