?____ act as scavengers that combine with contaminants and float to form the slag on top of the weld.
A. ?Carbon and nickel
B. ?Silicon and manganese
C. ?Aluminum and copper
D. ?Sulfur and magnesium
Answer: B
You might also like to view...
Economically, the colony of Pennsylvania
A. got off to a very slow start. B. never prospered. C. received much help from New York. D. became profitable very quickly. E. had extensive plantations.
A direct-fired make-up air unit typically achieves a combustion efficiency of _____.
a. 70 percent b. 80 percent c. 90 percent d. 100 percent
The U.S. produces more beef than it consumes.
Answer the following statement true (T) or false (F)
When the outdoor temperature falls below the balance point, an air-to-air heat pump _____
a. must be shut down b. can no longer extract heat from the outside air c. requires supplemental heat d. can produce more heat than the structure requires