The term interoperability refers to _____.
a. an energy management system that can be accessed using wireless phone technology
b. a system that allows the use of identical local and remote interface devices
c. the transfer of information and commands across building systems and different protocols
d. controllers that use identical protocols to function within a control system
c. the transfer of information and commands across building systems and different protocols
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The purpose of the M30 code is to:
A. End the program, and reset B. Start the spindle in a clockwise direction C. Start the spindle in a counter-clockwise direction D. Stop the spindle
An angle formed at a point outside a circle by two secants, two tangents, or a secant and a tangent is equal to one-____________________ the difference of the intercepted arcs.
Fill in the blank(s) with the appropriate word(s).
What is the purpose of the low ambient control on a commercial air conditioner?
A) To permit the unit to cool even at low ambient temperatures B) To cycle the air conditioning system based on ambient temperature C) To energize heat strips to control the ambient temperature D) To prevent the system from operating at low ambient temperatures
A circle with two parallel lines drawn through it is the symbol normally used for _____
a. blanked outlets b. duplex receptacles c. range receptacles d. junction boxes