1.

Which of the following materials require a longer pouring time?(a) Non-ferrous material(b) Grey cast iron(c) Ferrous alloys(d) Brass

Answer» Right choice is (a) Non-ferrous material

For explanation: For nonferrous material, a longer pouring time would be beneficial since they lose heat slowly and also tend to form dross if a metal is poured too quickly, this dross makes the quality of the material poor and further defects induced in the material.


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