What NEC chapter would you expect to find rules that apply to nonmetallic sheathed cable, metal-clad cable, rigid metal conduit, and electrical metallic tubing?
a. Chapter 2, Wiring and Protection
b. Chapter 3, Wiring Methods and Materials
c. Chapter 4, Equipment for General Use
d. Chapter 5, Special Occupancies
b. Chapter 3, Wiring Methods and Materials
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How does the technician know which way to install an air filter?
What will be an ideal response?
What is one characteristic that sets VVT systems apart from the other approaches?
a. The need for a bypass damper. b. Heating and cooling can be provided simultaneously. c. It is ideal for zones with very different heating cooling needs. d. Heating cannot be provided by the central unit.
What component initiates the end of the defrost cycle?
A. The defrost air switch. B. The air restriction indicator. C. The thermostat. D. The defrost termination switch.
Construction lines are used to transfer what from one view to the other in orthographis projection
A. surfaces B. distances C. objects