On heat recovery systems:
A) One indoor unit can be in heating mode while others are in cooling mode at the same time.
B) It is required that all indoor units be in heating mode.
C) It is required that all indoor units be in cooling mode.
D) Both A and B.
[Ques. 2] What are some differences between a flake ice machine and a cube ice machine?
A) The flake ice machine does not have a bin control or a photo-electric eye like a cube ice machine.
B) The flake ice machine has the same safety devices as the cube ice machine, as no additional safety devices are needed.
C) The flake ice machine has a vertical cylindrical evaporator and makes ice continuously, while the cube ice machine has a horizontal rectangular evaporator and makes ice in cycles.
D) The flake ice machine has a horizontal rectangular evaporator and makes ice in cycles, while the cube ice machine has a vertical cylindrical evaporator and makes ice continuously.
[Ques. 3] Energy codes and standards set minimum requirements for energy-efficient design and construction for ________ buildings that impact energy use and emissions for the life of the building.
A) new B) new and renovated
C) renovated D) old
[Ques. 4] How can a heat pump filter drier be differentiated from a standard filter drier?
A) By the shiny, polished appearance of the stainless steel core
B) By the two copper lines on each end of the drier
C) By the directional arrows pointing towards both ends of the drier
D) By the 600 psig pressure rating
[Ques. 5] What temperature sensors are used with a commercial air handler?
A) Preheat and postheat sensors
B) Mixed air, supply air, and preheat sensors
C) Preheat, low-temperature, and high-temperature sensors
D) Mixed air and separated air sensors
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