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 42 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 :)

shewald78

  • Member
  • Posts: 340
Reply 3 on: Yesterday
Excellent

« previous next »
 

Did you know?

The oldest recorded age was 122. Madame Jeanne Calment was born in France in 1875 and died in 1997. She was a vegetarian and loved olive oil, port wine, and chocolate.

Did you know?

There can actually be a 25-hour time difference between certain locations in the world. The International Date Line passes between the islands of Samoa and American Samoa. It is not a straight line, but "zig-zags" around various island chains. Therefore, Samoa and nearby islands have one date, while American Samoa and nearby islands are one day behind. Daylight saving time is used in some islands, but not in others—further shifting the hours out of sync with natural time.

Did you know?

Approximately 15–25% of recognized pregnancies end in miscarriage. However, many miscarriages often occur before a woman even knows she is pregnant.

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.

Did you know?

Common abbreviations that cause medication errors include U (unit), mg (milligram), QD (every day), SC (subcutaneous), TIW (three times per week), D/C (discharge or discontinue), HS (at bedtime or "hours of sleep"), cc (cubic centimeters), and AU (each ear).

The tracheal system of insects. The tracheal system of insects.
Different Classifications of Solar System Objects Different Classifications of Solar System Objects
The digestive system: functions of the small intestine and large intestine (colon) The digestive system: functions of the small intestine and large intestine (colon)
Disorders of the Urinary System Disorders of the Urinary System
The retina-geniculate-striate system: the neural projections from the retinas through the lateral ... The retina-geniculate-striate system: the neural projections from the retinas through the lateral ...
Paranasal sinuses are part of the upper respiratory system. From here, infections may spread via the ... Paranasal sinuses are part of the upper respiratory system. From here, infections may spread via the ...
Video: Structures that affect circulation - heart and systolic/diastolic BP

For a complete list of videos, visit our video library