Which of the following commercial loads can be fed from a regular circuit rather than an emergency circuit?
a. Exit lights
b. Life safety systems
c. Fire alarm systems
d. Computer equipment
d. Computer equipment
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The numbers on the coordinate display show positions in a:
a. matrix coordinate system b. three-dimensional coordinate system c. graphic coordinate system d. Cartesian coordinate system
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At resonance, the current in Figure 13-2 is ________
A) 10 mA B) 10 A C) 1.66 4 D) 1.66 mA
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Doors and windows lose heat by air ____.
A. insulation B. convection C. radiation D. infiltration
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What things should you check during a trip?
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