This topic contains a solution. Click here to go to the answer
« previous next »

Author Question: When pressurizing a system for leak testing, the only refrigerant that can be used as a trace gas is ... (Read 37 times)

Capo

  • Hero Member
  • *****
  • Posts: 545
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


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question
Marked as best answer by a Subject Expert

zenzy

  • Sr. Member
  • ****
  • Posts: 336
Reply #1 on: Jul 24, 2018
Answer to Question 1

d

Answer to Question 2

d


Capo

  • Member
  • Posts: 545
Reply 2 on: Jul 24, 2018
Great answer, keep it coming :)

Perkypinki

  • Member
  • Posts: 339
Reply 3 on: Yesterday
Wow, this really help

« previous next »
 

Did you know?

In Eastern Europe and Russia, interferon is administered intranasally in varied doses for the common cold and influenza. It is claimed that this treatment can lower the risk of infection by as much as 60–70%.

Did you know?

Since 1988, the CDC has reported a 99% reduction in bacterial meningitis caused by Haemophilus influenzae, due to the introduction of the vaccine against it.

Did you know?

Once thought to have neurofibromatosis, Joseph Merrick (also known as "the elephant man") is now, in retrospect, thought by clinical experts to have had Proteus syndrome. This endocrine disease causes continued and abnormal growth of the bones, muscles, skin, and so on and can become completely debilitating with severe deformities occurring anywhere on the body.

Did you know?

Between 1999 and 2012, American adults with high total cholesterol decreased from 18.3% to 12.9%

Did you know?

Studies show that systolic blood pressure can be significantly lowered by taking statins. In fact, the higher the patient's baseline blood pressure, the greater the effect of statins on his or her blood pressure.

Frequency coding in the nervous system: Threshold stimulus. Frequency coding in the nervous system: Threshold stimulus.
Endocrine System Endocrine System
Landsteiner's experiment demonstrating the exquisite specificity of the immune system. Landsteiner's experiment demonstrating the exquisite specificity of the immune system.
Digestive System Disorders Digestive System Disorders
Female Reproductive System Female Reproductive System
Insect tracheal system. Chitin rings reinforce branching, air-filled tubes in such respiratory syste Insect tracheal system. Chitin rings reinforce branching, air-filled tubes in such respiratory syste
Video: Osteoporosis

For a complete list of videos, visit our video library