Pick up the correct statement from the following:

Question:
Pick up the correct statement from the following:

1.Air bubbles in casting produce a dull sound by tapping their surfaces lightly with a hammer

2.Cupola furnace is used for the manufacture of cast iron

3.Red short iron is of no value for welding purpose

4.All the above.

Posted Date:-2021-03-26 00:43:35


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