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Q:- Which of the following MMA electrode type is generally only suitable for welding in the PA and PB POSITIONS?

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A. Basic
B. Cellulosic
C. Rutile
D. Iron powder

Q:- n general thicker materials required higher pre heat temperatures, but for a given CEV and arc energy heat input, they are likely to remain similar for wall thicknesses up to approximately

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A. 10mm

B. 20mm

C. 40mm