One difference between refrigerant piping practices for air-conditioning systems and refrigerant piping practices for commercial refrigeration systems is that:
A) The suction lines on air-conditioning systems do not require insulating because of their higher temperature.
B) Most commercial refrigeration system manufacturers do not recommend oil traps.
C) Most air-conditioning manufacturers do not recommend oil traps.
D) Suction lines are typically larger for air-conditioning applications for the same capacity of commercial refrigeration systems.
Question 2
Single-phase AC power is used:
A) Only in commercial buildings. B) In both residential and commercial buildings.
C) Only in Europe. D) Only in residences.
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