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When brazing is finished, which of the following valves should be shut off first?

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When brazing is finished, which of the following valves should be shut off first?

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

[Ques. 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.

[Ques. 3] The minimum brazing temperature is about _____.

a. 1,200F (649C)
b. 1,300F (705C)
c. 1,425F (775C)
d. 1,550F (843C)

[Ques. 4] A mixture of oil and oxygen could cause _____.

a. corrosion
b. an explosion
c. low torch heat
d. excessive torch heat

[Ques. 5] Most non-copper metals can be brazed with which of the following filler metals?

a. Silver base
b. Phosphorus base
c. Lead base
d. Nickel base

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killmenowplease

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HereIam Author

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6 years ago

Wow! Thanks you for this correct set of answers, wasn't expecting it

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killmenowplease

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6 years ago

My pleasure!

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