6. Which of the following is not a cold extrusion process?
a) Cold extrusion forging
b) Impact extrusion
c) Hydrostatic extrusion
d) Cold rolling
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Answer:
opition a
Explanation:
Cold extrusion is done at room temperature or near room temeprature. The processes, impact extrusion, hydrostatic extrusion andcold extrusion forging are the types of cold forging.
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