Author Question: The purpose of purging the lines with nitrogen during brazing is to: A) Pressurize the lines for ... (Read 45 times)

misspop · **on:** Jul 24, 2018

The purpose of purging the lines with nitrogen during brazing is to:

A) Pressurize the lines for leak testing.
B) Increase the temperature of the torch flame and decrease brazing time.
C) Reduce the amount of refrigerant that must be added once the installation is completed.
D) Prevent the formation of copper oxide inside the lines.

Question 2

The National Electric Code and the National Fuel Gas Code are written by:

A) The International Code Council - ICC.
B) The National Fire Protection Association - NFPA.
C) The Underwriters Laboratories - UL.
D) Canadian Standards Association - CSA.