Oil accumulation in the evaporator:
A) Can lead to leaks because refrigerant oil is corrosive to the metal used in evaporator coils.
B) Helps lubricate the walls of the evaporator.
C) Improves heat transfer in the evaporator.
D) Acts as an insulator reducing the heat transfer of the coil.
Question 2
What is the advantage of balanced-port TEVs?
A) Balanced port valves can be installed upside down.
B) Balanced port valves equalize on the off cycle, making it easier for the compressor to start.
C) Balanced port valves can retain good control over a wider range of operating conditions.
D) Balanced port valves can be converted from externally equalized valves to internally equalized simply by capping the equalizer port.
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(a) Uranium series dating uses the decay chain of radioactive uranium to stable lead.
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Using a black light to spot leaks after adding dye to the oil.
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