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Author Question: Semi-hermetic compressors on large commercial AC units use ________ to stage the compressor by ... (Read 55 times)

leo leo

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on: Jul 27, 2018
Semi-hermetic compressors on large commercial AC units use ________ to stage the compressor by cutting out individual cylinders in response to load changes.
 
  A) Unloaders B) King valves
  C) Automatic expansion valves D) TXV valves

Question 2

There are no check valves or extra metering devices on most water-source packaged units because
 
  A) most water-source packaged units use suction line accumulators and charge compensators.
  B) its heat exchangers are most often made of copper, cupronickel, or stainless steel.
  C) water-source packaged units have a much lower operating temperature range than air-source units.
  D) most water-source packaged units use a single bi-flow thermostatic expansion valve.


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Hdosisshsbshs

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Reply #1 on: Jul 27, 2018
Answer to Question 1

A

Answer to Question 2

D


leo leo

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Reply 2 on: Jul 27, 2018
Excellent

xiaomengxian

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Reply 3 on: Yesterday
:D TYSM

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