To prevent contamination of the weld puddle, shielding gases are used to displace what from the weld zone?
a. Dross
b. Argon
c. Atmosphere
d. Carbon deposits
c
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Indicate whether the statement is true or false
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A) centrifugal B) reciprocating C) rotary D) scroll
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Answer the following statement true (T) or false (F)
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The internationally recognized green building certification system known as LEED is Leadership in Energy and Environmental Design.
a. True b. False
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