When brazing is finished, which of the following valves should be ...

[asan beg]

When brazing is finished, which of the following valves should be shut off first?
 
  a. Acetylene valve on the tank regulator
  b. Oxygen valve on the tank regulator
  c. Acetylene valve on the torch handle
  d. Oxygen valve on the torch handle

Question 2

Which of the following statements about brazing dissimilar metals is incorrect?
 
  a. Always use a phosphorus alloy to braze dissimilar metals.
  b. Always use a flux, even when one of the metals is copper.
  c. Different metals have different melting points.
  d. Different metals expand at different rates.

[tjayeee]

Answer to Question 1

d

Answer to Question 2

a

[asan beg]

Excellent

[dantucker]

Gracias!