Set 13 Practice Mode

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Q13344
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Which test indicates the hardness of a metal?
Q13345
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What type of preheating is done only at the portions to be welded?
Q13346
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Which type of polarity is used in welding non ferrous metals?
Q13347
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Which type of arc does not have control on the molten pool?
Q13348
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Which of the following produces unstable arc?