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Author Question: When pressurizing a system for leak testing, the only refrigerant that can be used as a trace gas is ... (Read 75 times)

Capo

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on: Jul 24, 2018
When pressurizing a system for leak testing, the only refrigerant that can be used as a trace gas is _____.
 
  a. HFC-410A
  b. HFC-134a
  c. HFC-407C
  d. HCFC-22

Question 2

In which of these situations is it necessary to use outdoor air for combustion on an induced-draft furnace?
 
  a. It is always necessary.
  b. In locations where the outdoor temperature does not fall below 32F.
  c. When the furnace is within 50' of a living space.
  d. When there are chemicals near the furnace


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zenzy

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

d

Answer to Question 2

d


Capo

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Reply 2 on: Jul 24, 2018
Excellent

mohan

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Reply 3 on: Yesterday
Wow, this really help

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