?What cools the motor of a wet-rotor circulator?
A. ?oil
B. ?external water source
C. ?cooling fan
D. ?the system's fluid
Answer: D
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All ____ must be equipped with a filtration system to clarify the water.
A. swimming pools B. spas C. saunas D. steam rooms
Most milk produced in the United States is Grade B.
Answer the following statement true (T) or false (F)
How many wires are needed for a communicating control system to control a three-stage heat, two-stage cool heat pump?
A) Nine wires—one for each stage plus reversing valve and power B) Five wires—one for each stage heat and cool C) Four wires—two for power and two for communication D) No wires are required because communicating systems are wireless.
Currently, the number of class 5 switches is increasing while the number of class 2 and class 1 switches is decreasing
Indicate whether the statement is true or false