Where are unit ventilator fan coil units installed in schools?
A) In the school mechanical room B) On the roof above each classroom
C) Outside each classroom on a concrete pad D) Below window level in each classroom
D
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Technician A says that the freezing point of a substance is the temperature at which the substance changes state from a solid to a liquid. Technician B says that the freezing point of a substance is the temperature at which the substance changes state from a liquid to a solid. Which technician is correct?
A) Technician A only B) Technician B only C) Both technicians D) Neither technician
Electrons located in the outer shell of an atom are known as ____ electrons.
a. magnetic b. orbit c. nuclear d. valence
At least ____ inches of free conductor shall be left at each outlet, junction, and switch point.
A. 6 B. 8 C. 12 D. 18
The reversing valve on most air source residential heat pumps is energized:
A) During the heating cycle. B) During the defrost cycle. C) During the cooling cycle. D) During the cooling and the defrost cycles.