« previous next »

Author Question: What is the purpose of purging with nitrogen while brazing? A) To help the flame burn a little ... (Read 28 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?

People with alcoholism are at a much greater risk of malnutrition than are other people and usually exhibit low levels of most vitamins (especially folic acid). This is because alcohol often takes the place of 50% of their daily intake of calories, with little nutritional value contained in it.

Did you know?

Immunoglobulin injections may give short-term protection against, or reduce severity of certain diseases. They help people who have an inherited problem making their own antibodies, or those who are having certain types of cancer treatments.

Did you know?

In the United States, there is a birth every 8 seconds, according to the U.S. Census Bureau's Population Clock.

Did you know?

Atropine, along with scopolamine and hyoscyamine, is found in the Datura stramonium plant, which gives hallucinogenic effects and is also known as locoweed.

Did you know?

Side effects from substance abuse include nausea, dehydration, reduced productivitiy, and dependence. Though these effects usually worsen over time, the constant need for the substance often overcomes rational thinking.

Nitrogen Cycle Nitrogen Cycle
Slash-and-burn agriculture contributes to the formation of malarial environments. Slash-and-burn agriculture contributes to the formation of malarial environments.
Notice the reddish-brown haze caused by nitrogen oxides that is often over many major cities. Notice the reddish-brown haze caused by nitrogen oxides that is often over many major cities.
Apply light tapotement on the head. Tapping lightly with the fingertips works well for this purpose. Apply light tapotement on the head. Tapping lightly with the fingertips works well for this purpose.
Soil is a crucial part of the nitrogen cycle Soil is a crucial part of the nitrogen cycle
Nitrogen dioxide decomposes at 300°C via a second-order process to produce nitrogen monoxide ... Nitrogen dioxide decomposes at 300°C via a second-order process to produce nitrogen monoxide ...
Video: Junction Types - Tight and Adherens Junctions

For a complete list of videos, visit our video library