« previous next »

Author Question: What is the purpose of purging with nitrogen while brazing? A) To help the flame burn a little ... (Read 86 times)

vicotolentino

  • Hero Member
  • *****
  • Posts: 552
on: Jul 24, 2018
What is the purpose of purging with nitrogen while brazing?
 
  A) To help the flame burn a little hotter
  B) To check for leaks at the same time you are brazing
  C) To blow the oxides off the walls before it has a chance to firmly adhere
  D) To prevent oxide formation inside the pipes

Question 2

The most efficient operation is achieved with:
 
  A) Thermostatic expansion valves. B) Orifice-type metering devices.
  C) Automatic expansion valves. D) Capillary tubes.


Tabitha_2016

  • Sr. Member
  • ****
  • Posts: 344
Reply #1 on: Jul 24, 2018
Answer to Question 1

D

Answer to Question 2

A


Related Topics

Need homework help now?

Ask unlimited questions for free

Ask a Question

vicotolentino

  • Hero Member
  • *****
  • Posts: 552
Reply #2 on: Jul 24, 2018
TY


Tabitha_2016

  • Sr. Member
  • ****
  • Posts: 344
Reply #3 on: Jul 24, 2018
You're welcome


« previous next »
 

Did you know?

Drying your hands with a paper towel will reduce the bacterial count on your hands by 45–60%.

Did you know?

Though newer “smart” infusion pumps are increasingly becoming more sophisticated, they cannot prevent all programming and administration errors. Health care professionals that use smart infusion pumps must still practice the rights of medication administration and have other professionals double-check all high-risk infusions.

Did you know?

The most common treatment options for addiction include psychotherapy, support groups, and individual counseling.

Did you know?

Opium has influenced much of the world's most popular literature. The following authors were all opium users, of varying degrees: Lewis Carroll, Charles, Dickens, Arthur Conan Doyle, and Oscar Wilde.

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.

Assessing the degree of the burn. Bottom photos show (A) first-degree burn (sunburn) and (B) ... Assessing the degree of the burn. Bottom photos show (A) first-degree burn (sunburn) and (B) ...
Determining the extent of a burn: (A) rule of nines (adults); (B) Lund-Browder chart (children). Determining the extent of a burn: (A) rule of nines (adults); (B) Lund-Browder chart (children).
The flammable range consists of the concentration of fuel that will burn in atmospheric oxygen—the ... The flammable range consists of the concentration of fuel that will burn in atmospheric oxygen—the ...
Relationship between inorganic and organic nitrogen metabolism Relationship between inorganic and organic nitrogen metabolism
Reactions in assimilation of ammonia and major fates of the fixed nitrogen Reactions in assimilation of ammonia and major fates of the fixed nitrogen
The Zones of Injury Commonly Caused by a Thermal Burn The Zones of Injury Commonly Caused by a Thermal Burn
Video: Depolarization of the SA node, Action potentials of the myocardium & ANS effects

For a complete list of videos, visit our video library