Technician A says a refrigerant is considered contaminated if the refrigerant contains greater than 2 percent of foreign material(s). Technician B says moisture and air reduce the system's efficiency and are considered foreign material or contaminants. Who is correct?
A. Technician A only
B. Technician B only
C. Both A and B
D. Neither A nor B
Answer: C
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Designing a heating and cooling system to accommodate load shifts:
A) Improves efficiency. B) Allows buildings to operate with less installed capacity and still meet the demand. C) Improves comfort. D) All of the above.
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