What is subcooling? A) Lowering liquid refrigerant temperature ...

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What is subcooling?
 
  A) Lowering liquid refrigerant temperature below its saturation temperature
  B) Lowering refrigerant temperature by flashing some of it off to a gas, cooling the remaining liquid
  C) Lowering refrigerant temperature below 0F
  D) Lowering refrigerant temperature below freezing

Question 2

Why do standard-design thermostatic expansion valves need a minimum pressure drop to operate correctly?
 
  A) To ensure that the pin seats tightly during operation
  B) The internal adjustment springs have a minimum required torsion
  C) The bulb will not sense temperatures below 100 psig
  D) The pressure difference across the pin acts as an opening force

[Anna]

Answer to Question 1

A

Answer to Question 2

D

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[Anna]

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