Which of the following is true of breaking and remelting tungsten?
A) It should be melted with a DCEN current.
B) It should be broken squarely.
C) It should be melted by striking an arc on a piece of carbon.
D) It should not be melted by striking an arc on copper, as it will contaminate the tungsten.
Correct Answer:
Verified
Q10: Which of the following is true of
Q11: DCEP concentrates _ of the arc heat
Q12: The improved electron emission of the _
Q13: _ electrodes have a current-carrying capacity similar
Q14: AC concentrates about _ of its welding
Q16: Tungsten with the highest level of lanthanum
Q17: Tungsten electrodes that contain elements such as
Q18: Which of the following is an inert
Q19: _ results in welds with deep penetration,
Q20: In GTAW, the arc temperature is around
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