welding practice test

Q:- Why is the arc shielded. When using an arc welding process?

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A. To eliminate the colling from the arc
B. To retarded cooling rate of solidify metal
C. To excluded the atmosphere from the arc region
D. The arc not always shielded when using an arc welding process

Q:- Which of the following may be added to an electrode flux to act as a stabiliser?

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1. Manganese
2. Silicon
3. Sodium silicate
4. Titanium dioxide

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