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Author Question: Why are thermostatic expansion valves often used as the outdoor metering device for the heating ... (Read 55 times)

kwoodring

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on: Jul 24, 2018
Why are thermostatic expansion valves often used as the outdoor metering device for the heating cycle?
 
  A) TEVs can be adjusted in the field to match the heat pump's performance with the climate it will be operating in.
  B) TEVs are easier to install on the outdoor coil.
  C) TEVs allow the system pressures to equalize in the off cycle, allowing the use of low starting torque compressors.
  D) The TEV can modulate the refrigerant flow over the wide range of temperatures experienced in the heating mode.

Question 2

What air property is measured in grains?
 
  A) The weight of air.
  B) Wet-bulb temperatures.
  C) Grains are used to measure the amount of water in the air.
  D) Relative humidity.


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okolip

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Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

C


kwoodring

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Reply 2 on: Jul 24, 2018
Great answer, keep it coming :)

isabelt_18

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Reply 3 on: Yesterday
Wow, this really help

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